Syngas production plant and method for continuous producing syngas by gasification

Abstract

The present invention relates to a syngas producing plant for a continuous production of syngas with controlled properties by gasification of a feedstock having varying physical and / or chemical properties and a method for a continuous production of syngas by gasification of a feedstock having varying physical and / or chemical properties. The syngas plant comprises at least two pre-treatment units, wherein said pre-treatment units are different from each other, a first distributing unit, wherein the first distributing unit is upstream of and fluidically connected to each of the at least two pre-treatment units, and at least two gasifiers, wherein said gasifiers are different from each other.

Description

[0001] Syngas production plant and method for continuous producing syngas by gasification

[0002] Technical Area

[0003] The invention relates to a syngas producing plant and a method for a continuous production of syngas with controlled properties by gasification from a feedstock having varying physical and / or chemical properties.

[0004] Background of the Invention

[0005] Feedstocks for the (petro-)chemical industry made from waste and / or biomass are becoming more important for the transition to a more sustainable use of resources. One important of such feedstocks is syngas which is basically a mixture of H2 and CO in different molar ratios H2 : CO that can be obtained by a gasification reaction in a gasifier from waste and / or biomass. Syngas may further comprise CO2, H2O, CH4 and impurities. Syngas production from waste and / or biomass for later use as a fuel for heat generation is an established technology. The requirements for production of syngas as a fuel is less challenging because syngas as a feedstock for the (petro-)chemical industry must be provided for example as a continuous stream and fulfil tighter specifications in respect to the level and type of impurities present and the molar ratio H2: CO. The later use of syngas as a source material for e.g., synthesis of methanol (and olefins from methanol), synthetic natural gas, and Fischer-Tropsch hydrocarbons require such specifications. Because said base chemicals are produced in huge quantities in large plants, a continuous production mode and, accordingly, a continuous stream of syngas having controlled properties such as the molar ratio H2 : CO, concentration of CO, H2, CH4, CO2, H2O, minimization of impurities (e.g., tars, H2S, HCN, NH3, dust) as a source material are needed.

[0006] Waste and / or biomass is not well suited as a feedstock for the manufacture of syngas for the applications discussed above. The physical and / or chemical properties of waste and / or biomass such as water content, ash content, elemental composition, size, and calorific value are not constant but vary over time. Accordingly, the combination of a given pre-treatment method and a given type of gasifier produce a syngas stream with a varying yield, molar ratio H2 : CO and different amounts and types of impurities present in the raw syngas stream. The combination of a given pre-treatment method and a given gasifier type can only produce the required constant syngas stream with constant properties such as the molar ratio H2 : CO within a certain window of physical and / or chemical properties of waste and / or biomass such as water content, ash content, elemental composition, and calorific value. In case such physical and / or chemical properties of waste and / or biomass are outside said certain window the syngas yield and other properties of the syngas change which is not desirable for the use of syngas as a feedstock for the (petro-)chemical industry as discussed above. An advanced sequential batch gasification process is disclosed in WO 2013 / 179313 A1. The process enables a continuous production of syngas from a feedstock because production can continue in one of the sequential gasifiers while another of the sequential gasifiers is loaded with a new batch of feedstock in the meantime. This process is not suited for a continuous production of syngas with controlled properties by gasification of a feedstock with varying physical and / or chemical properties.

[0007] A two-stage gasifier system for generating syngas for gasifying a variety of feedstocks is disclosed in WO 2011 / 141927 A2. The gasifiers are installed and fluidically connected in a series. Accordingly, at least a portion of the feedstock is processed in two separate gasifiers wherein the first gasifier in the series of two gasifiers serves as a pyrolyzer, i.e., a kind of thermochemical pre-treatment of the feedstock prior to the gasification reaction in the second gasifier which results in syngas. Such a gasifier system has a limited application to feedstocks with varying physical and / or chemical properties because it is limited to a thermochemical pre-treatment of the feedstock which is only suitable for certain types of feedstocks.

[0008] A two-stage system for producing syngas from a feedstock is disclosed in US 2013 / 0137151 A1. The processes of this invention treat the raw syngas from a gasifier by (successive) non- catalytical partial oxidation.

[0009] A system comprising two or more fluidized bed gasifying reactors arranged in parallel, and two sets or more sets of more than two classes of separating devices is disclosed in CN 101967400 A. Each of the fluidized bed gasifiers comprises a separate set of more than two classes of separating devices. The system is suitable for a continuous syngas production because of redundant streams of the same or very similar combinations of gasifiers and separating devices. But the system is not suited for conversion of feedstocks with varying physical and / or chemical properties into a continuous stream of syngas with controlled properties because only one type of gasifiers is used.

[0010] A syngas production plant comprising two gasifiers is disclosed in WO 2007 / 003620 A1 and WO 2017 / 132542 A1. A a first distributing unit, wherein the first distributing unit is upstream of and fluidically connected to each of the at least two pre-treatment units and a second distributing unit, wherein the second distributing unit is upstream of and fluidically connected to each of the at least two gasifiers and wherein the second distributing unit is optionally also downstream of and fluidically connected to each of the at least two pre-treatment units are neither disclosed in WO 2007 / 003620 A1 nor in WO 2017 / 132542 A1. Hence, there is a need to provide systems and methods for a continuous production of syngas with controlled properties by gasification of a feedstock with varying physical and / or chemical properties which syngas is suitable for a continuous production of chemicals by methanol synthesis, methanation and Fischer-Tropsch reaction.

[0011] Summary of the Invention

[0012] This problem is solved by a syngas production plant for a continuous production of syngas with controlled properties by gasification of a feedstock, the feedstock having varying physical and / or chemical properties, the syngas production plant comprising:

[0013] (i) at least two pre-treatment units, wherein said pre-treatment units are different from each other,

[0014] (ii) a first distributing unit, wherein the first distributing unit is upstream of and fl uidically connected to each of the at least two pre-treatment units, and

[0015] (iii) at least two gasifiers, wherein said gasifiers are different from each other, and

[0016] (iv) an optional control unit which is receiving said at least one physical and / or chemical property automatically or manually which is measured by the optional at least one analytical unit or measured before and is thereby selecting a specific combination of one pre-treatment unit from said at least two pre-treatment units and one gasifier from said at least two gasifiers and optionally at least one analytical unit for measuring at least one physical and / or chemical property of said feedstock further comprising a second distributing unit, wherein the second distributing unit is upstream of and fluidically connected to each of the at least two gasifiers and wherein the second distributing unit is optionally downstream of and fluidically connected to each of the at least two pre-treatment units.

[0017] The specific combination of one pre-treatment unit and one gasifier is selected by comparing the at least one physical and / or chemical property value which was determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator. In case the means for storing information is a database, said database can be implemented in the optional control unit or used by an operator to compare the at least one physical and / or chemical value which was determined with combinations suitable-pre-treatment methods-suitable gasifi- er type for a continuous production of syngas having controlled properties for feedstocks having said at least one physical and / or chemical value as a property.

[0018] This problem is further solved by a method for a continuous production of syngas by gasification of a feedstock, the feedstock having varying physical and / or chemical properties, the method comprising the steps

[0019] (i) providing a feedstock having varying physical and / or chemical properties wherein at least one physical and / or chemical property of said feedstock was determined,

[0020] (ii) providing at least two feedstock pre-treatment units, wherein said pre-treatment units are different from each other and wherein each of the at least two pre-treatment units is suitable for one or more pre-treatment methods, and at least two gasifiers, wherein said gasifiers are different from each other,

[0021] (iii) selecting a specific combination of one pre-treatment unit from said at least two pretreatment units and one gasifier from said at least two gasifiers based on the at least one physical and / or chemical property measured in step (iii), and

[0022] (iv) continuously manufacture syngas having controlled properties from said feedstock in said specific combination of one pre-treatment unit and one gasifier.

[0023] The specific combination of one pre-treatment method and one gasification reactor is established by comparing the at least one feedstock physical and / or chemical property value measured with a database in which suitable combinations of feedstocks having said at least one physical and / or chemical property value-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties are stored.

[0024] Figures

[0025] Figure 1 shows a syngas production plant according to a first embodiment of the present invention.

[0026] Figure 2 shows a syngas production plant according to a first aspect of a second embodiment of the present invention.

[0027] Figure 3 shows a syngas production plant according to a second aspect of a second embodiment of the present invention.

[0028] Detailed Description of the Invention

[0029] The present invention is further described below with reference to the embodiments and figures, but the present invention is not limited to these embodiments, and any modifications or substitutions within the basic spirit of the present invention are still within the scope of the present invention as claimed. Definitions:

[0030] In the context of the present description and the accompanying claims, the term “about” preferably means a deviation of the thus described value of ±15%.

[0031] In the context of the present invention, the term “combinations thereof’ is inclusive of one or more of the recited elements.

[0032] In the context of the present invention, the term “mixture thereof” is inclusive of one or more of the recited elements.

[0033] The term “upstream of” is defined herein in respect to a succession of unit operations as located next to on the side which is against the flow direction of fluids passing said succession of unit operations.

[0034] The term “downstream of” is defined herein in respect to a succession of unit operations as located next to on the side which is in the flow direction of fluids passing said succession of unit operations.

[0035] The term “electronically connected to” refers to a connection between two or more units and / or elements and / or devices which allows the flow of an electrical current between said two or more units and / or elements and / or devices.

[0036] The term “fluidically connected to” in respect to two or more units is defined herein that a fluid such as a particulate solid, liquids, gases, and mixtures thereof can flow from one of such unit to the other such unit and flow through and / or along such an analytical unit. Two units “fluidically connected to” each other are for example connected by one or more pipes which each other or by screw conveyors or by extruders or by solids pumps.

[0037] The term “physically connected to” refers to a direct (“physical”) connection of two or more units (including gasifiers).

[0038] The term “data signal connected” is defined herein as a connection between two units such as an analytical unit and a control unit and / or between a control unit and a distribution unit which is suitable for transfer of a “data signal” between the two of such “data signal connected” units. A “data signal” is for example a measured value of a physical and / or chemical property of a feedstock measured with an analytical unit which value is transferred to a control unit wherein the control unit is “data signal connected” to said analytical unit. A “data signal” can be for example also a control signal which is generated in a control unit by comparing a measured value of a physical and / or chemical property of a feedstock with a database to select the preferred pretreatment method(s) and the preferred gasifier type for a feedstock with said measured value of a physical and / or chemical property and transferring said control signal to a distributing unit which distributes said feedstock to the preferred pre-treatment method(s) and optionally to the preferred gasifier type.

[0039] The term “natural gas pipeline grid” is defined herein as pipelines or a network of pipelines used to transport natural gas and methane, or which are / is suitable for the transport of natural gas and methane. “Natural gas pipeline grids” are also known as “natural gas networks”.

[0040] In a first embodiment of the present invention (Figure 1), at least one physical and / or chemical properties of the feedstock (10) is determined with at least one analytical unit (11) by measuring said at least one physical and / or chemical properties of the feedstock (10) and the result of the determined at least one physical and / or chemical properties of the feedstock (10) is read manually by e.g., an operator or send to an optional control unit (12) which is data signal connected to the at least one analytical unit (11) as a data signal.

[0041] The at least one physical and / or chemical property of the feedstock (10) can be determined with at least one analytical unit (11) for example after the feedstock is delivered to the site where the production system according to the present invention or the first distributing unit (13) and the at least two-pre-treatment units (14a;14b) of the production system according to the present invention are located.

[0042] Optionally, the at least one physical and / or chemical property of the feedstock (10) can also be determined with at least one analytical unit (11) at a different location, e.g., a location where the feedstock is gathered and / or stored.

[0043] Next, the feedstock (10) is directed by the first distributing unit (13) to one of the at least two pre-treatment units (14a; 14b) based on the determined value of the at least one physical and / or chemical property of the feedstock (10). The at least two pre-treatment units (14a; 14b) are downstream of and fluidically connected to the first distributing unit (13).

[0044] In case the syngas production plant comprises a control unit (12), said control unit (12) is preferably data signal connected to the first distributing unit (13) which receives a control signal for choosing one of the at least two pre-treatment units (14a;14b) after the control unit (12) received the determined value of the at least one physical and / or chemical property of the feed- stock (10) from the at least one analytical unit (11) automatically and / or manually. Thereby, one of the at least two pre-treatment units (14a; 14b) is selected by the first distributing unit (13). A fluidic connection between the feedstock (10) and said one specific of the at least two pretreatment units (14a;14b) is then established and the feedstock (10) is pre-treated according to the measured value of the at least one physical and / or chemical property of the feedstock (10). The first distributing unit (13) serves as a storage unit for the feedstock (10) and as a distributor which directs the feedstock (10) to one of the at least two pre-treatment units (14a;14b).

[0045] The pre-treated feedstock (15a) or (15b) then leaves the respective pre-treatment unit (14a;14b) and is directed by the second distributing unit (16) to the one specific gasifier of the at least two gasifiers (17a; 17b) which was selected manually or automatically by the optional control unit (12) based on the determined value of the at least one physical and / or chemical property of the feedstock (10). In case the syngas production plant comprises a control unit (12), said control unit (12) is data signal connected to the second distributing unit (16) which receives a control signal for choosing one specific gasifier of the at least two gasifiers (17a; 17b) after the control unit (12) received the determined value of the at least one physical and / or chemical property of the feedstock (10) from the at least one analytical unit (11) or the control unit (12) receives the determined value of the at least one physical and / or chemical property of the feedstock (10) from the at least one analytical unit (11) manually by e.g., an operator.

[0046] In case the value of the determined property is read manually by e.g., an operator, the first distributing unit (13) is adjusted manually by e.g., an operator or the operator submits the value of the determined property to an optional control unit (12) which sends a control signal to the data signal connected first distributing unit (13).

[0047] The second distributing unit (16) is downstream of and fluidically connected to the at least two pre-treatment units (14a; 14b) and upstream of and fluidically connected to the at least two gasifiers (17a;17b). The second distributing unit (16) serves as a storage unit for the pre-treated feedstock (15a;15b) and / or as a distributor which directs the pre-treated feedstock (15a;15b) to one specific of the at least two gasifiers (17a; 17b).

[0048] Next, the pre-treated feedstock (15a; 15b) is subjected to a gasification reaction in one specific of the at least two gasifiers (17a; 17b) and a raw syngas stream (18a; 18b) leaves on of the at least two gasifiers (17a;17b) in downstream direction.

[0049] The specific combination of one pre-treatment unit (14a; 14b) and one gasifier (17a; 17b) is selected by comparing the at least one physical and / or chemical property value which was deter- mined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator. In case the means for storing information is a database, said database can be implemented in the optional control unit (12) or used by an operator to compare the at least one physical and / or chemical value which was determined with combinations suita- ble-pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties for feedstocks having said at least one physical and / or chemical value as a property.

[0050] The syngas production plant according to the present invention optionally further comprises a central syngas purification unit (19) which is downstream of and fluidically connected to the at least two gasifiers (17a;17b). The raw syngas (18a;18b) enters the optional central syngas purification unit (19) in which impurities are removed from the raw syngas (18a; 18b) and clean syngas (20) leaves the optional central syngas purification unit (19) in downstream direction.

[0051] All units and components of the syngas production plant according to the first embodiment of the present invention are installed in one location except of the at least one analytical unit (11) which is installed in said same location and / or is installed in another location.

[0052] The syngas production plant according to the first and any other embodiments optionally further comprises at least one further chemical production unit for producing a chemical compound or mixture of chemical compounds. The at least one further chemical production unit is selected from the group comprising methanation unit, methanol synthesis unit, and Fischer-Tropsch reaction unit in which the clean syngas (20) is used as a source material. The at least one further chemical production unit is downstream of the optional central syngas purification unit.

[0053] The clean syngas (20) can be converted into methane in the methanation unit by a methanation reaction. The optional methanation unit is either fluidically connected to the central syngas purification (19) or a water-gas shift unit is downstream of and fluidically connected to the central syngas purification unit and the methanation unit is downstream of and fluidically connected to the water-gas shift unit. The clean syngas (20) having a first molar ratio H2: CO is converted in the optional water-gas shift unit by a water-gas shift reaction to a syngas having a second molar ratio H2: CO, wherein the second molar ratio H2: CO is larger than the first molar ratio H2: CO. The methane yield from said syngas having a second molar ratio H2: CO is increased in comparison to the methane yield from the clean syngas (20).

[0054] The methanation reaction is described by chemical reaction schemes (1) and (2):

[0055] CO + 3H2-> CH4+ H2O (1)

[0056] The methanation reaction is for example a catalytic reaction using nickel on alumina catalysts, preferably a honeycomb shape catalyst, at 1 to 70 bar and 200 to 700 °C, preferably 5 to 60 bar, more preferably 10 to 45 bar and preferably 200 to 550 °C.

[0057] The methanation reaction and suitable methanation units are for example described in S. Rbnsch, J. Schneider, S. Matthischke, M. Schluter, M. Gdtz, J. Lefebvre, P. Prabhakaran, S. Bajohr: Review on methanation - From fundamentals to current projects; Fuel 166 (2016) 276- 296 and can be selected and adapted by the skilled person.

[0058] The H2content in the syngas having a second molar ratio H2: CO is higher than in said clean syngas (10) having a first molar ratio H2: CO. This step is known as water-gas shift reaction and represented by the chemical reaction scheme (3):

[0059] The water-gas shift reaction will operate with a variety of catalysts (such as copper-zinc- aluminum catalysts and chromium or copper promoted iron-based catalysts) in the temperature range between about 200 °C and about 480 °C. The type of water-gas shift reaction und unit(s) required can be adapted to the general conditions of the process (e.g., how much additional H2obtained by chemical reaction scheme (3) is desired).

[0060] The methane obtained from the syngas (20) or an optional syngas having a second molar ratio H2: CO can be fed into a natural gas pipeline grid and thereby transported to a second location such as a chemical facility where the methane can be used for example as a feedstock for production of other chemical products.

[0061] The clean syngas (20) can be converted into methanol in an optional methanol synthesis unit. Methanol is produced from syngas by a catalytic gas phase reaction at about 5 MPa to about 10 MPa and about 200 °C to about 300 °C using a catalyst in a low-pressure methanol process in e.g., adiabatic reactors or quasi-isothermal reactors. The clean syngas (20) is provided by the syngas purification unit or by an optional water-gas shift unit in which the molar ratio H2: CO is modified for the methanol synthesis. The catalyst is for example a mixture of copper and zinc oxides, supported on alumina. The methanol synthesis and various options thereof suitable to be combined with the production system according to the present invention are disclosed in Ullmann's Encyclopedia of Industrial Chemistry (2012), Chapter “Methanol”, p. 3 to 12.

[0062] The clean syngas (20) can be converted into hydrocarbons such as light synthetic crude oil in an optional Fischer-Tropsch (FT) reaction unit by the FT process. The light synthetic oil can be further converted by hydrocracking and / or isomerization to naphtha, light olefins, or diesel fuel. For production of gasoline and light olefins, the FT process is operated in a temperature range of about 330 °C to about 350 °C and a pressure of about 2.5 MPa (high-temperature FT- process), for production of waxes and / or diesel fuel, in a temperature range of about 220 °C to about 250 °C and a pressure of about 2.5 MPa to about 4.4 MPa (low-temperature FT-process). Suitable reactors for low-temperature FT-processes comprise tubular fixed-bed reactors and slurry bed reactors. Suitable reactors for high-temperature FT-processes comprise circulating fluidized-bed reactors and SAS (Sasol advanced synthol) reactors. Iron- and / or cobalt-based catalysts are used for the FT-process. The Fischer-Tropsch synthesis and various options thereof suitable to be combined with the production system according to the present invention are disclosed in Ullmann's Encyclopedia of Industrial Chemistry (2012), Chapter “Coal Liquefaction”, p. 20 to 33.

[0063] In a first aspect of the second embodiment of the present invention (Figure 2), at least one physical and / or chemical properties of the feedstock (100) is determined with at least one analytical unit (110) and the result of the determined property is read manually by e.g., an operator or send to an optional control unit (120) which is data signal connected to the at least one analytical unit (110). Next, the feedstock (100) is directed by the first distributing unit (130) to one of the at least two pre-treatment units (140a; 140b) based on the determined at least one physical and / or chemical property of the feedstock (100). The at least two pre-treatment units (140a;140b) are downstream of and fluidically connected to the first distributing unit (130).

[0064] In case the value of the determined property is read manually by e.g., an operator, the first distributing unit (130) is adjusted manually by e.g., an operator or the operator submits the value of the measured property to an optional control unit (120) which sends a control signal to the data signal connected first distributing unit (130). In case the syngas production plant comprises a control unit (120), said control unit (120) is preferably data signal connected to the first distributing unit (130) which receives a control signal for choosing one of the at least two pre-treatment units (140a; 140b) after the control unit (120) received the determined value of the at least one physical and / or chemical property of the feedstock (100) from the at least one analytical unit (110). Thereby, one specific of the at least two pre-treatment units (140a; 140b) is selected by the first distributing unit (130) and a fluidic connection between the feedstock (100) and said one specific of the at least two pre-treatment units (140a;140b) is established. The feedstock (100) is then pre-treated according to the determined value of the at least one physical and / or chemical property of the feedstock (100). The first distributing unit (130) serves as a storage unit for the pre-treated feedstock (150a; 150b) and / or as a distributor which directs the feedstock (100) to one specific of the at least two pretreatment units (140a;140b).

[0065] The pre-treated feedstock (150a; 150b) then leaves the respective pre-treatment unit (140a;140b) in downstream direction.

[0066] The optional at least one analytical unit (110), the first distributing unit (130), the at least two pre-treatment units (140a; 140b) and the optional control system (120) can be part of a facility a which is installed in a first location. The first location is preferably a location where the feedstock is available and / or stored.

[0067] Optionally, the at least one analytical unit (110) is installed in another location and, accordingly, the at least one physical and / or chemical property of the feedstock (100) may not be determined at the first location where facility a is installed. The at least one physical and / or chemical property of the feedstock (100) can also be determined with at least one analytical unit (110) at a different location.

[0068] The pre-treated feedstock (150a; 150b) is then transported to a facility b which is installed in a second location. The first location and the second location are different from each other. Accordingly, there is no fluidic connection for the pre-treated feedstock (150a; 150b) in facility a and the pre-treated feedstock (150a; 150b) in facility b. Preferably, the second location where facility b is installed is a location where syngas is required a feedstock for the chemical industry and / or as a fuel.

[0069] The pre-treated feedstock (150a; 150b) can be transported to facility b for example by ship, freight train, or truck. The feedstock (100) is preferably pre-treated with one or more of comminution and drying, agglomeration such as pelletizing, briquetting and extrusion, and thermo- chemical such as pyrolysis, torrefaction, for example to reduce the feedstock volume prior to such transport from facility a to facility b.

[0070] The pre-treated feedstock (150a; 150b) is then inserted at facility b into one specific of the at least two gasifiers (170a; 170b). The one specific gasifier of the at least two gasifiers (170a; 170b) is manually by e.g., an operator selected, based on the determined value of the at least one physical and / or chemical property of the feedstock (100). The pre-treated feedstock (150a; 150b) is converted into raw syngas (180a; 180b) by a gasification reaction in one specific of the at least two gasifiers (170a; 170b) which leaves the one specific of the at least two gasifiers (170a;170b) in downstream direction. Impurities are then removed from the raw syngas (180a; 180b) in the optional central syngas purification unit (190) from which clean syngas (200) leaves in downstream direction. The optional central syngas purification unit (190) is downstream of and fluidically connected to the at least two gasifiers (170a;170b).

[0071] The specific combination of one pre-treatment unit (140a;140b) and one gasifier (170a;170b) is selected by comparing the at least one physical and / or chemical property value which was determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator. In case the means for storing information is a database, said database can be implemented in the optional control unit (120) or used by an operator to compare the at least one physical and / or chemical value which was determined with combinations suita- ble-pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties for feedstocks having said at least one physical and / or chemical value as a property.

[0072] A second aspect of the second embodiment of the present invention is shown in Figure 3. At least one physical and / or chemical property of the feedstock (300) is determined with at least one analytical unit (310) and the result of the measured property is read manually by e.g., an operator or send to an optional control unit (320a) which is preferably data signal connected to the at least one analytical unit (310). Next, the feedstock (300) is directed by the first distributing unit (330) to one specific of the at least two pre-treatment units (340a;340b) based on the determined value at least one physical and / or chemical property of the feedstock (300). The at least two pre-treatment units (340a;340b) are downstream of and fluidically connected to the first distributing unit (330).

[0073] In case the value of the determined property is read manually by e.g., an operator, the first distributing unit (330) is adjusted manually by e.g., an operator or the operator submits the value of the determined property to an optional control unit (320a) which sends a control signal to the data signal connected first distributing unit (330).

[0074] In case the syngas production plant comprises a control unit (320a), said control unit (320a) is preferably data signal connected to the first distributing unit (330) which receives a control signal for choosing one specific of the at least two pre-treatment units (340a;340b) after the control unit (320a) received the determined value of the at least one physical and / or chemical property of the feedstock (300) from the at least one analytical unit (310). Thereby, one specific of the at least two pre-treatment units (340a;340b) is selected by the first distributing unit (330) and a fluidically connection between the feedstock (300) and said one specific of the at least two pretreatment units (340a;340b) is established and the feedstock (300) is pre-treated according to the determined value of the at least one physical and / or chemical property of the feedstock (300). The first distributing unit (330) serves as a storage unit for the feedstock (300) and / or as a distributor which directs the feedstock (300) to one specific of the at least two pre-treatment units (340a;340b).

[0075] The pre-treated feedstock (350a;350b) then leaves the respective pre-treatment unit (340a;340b) in downstream direction.

[0076] The at least one analytical unit (310), the first distributing unit (330), the at least two pretreatment units (340a;340b) and the optional control system (320a) are part of a facility a which is installed in a first location. The first location is preferably a location where the feedstock is available and / or stored.

[0077] The at least one physical and / or chemical property of the feedstock (300) can also be determined with at least one analytical unit (310) at a different location.

[0078] The pre-treated feedstock (350a;350b) is then transported to a facility b which is installed in a second location. The first location and the second location are different from each other. Accordingly, there is no fluidic connection between the at least two pre-treatment units (340a;340b) and the at least two gasifiers (370a;370b) in facility b. Preferably, the second location where facility b is installed is a location where syngas is required a feedstock for the chemical industry and / or as a fuel.

[0079] The pre-treated feedstock (350a;350b) can be transported to facility b for example by ship, freight train, or truck. The feedstock (300) is preferably pre-treated with one or more of agglomeration such as pelletizing, briquetting and extrusion, and thermochemical such as pyrolysis, torrefaction to reduce the feedstock volume for transportation from facility a to facility b

[0080] Facility b further comprises a second distributing unit (360) and optionally a second control unit (320b). The second distributing unit (360) serves as a storage unit for the pre-treated feedstock (350a;350b) and / or as a distributor which directs the pre-treated feedstock (350a;350b) to one specific of the at least two gasifiers (370a;370b). The pre-treated feedstock (350a;350b) enters the second distributing unit (360) from which the pre-treated feedstock (350a;350b) is fed into one specific of the at least two gasifiers (370a;370b).

[0081] The at least two gasifiers (370a;370b) are downstream of and fluidically connected to the second distributing unit (360). The one specific gasifier of the at least two gasifiers (370a;370b) is selected by the optional second control unit (320b), based on the measured value of the at least one physical and / or chemical property of the feedstock (300) or manually by, e.g., an operator based on the determined value of the at least one physical and / or chemical property of the feedstock (300). The optional second control unit (320b) is preferably data signal connected to the at least one analytical unit (310) and / or the optional first control unit (320a) and sends a control signal to the second distributing unit (360). Based on said control signal, the second distributing unit (360) opens the fluidic connection to one specific of the at least two gasifiers (370a;370b).

[0082] Next, the pre-treated feedstock (350a;350b) is subjected to a gasification reaction in one specific of the at least two gasifiers (370a;370b) and a raw syngas stream (380a;380b) leaves the gasifier (370a;370b) in downstream direction.

[0083] The specific combination of one pre-treatment unit (340a;340b) and one gasifier (370a;370b) is selected by comparing the at least one physical and / or chemical property value which is determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator. In case the means for storing information is a database, said database can be implemented in one or both optional control units (320a;320b) or used by an operator to compare the at least one physical and / or chemical value which was determined with combinations suitable-pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties for feedstocks having said at least one physical and / or chemical value as a property.

[0084] The syngas production plant according to the present invention optionally further comprises a central syngas purification unit (390) which is downstream of and fl uidical ly connected to the at least two gasifiers (370a;370b). The raw syngas (380a;380b) enters the optional central syngas purification unit (390) in which impurities are removed from the raw syngas (380a;380b) and clean syngas (400) leaves the optional central syngas purification unit (390) in downstream direction.

[0085] Hence, the syngas production plant according to the second embodiment of the present invention (Figures 2 and 3) is separated in a facility a and a facility b with no fluidic connection between the two facilities a and b as described above, and which facility a and facility b are installed in a first location and in a second location, respectively.

[0086] The individual components of the syngas production plant according to the present invention will be described more in detail below. The description applies to all embodiments and aspects of embodiments of the present invention unless otherwise stated.

[0087] The feedstock (10;100;300) is preferably a solid and / or liquid material or mixture of materials which comprises organic compounds and / or organic polymers. Said organic compounds and / or organic polymers contain biobased (14C) carbon and / or carbon of fossil sources, e.g., from waste (“recycle content carbon”). The feedstock (10;100;300) may further contain impurities such as inorganic components and metallic components. Preferably, the feedstock (10;100;300) is a solid and / or liquid feedstock and is selected from the group comprising biomass, waste, mixtures thereof, and mixtures thereof with fossil feedstocks such as coal, oil, and natural gas.

[0088] The term “biomass” includes but is not limited to wood, wood pellets, wood chips, straw, lignocellulosic biomass, energy crops, and algae.

[0089] The term “waste” comprises fossil-based waste, biobased waste, and mixtures thereof. Examples for waste suitable as a feedstock are agricultural / farming residues such as wood processing residues, waste wood, logging residues, switch grass, discarded seed corn, corn stover and other crop residues, municipal solid waste (MSW), textiles, industrial waste, sewage sludge, plastic waste, packaging waste, shredder residues such as automotive shredder residues and mixtures thereof.

[0090] Preferably, the feedstock (10;100;300) is selected from the group comprising biomass, municipal solid waste (MSW), shredder residues such as car shredder residues, textiles, plastic waste, packaging waste, and mixtures thereof.

[0091] The feedstock (10;100;300) according to the present invention has varying physical and / or chemical properties, said physical and / or chemical properties are selected from the group comprising water content, ash content, elemental composition, particle size distribution, density, bulk density, and calorific value.

[0092] The variation (“varying”) of said physical and / or chemical properties cause for example an undesired variation of the temperature(s) inside a gasifier and / or an undesired variation of the molar ratio H2: CO in the raw syngas.

[0093] The at least one physical and / or chemical property of the feedstock are optionally determined by measurement with at least one analytical unit (11 ;110;310).

[0094] The at least one analytical unit can be part of the syngas production plant according of the present invention. The feedstock (10;100;300) is e.g., delivered to the syngas production plant or to the location a in case the syngas production plant is distributed over a location a and a location b as described above and the at least one physical and / or chemical property of the feedstock (10;100;300) is measured with at least one analytical unit (11 ; 110;310) there.

[0095] In another aspect of the present invention, the at one analytical unit (11 ; 110;310) is not part of the syngas production plant according to the present invention. Hence, the at least one physical and / or chemical property of the feedstock (10;100;300) is determined prior to transport of the feedstock (10;100;300) to the syngas production plant or location a of the syngas production plant. In this aspect, the at least one physical and / or chemical property of the feedstock (10;100;300) is for example measured at the location where the feedstock (10;100;300) is collected and / or where the feedstock (10;100;300) is stored prior to transportation to the syngas production plant.

[0096] In yet another aspect of the present invention, the at least one physical and / or chemical property of the feedstock (10;100;300) is measured “at-line” which means that the at least one analyti- cal unit (11 ;110;310) in this aspect of the present invention is installed e.g., next to a conveyor belt which transports the feedstock along the at least one analytical unit (11 ;110;310) to the distributing unit (13;130;300) and the at least one of the physical and / or chemical properties of the feedstock is optionally measured when the feedstock (10;100;300) passes the at least one analytical unit (11 ;110;310).

[0097] The syngas production plant according to the present invention optionally comprises at least one analytical unit (11 ;110;310). Each of the at least one analytical unit (11;110;310) comprises at least one analytical method for measuring at least one of the physical and / or chemical properties of the feedstock selected from the group comprising water content, ash content, elemental composition, particle size distribution, density, bulk density, and calorific value. In case the syngas production plant does not comprise at least one analytical unit (11 ;110;310), at least one of the physical and / or chemical properties of the feedstock selected from the group comprising water content, ash content, elemental composition, particle size distribution, density, bulk density, and calorific value was measured at another location and the measured value is made available for the synthesis gas production plant and the method for a continuous production of syngas by gasification of a feedstock, the feedstock having varying physical and / or chemical properties according to the present invention.

[0098] Analytical methods suitable for measurement of the water content of a feedstock comprise gravimetric methods, microwave transmission methods, microwave resonance methods, microwave absorption methods, radiometric moisture measurement methods, and NIR-spectroscopy.

[0099] Analytical methods suitable for measuring the ash content of a feedstock comprise gravimetric methods wherein a sample of the feedstock is completely burnt and the weight of the remaining amount of inorganic noncombustible material is determined. Such methods are for example suitable to identify inorganic components in the feedstock which are undesired for the gasification reaction.

[0100] Analytical methods suitable for measuring the elemental composition (such as the content of chemical elements H, C, O, N, S, and Cl) of a feedstock comprise CHNX analysis by combustion combined with thermal conductivity detection and / or infrared spectroscopy. Measurement of the contents of the chemical elements H, C, and O are suitable for estimating the expected syngas composition. Measurement of the contents of the chemical elements N, S, and Cl are suitable for estimating the expected amount and type of impurities in the syngas. Analytical methods suitable for measuring the calorific value of a feedstock comprise combustion of a feedstock sample in a bomb calorimeter. Such methods are for example suitable to assess the thermochemical behavior of a feedstock during the gasification reaction and, accordingly, the suitable type of gasifier and gasification process parameters such as temperature, amount, and type of oxidant.

[0101] Analytical methods suitable for measuring the particle size distribution of a feedstock comprise sieve grain size analysis. Such analytical methods are suitable to decide if the particle size distribution of the feedstock should be altered with a pre-treatment method such as crushing or grinding in a suitable pre-treatment unit and furthermore which type of gasifier is most suited for the given feedstock having a particular particle size distribution.

[0102] The result of the measured at least one of the physical and / or chemical properties of the feedstock (10;100;300) is either used to manually select a combination of one pre-treatment method and one gasifier (type) e.g., by an operator or preferably send as a data signal to an optional control unit which is data signal connected to the at least one analytical unit (11 ; 110;310).

[0103] The first distribution unit (13;130;330) and the second distributing unit (16;360) function as a storage unit for the feedstock (10;100;300) and / or as a distributor for distributing the feedstock (10;100;300) to one specific of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b) in case of the first distribution unit (13;130;330) and as a storage unit for the pre-treated feedstock (15a;15b;150a;150b;350a;350b) and / or as a distributor to one specific of the at least two gasifiers (17a;17b;370a;370b) in case of the second distribution unit (16;360).

[0104] For example, the feedstock (10;100;300) is transported by a conveyor belt to the first distribution unit (13;130;330) in which the feedstock (10;100;300) is either stored and after storage distributed to a second conveyor belt to feed the feedstock (10;100;300) into a first pre-treatment unit (140a;140a;340a) or distributed after storage to a third conveyor belt to feed the feedstock (10;100;300) into a second pre-treatment unit (14b;140b;340b), based on the measured value at least one physical and / or chemical property of the feedstock (10;100;300), or distributed to a second conveyor belt to feed the feedstock (10;100;300) into a first pre-treatment unit (140a;140a;340a) or distributed to a third conveyor belt to feed the feedstock (10;100;300) into a second pre-treatment unit (14b;140b;340b) without storage, the distribution based on the measured value at least one physical and / or chemical property of the feedstock (10;100;300). The first distribution unit (13;130;330) can be for example an intermediate storage such as a silo, flat bunker and / or underground bunker, optionally with equipped with a mixing unit, and / or conveyor systems such as a conveyor system comprising a first conveyor belt, a second conveyor belt and a third conveyor belt as described above.

[0105] For example, the pre-treated feedstock (15a;15b;150a;150b;350a;350b) is transferred from the exit opening of the one specific of the at least two pre-treatment units to a first conveyor belt and thereby transported to the second distribution unit (16;360) by which the pre-treated feedstock (15a;15b;150a;150b;350a;350b) is either distributed to a second conveyor belt to feed the pre-treated feedstock (15a;15b;150a;150b;350a;350b) into a first gasifier (17a;370a) or to a third conveyor belt to feed the pre-treated feedstock (15a;15b;150a;150b;350a;350b) into a second gasifier (17b;370b), based on the measured value at least one physical and / or chemical property of the feedstock (10;100;300).

[0106] The second distribution unit (16;360) can be for example an intermediate storage such as a silo, flat bunker and / or underground bunker, optionally with equipped with a mixing unit, and / or conveyor systems such as a conveyor system comprising a first conveyor belt, a second conveyor belt and a third conveyor belt as described above.

[0107] The second distributing unit is upstream of and fluidically connected to each of the at least two gasifiers (Figures 1 and 3) and optionally also downstream of and fluidically connected to each of the at least two pre-treatment units (Figure 1).

[0108] The syngas producing plant according to the present invention comprises at least two pretreatment units (14a;14b;140a;140b;340a;340b), wherein said pre-treatment units are different from each other. Each of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b) is suitable for providing at least one pre-treatment method. A suitable pre-treatment method or combination of pre-treatment methods in a pre-treatment unit should provide a sufficiently homogeneous carbon-based feedstock to the gasification reaction and likewise enable the continuous production of syngas by gasification of a feedstock, the feedstock having varying physical and / or chemical properties.

[0109] The suitable pre-treatment method for a given feedstock is selected manually by e.g., an operator or by an optional control unit (12;120;320a) after at least one of the physical and / or chemical properties of the feedstock was measured in the at least one analytical unit (11 ; 110;310). A suitable pre-treatment method or a combination of more than one pre-treatment methods in a pre-treatment unit (14a; 14b; 140a; 140b;340a;340b) results in a homogenization of the physical and / or chemical properties of the feedstock (10;100;300) and / or the requirement(s) for a specific type of gasifier (17a;17b;170a;170b;370a;370b) and / or the requirements for the optional at least one further chemical production unit for producing a chemical compound or mixture of chemical compounds.

[0110] The suitable pre-treatment method for a given feedstock (10;100;300) is then selected from the group comprising drying, comminution, classification, sorting, agglomeration, (thermo-)chemical methods, and biological methods.

[0111] Suitable drying methods comprise belt drying, fluidized bed drying, drum drying, spray drying, hearth drying, rotary tray drying, and radiation drying.

[0112] Suitable comminution methods comprise pressure, impact, shearing, grinding, milling, crushing, and cutting. Pre-treatment units suitable for size reduction by grinding a feedstock comprise rod mills and ball mills, closed circuited with a classifier unit. Milling is preferably performed wet. Accordingly, a grinding pre-treatment is preferably combined with a drying method in a single pre-treatment unit. Pre-treatment units suitable for size reduction by crushing a feedstock comprise jaw-crushers, gyratory crushers, and cone crushers. Crushing is preferably performed dry. Accordingly, a crushing pre-treatment is preferably combined with a drying method prior to crushing in a single pre-treatment unit.

[0113] Suitable classification methods comprise screening (e.g., revolving drum screens, surface screens, fixed and movable gratings), winnowing, flotation, zigzag classifier, and air table classification. Screening systems preferably comprise one or more of bar screens, wedge wire screens, radial sieves, banana screens, multi-deck screens, vibratory screens, fine screens, flip flop screens and wire mesh screens. Screens can be static, or they can incorporate mechanisms to shake or vibrate the screen(s).

[0114] Suitable sorting methods comprise manual sorting, pneumatic sorting, sensor-based sorting (e.g., NIR-assisted sorting, inductive-assisted sorting, and X-ray-assisted sorting), and metal separation (e.g., magnetic separation, eddy current separation).

[0115] Suitable agglomeration methods comprise pelletizing, briquetting, and extrusion. Such methods usually comprise a means for compressing the feedstock and optionally a further means for heating (“baking”) the compressed feedstock. Such pre-treatment methods often provide better physical characteristics than the initial feedstock, improve the transportability of the feedstock to e.g., another location such as from a facility a to a facility b (Figures 2 and 3), and improve the thermochemical behavior.

[0116] Suitable thermochemical methods comprise pyrolysis, converting the feedstock into char, and torrefaction. Pre-treatment units suitable for a thermochemical pre-treatment of feedstocks comprise pyrolysis reactors in which the feedstock is heated to e.g., 500 °C in an inert atmosphere to obtain a pyrolysis oil having an improved calorific value compared to the untreated feedstock and a reduced volume which improves the transportability of the feedstock to e.g., another location such as from a facility a to a facility b (Figures 2 and 3).

[0117] Suitable biological methods comprise fermentation such as anaerobic fermentation.

[0118] The suitable one or more pre-treatment method and the respective pre-treatment unit (14a;14b;140a;140b;340a;340b) depend on the at least one physical and / or chemical properties of the feedstock (10;100;300) which was / were measured by the at least one analytical unit (11 ;110;310) and on the type of gasifier in which the syngas is then produced from the pretreated feedstock.

[0119] In case a pre-treatment unit (14a;14b;140a;140b;340a;340b) is suitable for more than one pretreatment methods, combinations of drying / particle size reduction such as belt drying / grinding or drying / agglomeration such as drum drying / pelletizing or drying / thermochemical method such as belt drying / pyrolysis or thermochemical method / agglomeration such as torrefaction / pelletizing or comminution / drying such as crushing / belt drying can be applied as a pre-treatment method of the feedstock (10;100;300).

[0120] Another thermochemical pre-treatment method for feedstocks is torrefaction. Pre-treatment units suitable for torrefying a feedstock comprise a means for heating the feedstock in the temperature range of about 200 °C to about 320 °C. In case a feedstock consisting of biomass is subjected to a torrefaction, the resulting pre-treated feedstock is also referred to as “bio-coal”. The volume and water content of the feedstock are reduced, and the calorific value of the feedstock is increased by a (partial) chemical conversion of the feedstock.

[0121] The pre-treated feedstock (14a;14b;140a;140b;340a;340b) is then suited for the gasification reaction in one specific of the at least two gasifiers (17a;17b;170a;170b;370a;370b).

[0122] At least one physical and / or chemical property of the feedstock (10;100;300) is determined with at least one analytical unit (11 ; 110;310) and the result of the determined property is read manu- ally by e.g., an operator and transferred to the control unit (12;120;320) or automatically send from the at least one analytical unit (11 ;110;310) to the control unit (12;120;320) which is preferably data signal connected to the at least one analytical unit (11 ;110;310). Next, the feedstock (10;100;300) is distributed by the first distributing unit (13;130;330) to one specific of the at least two pre-treatment units (14a;14a;140a;140b;340a;340b) based on the determined at least one physical and / or chemical property of the feedstock (10;100;300). The at least two pre-treatment units (14a;14a;140a;140b;340a;340b) are downstream of and fluidically connected to the first distributing unit (13;130;330).

[0123] The control unit (12;120;320) is preferably data signal connected to the first distributing unit (13;130;330) which receives a control signal from the control unit (12;120;320) for choosing one specific of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b) after the control unit (12;120;320) received the determined value of the at least one physical and / or chemical property of the feedstock (10;100;300) from the at least one analytical unit (11 ;110;310) compared at least one physical and / or chemical property value of the feedstock with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator.

[0124] Thereby, one specific of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b) is selected by the first distributing unit (13;130;330) and the feedstock (10;100;300) and said selected one specific of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b) is fluidically connected with the first distributing unit (13;130;330). The feedstock (10; 110;310) is then transported to the selected pre-treatment unit and fed into said pre-treatment unit in which the feedstock (10;110;310) is pre-treated according to the determined value of the at least one physical and / or chemical property of the feedstock (10;110;310) and the respective entry in the means for storing information for a feedstock having said at least one physical and / or chemical property value. The first distributing unit (13;130;330) serves as a storage unit for the feedstock (10;110;310) and / or as a distributor which distributes the feedstock (10;110;310) to one specific of the at least two pre-treatment units (14a;14b;140a;140b;340a;340b).

[0125] The pre-treated feedstock (15a;15b;150a;150b;350a;350b) then leaves the respective pretreatment unit (14a;14b;140a;140b;340a;340b) and is directed by the second distributing unit (16;360) to the one of the at least two gasifiers (17a;17b;170a;170b;370a;370b) which was se- lected manually by an operator or by the optional control unit (12;120;320a;320b), in both cases based on the determined value of the at least one physical and / or chemical property of the feedstock (10; 110;310). In case the control system comprises a control unit (12;120;320a;320b), said control unit (12;120;320a;320b) is preferably data signal connected to the second distributing unit (16;360) which receives a control signal for choosing one of the at least two gasifiers (17a;17b;170a;170b;370a;370b) after the control unit (12;120;320a;320b) received the determined value of the at least one physical and / or chemical property of the feedstock (10; 110;310) from the at least one analytical unit (11 ;110;310).

[0126] The second distributing unit (16) is downstream of and fluidically connected to the at least two pre-treatment units (14a; 14b) and upstream of and fluidically connected to the at least two gasifiers (17a;17b). The second distributing unit (16) serves as a storage unit for the pre-treated feedstock (15a;15b;150a;150b;350a;350b) and / or as a distributor which directs the pre-treated feedstock (15a; 15b) to one of the at least two gasifiers (17a) or (17b).

[0127] Next, the pre-treated feedstock (15a;15b;150a;150b;350a;350b) is subjected to a gasification reaction in one specific of the at least two gasifiers (17a;17b;170a;170b;370a;370b) and a raw syngas stream (18a;18b;180a;180b;380a;380b) leaves the specific gasifier (17a;17b;170a;170b;370a;370b) in downstream direction.

[0128] The pre-treated feedstock (150a;150b;350a;350b) then leaves the selected pre-treatment unit of the at least two pre-treatment units (140a;140b;340a;340b) as a pre-treated feedstock (150a;150b;350a;350b) and is transported to a second location b.

[0129] At the second location b, the pre-treated feedstock (150a;150b) is fed into one specific of the at least two gasifiers (170a; 170b) which is selected based on the determined value of the at least one physical and / or chemical property of the feedstock (100) and comparison of said at least one physical and / or chemical value of the feedstock stored in a means for storing information in which suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties are stored in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator. At the second location b, the pre-treated feedstock (350a;350b) is fed into the second distributing unit (360) and directed by the second distributing unit (360) to the one specific of the at least two gasifiers (370a;370b) which was selected manually by an operator or by the optional control unit (320b). In both cases the selection is based on the determined value of the at least one physical and / or chemical property of the feedstock (300). In case the control system comprises a control unit (320a), said control unit (320a) is preferably data signal connected to the second distributing unit (320b) which receives a control signal from the control unit (320a) for choosing one specific of the at least two gasifiers (370a;370b) after the control unit (320a) received the determined value of the at least one physical and / or chemical property of the feedstock (300) from the at least one analytical unit (310) which was compared with corresponding value(s) stored in a means for storing information in which suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment meth- ods-suitable gasifier type for a continuous production of syngas having controlled properties are stored in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator.

[0130] The second distributing unit (360) is upstream of and fluidically connected to the at least two gasifiers (370a;370b). The second distributing unit (360) serves as a distributor which directs the pre-treated feedstock (350a;350b) to one specific of the at least two gasifiers (370a;370b).

[0131] Examples of suitable combinations of at least one physical and / or chemical property values-suitable pre-treatment methods are explained below:

[0132] In case the water content of a feedstock is too high, the preferred pre-treatment method for reducing the water content of the feedstock is drying.

[0133] In case the particle size of a feedstock is too large, the preferred pre-treatment method is selected from the group comprising grinding, shredding, milling, sieving and combinations thereof. In case the particle size of a feedstock is too small, the preferred pre-treatment for increasing the size of a feedstock is selected from the group comprising agglomeration, pelletizing, sieving, and combinations thereof. In case grinding is too energy consuming and / or in case a feedstock has a low grindability, the preferred pre-treatment method is selected from torrefaction, pyrolysis, and a combination of torrefaction and then pyrolysis of the torrefied feedstock.

[0134] In case the elemental composition of a feedstock is not suitable for gasification, the preferred pre-treatment method is selected from sorting, torrefaction, pyrolysis, and mixing said feedstock with at least one other feedstock having a suitable elemental composition for gasification. Examples for elemental compositions of a feedstock not suitable for gasification comprise a too high oxygen content and / or a too high nitrogen content.

[0135] In case the calorific value of a feedstock is too small, the preferred pre-treatment method is selected from torrefaction, pyrolysis, and mixing said feedstock with at least one other feedstock having a higher calorific value.

[0136] In case the ash content of a feedstock is too high (or too low), the preferred pre-treatment method is mixing said feedstock with at least one other feedstock having a lower (or higher) ash content.

[0137] The selection of gasifier type and gasifier size depends on physical and / or chemical properties of the feedstock, the physical and / or chemical properties preferably selected from the group comprising water content, ash content, elemental composition, size, and calorific value. The selection of gasifier type and gasifier size also depends on the pre-treatment method applied to the feedstock. An overview of gasifier types is for example provided in James G. Speight, Handbook of Gasification Technology, Scrivener Publishing and Wiley, 2020, chapter 8.4.2, pages 259 to 262.

[0138] The at least two gasifiers are preferably selected from the group comprising counter-current fixed bed reactors, co-current-fixed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors with the proviso that the at least two gasifiers are different from each other.

[0139] More preferably, the at least two gasifiers are selected from the group comprising bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors with the proviso that the at least two gasifiers are different from each other. Preferably combinations of pre-treatment methods and gasifier types comprise:

[0140] (i)screening and / or agglomeration with counter-current fixed bed reactors, co-current-fixed bed reactors;

[0141] (ii) crushing and / or shredding with bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors;

[0142] (iii) grinding with downdraft entrained flow reactors, updraft entrained flow reactors.

[0143] The gasification reaction in a gasifier is typically carried out at a temperature > 700 °C in the presence of a sub-stoichiometric amount of an oxidant such as oxygen, air, steam, supercritical water, CO2, or a mixture of the aforementioned. Oxygen is the most common oxidant used for gasification because of its easy availability and low cost. If steam acts as oxidant, the raw syngas has a higher first molar ratio H2 : CO than in case if oxygen is used as oxidant. For example, a the molar ratio “oxygen : oxygen required for a total oxidation of the feedstock” can range from 0.3 to < 1.

[0144] The conversion of a feedstock in one of the at least two gasifiers results in a raw syngas which consists primarily of H2, CO, CO2, methane, other hydrocarbons, and impurities. Said raw syngas has a first molar ratio H2: CO when leaving the gasifier which ranges from about 0.1 : 1 to about 3 : 1 and depends on the type of solid and / or liquid feedstock used, the oxidant and other reaction conditions applied such as temperature and / or residence time for the gasification reaction.

[0145] The pre-treated feedstock enters one specific of the gasifiers where it is converted into raw syngas. Said raw syngas is then preferably purified in an optional central syngas purification unit which is downstream of and fluidically connected to each of the at least two gasifiers and leaves said optional central syngas purification units as a clean syngas.

[0146] Typical impurities in the raw syngas obtained from the gasification reaction comprise chlorides, sulfur-containing organic compounds such as sulfur dioxide, trace heavy metals (e.g., as respective salts), tars / condensable hydrocarbons and particulate residues. Various chemical and / or physical methods for removal of such impurities from said raw syngas such as filtration, scrubbing, condensation and ab- / adsorption are known and can be chosen and adapted according to the type and respective concentration of the impurities in said raw syngas and the tolerance to such impurities in the successive process steps. Some selected methods for removal of impurities from said raw syngas will be discussed in more detail. One or more of said methods can also be implemented into the central syngas purification unit. However, this selection of methods is not limiting the scope of the present invention. Other gaseous substances such as HCI and H2S are formed and / or separated from the raw syngas in the central syngas purification unit. The impurities are removed from the raw syngas and a clean syngas having a first molar ratio H2: CO is obtained.

[0147] Particulate impurities can be removed from the raw syngas by a cyclone and / or filters, chlorides by wet scrubbing, trace heavy metals, catalytic hydrolysis for converting sulfur-containing organic compounds to H2S and acid gas removal for extracting sulfur-containing gases such as H2S. Bulky and (fine) particles in the syngas may also be removed with a quench in a soot water washing unit.

[0148] Particulate impurities can be optionally removed from the raw syngas directly by a cyclone and / or filters after the raw syngas leaves the gasifier. Hence, the removal of particles from the syngas can be part of a gasifier and / or part of the optional central syngas purification unit which is fluidically connected to each of the at least two gasifiers.

[0149] Fine particles can be optionally removed from the raw syngas directly with filters after the raw syngas leaves the gasifier. Hence, the removal of fine particles from the syngas can be part of a gasifier and / or part of the central syngas purification unit which is fluidically connected to each of the at least two gasifiers.

[0150] The optional central syngas purification unit is for example fluidically connected to the at least two gasifiers by a piping through which the raw syngas leaving the one specific of the at least two gasifiers is transported to and fed into the optional central syngas purification unit.

[0151] Preferably, clean syngas is obtained from the control system according to the present invention because catalysts utilized in successive process steps have an improved lifetime and maintain their activity when using a clean syngas instead of the raw syngas obtained directly from the gasification reaction.

[0152] The syngas producing plant according to the present invention optionally comprises a control unit which is preferably data signal connected to the at least one analytical unit. The optional control unit is preferably data signal connected to the first distributing unit. More preferably, the optional control unit is data signal connected to the at least one analytical unit and data signal connected to the first distributing unit. The optional control unit receives the at least one physical and / or chemical property of the feedstock which was for example determined by the at least one analytical unit. Next, the at least one physical and / or chemical property value determined is compared with a database which comprises suitable combinations of parameters of groups a), b) and c) which are stored in the optional control unit and wherein a) comprises physical and / or chemical property of feedstocks, said properties selected from the group comprising water content, ash content, elemental composition, size, and calorific value, b) one or more pre-treatment methods selected from the group comprising sorting, separation, mechanical size reduction, biological treatment, drying, torrefaction, grinding, shredding, milling, agglomeration, pelletizing, briquetting, and thermochemical methods, and c) the gasifier type which is selected from the group comprising counter-current fixed bed reactors, co-current-fixed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors, and is thereby selecting a specific combination of one specific pre-treatment unit from said at least two pre-treatment units and one specific gasifier from said at least two gasifiers which is most suited for a feedstock having the measured value of the at least one physical and / or chemical property and thereby enables the production of a continuous syngas stream having controlled properties such as the molar ratio H2 : CO, concentration of CO, H2, CH4, CO2, H2O, minimization of impurities (e.g., tars, H2S, HCN, NH3, dust).

[0153] The specific combination of one pre-treatment unit and one gasification reactor for a given feedstock is selected by comparing the at least one physical and / or chemical property value determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties. Said means for storing information can be for example a database, a sheet of paper comprising said information in written and / or printed form, or the knowledge of an operator or used by an operator to compare the determined at least one physical and / or chemical value with combinations suitable-pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties for feedstocks having said at least one physical and / or chemical value as a property. The invention further relates to a method, preferably according to the method described herein, comprising the step: converting the syngas obtainable by or obtained by the method as described herein or a chemical material obtainable by or obtained by the method as described herein to obtain a monomer, polymer or polymer product.

[0154] The invention further relates to a method comprising the step: using the syngas producing plant as described herein to obtain syngas, monomer, polymer or polymer product.

[0155] In a preferred embodiment, the monomer is a di- or polyol; preferably butandiol; aldehyde; preferably formaldehyde; di- or polyisocyanate; preferably methylene diphenyl diisocyanate (MDI), polymeric methylene diphenyl diisocyanate (pMDI), toluene diisocyanate (TDI), hexamethylenediisocyanate (HDI) or isophoronediisocyanate (IPDI); amide; preferably caprolactam; alkene; preferably styrene, ethene and norbornene; alkyne, (di)ester; preferably methyl methacrylate; mono or diacid; preferably adipic acid or terephthalic acid; diamine; preferably hexamethylenediamine, nonanediamine; or sulfones; preferably 4,4'-dichlorodiphenyl sulfone.

[0156] In a preferred embodiment, the polymer is and / or the polymer product comprises polyamide (PA); preferably PA 6 or PA 66; polyisocyanate polyaddition product; preferably polyurethane (Pll), thermoplastic polyurethane (TPU), polyurea or polyisocyanurate (PIR); low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinyl acetate (PVA), polystyrene (PS), poly acrylonitrile butadiene styrene (ABS), poly styrene acrylonitrile (SAN), poly acrylate styrene acrylonitrile (ASA), polytetrafluoroethylene (PTFE), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly(cis-1,4-isoprene), poly(trans-1 ,4-isoprene), polyoxymethylene (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polybutylene adipate co-terephthalate (PBAT), polyester (PES), polyether sulfone (PESLI), polyhydroxyalkanoate (PHA), poly-3-hydroxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), polylactic acid (PLA), polysulfone (PSU), polyphenylene sulfone (PPSLI), polycarbonate (PC), polyether ether ketone (PEEK), poly(p-phenylene oxide) (PPO), poly(p-phenylene ether) (PPE); or copolymer or mixture thereof.

[0157] In a preferred embodiment, the polymer and / or the polymer product is / are or is / are a part of: a part of a car; preferably cylinder head cover, engine cover, housing for charge air cooler, charge air cooler flap, intake pipe, intake manifold, connector, gear wheel, fan wheel, cool- ing water box, housing, housing part for heat exchanger, coolant cooler, charge air cooler, thermostat, water pump, radiator, fastening part, part of battery system for electromobility, dashboard, steering column switch, seat, headrest, center console, transmission component, door module, A, B, C or D pillar cover, spoiler, door handle, exterior mirror, windscreen wiper, windscreen wiper protection housing, decorative grill, cover strip, roof rail, window frame, sunroof frame, antenna panel, headlight and taillight, engine cover, cylinder head cover, intake manifold, airbag, cushion, or coating; a cloth; preferably shirt, trousers, pullover, boot, shoe, shoe sole, tight or jacket; an electrical part; preferably electrical or electronic passive or active component, circuit board, printed circuit board, housing component, foil, line, switch, plug, socket, distributor, relay, resistor, capacitor, inductor, bobbin, lamp, diode, LED, transistor, connector, regulator, integrated circuit (IC), processor, controller, memory, sensor, microswitch, microbutton, semiconductor, reflector housing for light-emitting diodes (LED), fastener for electrical or electronic component, spacer, bolt, strip, slide-in guide, screw, nut, film hinge, snap hook (snap-in), or spring tongue; a consumer, agricultural product or pharmaceutical product; preferably tennis string, climbing rope, bristle, brush, artificial grass, 3D printing filament, grass trimmer, zipper, hook and loop fastener, paper machine clothing, extrusion coating, fishing line, fishing net, offshore line and rope, vial, syringe, ampoule, bottle, sliding element, spindle nut, chain conveyor, plain bearing, roller, wheel, gear, roller, ring gear, screw and spring dampers, hose, pipeline, cable sheathing, socket, switch, cable tie, fan wheel, carpet, box or bottle for cosmetics, mattress, cushion, insulation, detergent, dishwasher tabs or powder, shampoo, body wash, shower gel, soap, fertilizer, fungicide, or pesticide; a packaging for the food industry; preferably mono- or multi-layer blown film, cast film (mono- or multi-layer), biaxially stretched film, or laminating film; or a part of a construction; preferably a rotor blade, insulating material, frame, housing, wall, coating, or separating wall.

[0158] In a preferred embodiment, the content of the feedstock in the pyrolysis oil, syngas, monomer, polymer or polymer product is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight- % or more; and / or the content of the feedstock in the pyrolysis oil, syngas, monomer, polymer or polymer product is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.

[0159] The converting step(s) to obtain the pyrolysis oil, syngas, monomer, polymer or polymer product may comprise one or more synthesis steps and can be performed by conventional synthesis and technics well known to a person skilled in the art. Independent of the person skilled in the art to assess novelty and inventive step of the independent claim(s), the person skilled in the art to perform the converting step(s) is preferably from the technical field(s) pyrolysis, gasification, remonomerization, depolymerization, synthesis, production of monomers, polymers and polymer compounds, and / or its further processing (e.g. extrusion, injection molding). Examples of the step(s) of the conversion is / are described in “Industrial Organic Chemistry”, 3. volume, Wiley- VCH, 1997, ISBN: 978-3-527-28838-0, „Kunststoffhandbuch“, 11 volumes in 17 subvolumes, Carl Hanser Verlag; especially volume 6, „Polyamide“, 1. edition, 1966, volume 7, ..Polyurethane", 3. edition, 1993, and volume 8, “Polyester”, 1. edition 1973; “Industrial Organic Chemistry”, 3. volume, Wiley-VCH, 1997, ISBN: 978-3-527-28838-0, “Injection Molding Reference Guide, 4th edition, CreateSpace Independent Publishing Platform, 2011 , ISBN: 978- 1466407824, EP0989146 (A1), EP1460094 (A1), W02006034800 (A1), EP1529792 (A1), W02006042674 (A1), EP0364854 (A2), US5506275 (A), EP0897402 (A1), WO2015082316 (A1), WO2021021855 (A1), WO2021126938 (A1), W02021021902 (A1), W02021092311 (A1), WO2008155271 (A1), WO2013139827 (A1), each of which is incorporated herein by reference.

[0160] The syngas producing plant and the method for a continuous production of syngas by gasification of a feedstock, the feedstock having varying physical and / or chemical properties according to the present invention is further explained by the non-limiting simulated example(s) below.

[0161] Example 1

[0162] A feedstock (10) is provided. The water-content and the particle size distribution of the feedstock (10) are determined gravimetrically and by sieve grain size analysis, respectively. The water-content measured is 45 wt.-% and the median particle size is greater than 150 mm.

[0163] The measured water-content and the particle size distribution values are sent from the analytical unit (11) to the data signal connected control unit (12) which compares said measured values with the database containing suitable combinations for a) Feedstocks having the measured water content and particle size distribution as physical and / or chemical feedstock properties, b) one or more pre-treatment methods selected from the group comprising drying, comminution, classification, sorting, agglomeration, thermochemical methods, and biological methods, and c) gasifier type selected from the group comprising counter-current fixed bed reactors, cocurrent-fixed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors.

[0164] The syngas producing plant comprises a first distribution unit (13) which comprises three conveyor belts, a pre-treatment unit (14a) for a combination of drying and grinding a feedstock and a second pre-treatment unit (14b) for a combination of torrefaction and pelletizing. The syngas producing plant further comprises a second distributing unit (16), a first gasifier (17a) which is a circulating fluidized bed gasifier and a second gasifier (17b) which is an entrained flow gasifier. The syngas producing plant further comprises a central syngas purification unit (19).

[0165] The feedstock at least one measured physical and / or chemical property (10a) is then loaded onto the first conveyor belt which is part of the first distribution unit (13). Based on the measured values for water content and particle size distribution of the feedstock (10;10a), the control unit (12) choses the pre-treatment unit comprising the pre-treatment methods drying and crushing to provide a pre-treated feedstock having a reduced water content and a reduced particle size distribution. A control signal is transferred from the control unit (12) to the data signal connected first distributing unit (13) which fluidically connects the first conveyor belt with the feedstock (10a) loaded thereon to a second conveyor belt on which the feedstock (10a) is transported to the first pre-treatment unit (14a) in which the water content of the feedstock (10a) is reduced to about 10 wt.-% by drying and the particle size distribution is reduced to about 5 mm (d50 value) by shredding. The pre-treated feedstock (15a) leaves the first pre-treatment unit (14a) and is transported on a third conveyor belt to the second distributing unit (16). The second distributing element (16) receives a control signal from the data signal connected control unit (12) and the pre-treated feedstock (15a) is transferred to a fourth conveyor belt on which the pre-treated feedstock (15a) is transported to the first gasifier (17b) which is a circulating fluidized bed gasifier type identified by the control unit (10) as the most suitable gasifier for the feedstock (10; 10a) having the water content and average particles size as measured with the analytical unit (11) which was the reduced in the first pre-treatment unit (14a) to about 10 wt.-% by drying and the particle size distribution is reduced to about 5 mm (d50 value) by grinding. The pre-treated feedstock (15a) is then converted into a desired continuous raw syngas stream (18a) having controlled properties such as a desired molar ratio H2: CO. Said raw syngas stream (18a) is purified in the central syngas purification unit (19) to a continuous clean syngas stream (20) having controlled properties such as a desired molar ratio H2: CO.

[0166] The desired continuous stream of syngas (18b) having controlled properties is then obtained by a gasification reaction in the second gasifier (17b).

[0167] Example 2

[0168] A feedstock (100a) is provided at a location a where also the first distributing unit (130) and pretreatment units (140a; 140b) are located. The gasifiers (170a; 170b) and the central syngas purification unit (190) are installed in location b. The calorific value of the feedstock (100a) is determined and then a specific combination of one pre-treatment unit from said at least two pretreatment units and one gasifier from said at least two gasifiers based on the at least one physical and / or chemical property determined is selected. Accordingly, the feedstock (100a) is pretreated in a pre-treatment unit (140a) by pyrolysis. The feedstock is converted by the pyrolysis reaction into pyrolysis oil and char which are combined to a pre-treated feedstock (150a) which is then transported by truck to location b where the pre-treated feedstock (150a) is fed, accordingly, into an entrained flow gasifier in which raw syngas (180a) is formed. Next, impurities in the raw syngas (180a) are removed in a central syngas purification unit (190) and the desired clean syngas stream (200) having controlled properties is then obtained.

Claims

Claims1. Syngas producing plant for a continuous production of syngas with controlled properties by gasification of a feedstock, the feedstock having varying physical and / or chemical properties, the syngas production plant comprising:(i) optionally, at least one analytical unit for measuring at least one physical and / or chemical property of said feedstock,(ii) at least two pre-treatment units, wherein said pre-treatment units are different from each other,(iii) a first distributing unit, wherein the first distributing unit is upstream of and fluidical ly connected to each of the at least two pre-treatment units, and(iv) at least two gasifiers, wherein said gasifiers are different from each other, and(v) an optional control unit which is receiving said at least one physical and / or chemical property automatically or manually which is measured by the optional at least one analytical unit or determined before and is thereby selecting a specific combination of one pre-treatment unit from said at least two pre-treatment units and one gasifier from said at least two gasifiers, further comprising a second distributing unit, wherein the second distributing unit is upstream of and fluidical ly connected to each of the at least two gasifiers and wherein the second distributing unit is optionally downstream of and fl uidical ly connected to each of the at least two pre-treatment units.

2. Syngas producing plant according to claim 1 wherein the at least two pre-treatment units are suitable for one or more pre-treatment method selected from the group comprising drying, comminution, classification, sorting, agglomeration, thermochemical methods, and biological methods.

3. Syngas producing plant according to any of claims 1 or 2 wherein the at least two gasifiers are selected from the group comprising counter-current fixed bed reactors, co-current-fixed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors with the proviso that the at least two gasifiers are different from each other.

4. Syngas producing plant according to any of claims 1 to 3 wherein the determined or measured physical and / or chemical property is selected from the group comprising water content, ash content, elemental composition, particle size distribution, and calorific value.

5. Syngas producing plant according to any of claims 1 to 4 wherein the first distributing unit is selected from the group comprising silo, flat bunker and / or underground bunker, optionally with equipped with a mixing unit, and / or conveyor systems.

6. Syngas producing plant according to any of claims 1 to 5 wherein the control unit is data signal connected to the optional at least one analytical unit and wherein the control unit is data signal connected to the first distributing unit.

7. Syngas producing plant according to any of claims 1 to 6 further comprises a central syngas purification unit, wherein said central purification unit is downstream of and fluidically connected to each of said at least two gasifiers.

8. Syngas producing plant according to any of claims 1 to 7 wherein the syngas producing plant consists of two facilities, wherein the first facility comprises the optional first control unit, the first distributing unit and the at least two pre-treatment units and wherein the second facility comprises the at least two gasifiers, an optional second distributing unit, and the optional central syngas purification facility.

9. Syngas producing plant according to any of claims 1 to 8 wherein the specific combination of one pre-treatment unit and one gasification reactor is selected by comparing the at least one physical and / or chemical property value which was determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property values-suitable pretreatment methods-suitable gasifier type for a continuous production of syngas having controlled properties.

10. A method for a continuous production of syngas by gasification of a feedstock, the feedstock having varying physical and / or chemical properties, the method comprising the steps(i) providing a feedstock having varying physical and / or chemical properties wherein at least one physical and / or chemical property of said feedstock is determined,(ii) providing at least two feedstock pre-treatment units, wherein said pre-treatment units are different from each other and wherein each of the at least two pre-treatment units is suitable for one or more pre-treatment methods, and at least two gasifiers, wherein said gasifiers are different from each other,(iii) selecting a specific combination of one pre-treatment unit from said at least two pretreatment units and one gasifier from said at least two gasifiers based on the at least one physical and / or chemical property determined in step (i), and(iv) continuously manufacture syngas having controlled properties from said feedstock in said specific combination of one pre-treatment unit and one gasifier.

11. Method according to claim 10 wherein the at least two pre-treatment methods are independently selected from the group comprising drying, comminution, classification, sorting, agglomeration, thermochemical methods, and biological methods with the proviso that the at least two pre-treatment methods are different from each other.

12. Method according to any of claims 10 or 11 wherein the at least two gasifiers are independently selected from the group comprising counter-current fixed bed reactors, cocurrent-fixed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, dual fluidized bed reactors, downdraft entrained flow reactors, and updraft entrained flow reactors with the proviso that the at least two at least two gasifiers are different from each other.

13. Method according to any of claims 10 to 12 wherein the at least one physical and / or chemical property of said feedstock determined in step (i) is selected from the group comprising water content, ash content, elemental composition, particle size distribution, and calorific value.

14. Method according to any of claims 10 to 13 wherein the specific combination of one pretreatment method and one gasification reactor is established by comparing the at least one feedstock physical and / or chemical property value which was determined with at least one physical and / or chemical property value stored in a means for storing information in which the at least one physical and / or chemical property value is related with suitable combinations of feedstocks having said at least one physical and / or chemical property val- ues-suitable pre-treatment methods-suitable gasifier type for a continuous production of syngas having controlled properties.

15. Method according to any one of the claims 10 to 14, comprising the step: converting the syngas obtainable by or obtained by the method according to any one of claims 11 to 15 or a chemical material obtainable by or obtained by the method according to any one of claims 11 to 15 to obtain a monomer, polymer or polymer product.

16. Method according to claim 15, wherein the monomer is a di- or polyol; preferably butandiol; aldehyde; preferably formaldehyde; di- or polyisocyanate; preferably methylene diphenyl diisocyanate (MDI), polymeric methylene diphenyl diisocyanate (pMDI), toluene diisocyanate (TDI), hexameth-ylenediisocyanate (HDI) or isophoronediisocyanate (IPDI); amide; preferably caprolactam; alkene; preferably styrene, ethene and norbornene; alkyne, (di)ester; preferably methyl methacrylate; mono or diacid; preferably adipic acid or terephthalic acid; diamine; preferably hexamethylenediamine, nonanediamine; or sulfones; preferably 4,4'-dichlorodiphenyl sulfone.

17. Method according to claim 15 or 16, wherein the polymer is and / or the polymer product comprises polyamide (PA); preferably PA 6 or PA 66; polyisocyanate polyaddition product; preferably polyurethane (Pll), thermoplastic polyurethane (TPU), polyurea or polyisocyanurate (PIR); low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinyl acetate (PVA), polystyrene (PS), poly acrylonitrile butadiene styrene (ABS), poly styrene acrylonitrile (SAN), poly acrylate styrene acrylonitrile (ASA), polytetrafluoroethylene (PTFE), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly(cis-1 ,4-isoprene), poly(trans-1 ,4- isoprene), polyoxymethylene (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polybutylene adipate co-terephthalate (PBAT), polyester (PES), polyether sulfone (PESLI), polyhydroxyalkanoate (PHA), poly-3-hydroxybutyrate (P3HB), poly- 4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), polylactic acid (PLA), polysulfone (PSU), polyphenylene sulfone (PPSLI), polycarbonate (PC), polyether ether ketone (PEEK), poly(p-phenylene oxide) (PPO), poly(p-phenylene ether) (PPE); or copolymer or mixture thereof.

18. Method according to any one of claims 15 to 17, wherein the polymer and / or the polymer product is / are or is / are a part of: a part of a car; preferably cylinder head cover, engine cover, housing for charge air cooler, charge air cooler flap, intake pipe, intake manifold, connector, gear wheel, fan wheel, cooling water box, housing, housing part for heat exchanger, coolant cooler, charge air cooler, thermostat, water pump, radiator, fastening part, part of battery system for electromobility, dashboard, steering column switch, seat, headrest, center console, transmission component, door module, A, B, C or D pillar cover, spoiler, door handle, exterior mirror, windscreen wiper, windscreen wiper protection housing, decorative grill, cover strip, roof rail, window frame, sunroof frame, antenna panel, headlight and taillight, engine cover, cylinder head cover, intake manifold, airbag, cushion, or coating; a cloth; preferably shirt, trousers, pullover, boot, shoe, shoe sole, tight or jacket;an electrical part; preferably electrical or electronic passive or active component, circuit board, printed circuit board, housing component, foil, line, switch, plug, socket, distributor, relay, resistor, capacitor, inductor, bobbin, lamp, diode, LED, transistor, connector, regulator, integrated circuit (IC), processor, controller, memory, sensor, microswitch, microbutton, semiconductor, reflector housing for light-emitting diodes (LED), fastener for electrical or electronic component, spacer, bolt, strip, slide-in guide, screw, nut, film hinge, snap hook (snap-in), or spring tongue; a consumer, agricultural product or pharmaceutical product; preferably tennis string, climbing rope, bristle, brush, artificial grass, 3D printing filament, grass trimmer, zipper, hook and loop fastener, paper machine clothing, extrusion coating, fishing line, fishing net, offshore line and rope, vial, syringe, ampoule, bottle, sliding element, spindle nut, chain conveyor, plain bearing, roller, wheel, gear, roller, ring gear, screw and spring dampers, hose, pipeline, cable sheathing, socket, switch, cable tie, fan wheel, carpet, box or bottle for cosmetics, mattress, cushion, insulation, detergent, dishwasher tabs or powder, shampoo, body wash, shower gel, soap, fertilizer, fungicide, or pesticide; a packaging for the food industry; preferably mono- or multi-layer blown film, cast film (mono- or multi-layer), biaxially stretched film, or laminating film; or a part of a construction; preferably a rotor blade, insulating material, frame, housing, wall, coating, or separating wall.

19. Method according to any one of claims 15 to 18, wherein the content of the feedstock in the syngas, monomer, polymer or polymer product is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of the feedstock in the pyrolysis oil, syngas, monomer, polymer or polymer product is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.

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