Method for producing synthesis gas

Abstract

The present invention relates to a method for producing synthesis gas from carbonaceous treatment materials, comprising the following steps: To produce a carbon material, the carbonaceous treatment material is subjected to a first temperature in the range of 100 to 400°C and 20 to 50 atm (2.027 × 10⁻¹⁰ 6 Pa~5.066×10 6 a) A step of subjecting the carbon material produced in step a) to hydrothermal carbonization at a pressure of Pa; b) A step of producing the synthesis gas by gasifying the carbon material produced in step a) at a second temperature within a set range of 800 to 1500°C using an electric heater.

Description

Technical Field

[0001] The present invention relates to a method for producing syngas. In particular, the present invention relates to a method for producing syngas from a carbonaceous processing material.

Background Art

[0002] Syngas is a gas containing various gaseous substances usable in chemical synthesis at various ratios. Syngas, also called synthesis gas, is in particular a flammable gas containing hydrogen that can be used for chemical synthesis, and can be used, for example, for the synthesis and production of methanol, or for use in the Fischer-Tropsch process. Syngas can also be used as a gaseous fuel.

[0003] Syngas can be produced by various methods. One route for producing syngas is gasification of natural or synthetic charcoal accompanied by addition of water vapor and oxygen. In the terminology of the present invention, the term "charcoal" preferably includes synthetic charcoal produced from a carbonaceous processing material via a synthetic route through a carbonization process. This charcoal can then be converted into a syngas mixture of carbon monoxide and hydrogen, for example, using oxygen from partial oxidation and gasification with water vapor.

[0004] Furthermore, syngas can be produced from natural gas or petroleum by steam reforming. Hydrocarbons are converted here together with water vapor under pressure and at relatively high temperatures into carbon monoxide and hydrogen.

[0005] EP4121496A1 also describes the use of biomass to produce synthesis gas by biomass gasification. Because biomass has a relatively non-homogeneous composition and may contain undesirable substances such as sulfur (compounds) depending on the biomass composition used for synthesis gas production, the synthesis gas thus produced is fermented into ethanol using certain microorganisms less sensitive to these undesirable substances than, for example, a catalyst. This method is more advantageous from a climate and environmental protection standpoint than the aforementioned methods for producing synthesis gas, as it uses biomass that would otherwise be discarded, especially since the reserves of charcoal, natural gas, and petroleum are finite. However, this method is complex and time-consuming. Nevertheless, there remains a need for a method to produce synthesis gas that is climatically and environmentally mild, while also being more time- and cost-efficient. The use of non-fossil-derived carbonaceous processing materials results in a particularly positive CO2 balance, firstly because the synthesis gas is used, for example, to produce fuel which is then burned, and secondly because, unlike existing methods, the carbonaceous processing materials are not burned while generating CO2.

[0006] Furthermore, DE102009055976A1 describes an apparatus and method for producing carbon monoxide and hydrogen-rich, tar-free, low-methane synthesis gas from biomass by air-bed gasification. The method involves producing charcoal using biomass and using the charcoal as fuel for the production of synthesis gas, the biomass used here may be wood, waste wood, plant waste, grass, agricultural products and biological waste (including straw and residues from biomass processing). The charcoal is gasified with a combustible liquid or crushed and then gasified. [Overview of the project] [Problems that the invention aims to solve]

[0007] The object of the present invention is to provide a method for producing synthesis gas that is found to be climatically and environmentally mild and relatively advantageous in terms of time and cost. [Means for solving the problem]

[0008] The present invention relates to a method for producing synthesis gas from carbonaceous treated materials, comprising the following steps: a) To produce charcoal, carbonaceous material is subjected to a first temperature in the range of 100-400°C and 20-50 atm (2.027 × 10⁻¹⁰°F). 6 Pa~5.066×10 6 A process of hydrothermal carbonization under a pressure of Pa; b) A step to produce synthesis gas, wherein the charcoal produced in step a) is gasified at a second temperature using an electric heater to generate a second temperature in the range of 800 to 1500°C, and CO2 is used as the gasifying agent.

[0009] The method of the present invention allows for the efficient use of carbonaceous treated materials in terms of cost and time, eliminating the need for incineration or other disposal methods that increase CO2 emissions into the atmosphere. In hydrothermal carbonization, the carbonaceous treated material is carbonized into charcoal at a first temperature and pressure, and nutrient-rich process water is obtained as a further product, which can also be used for further purposes. An electric heater is provided to supply energy to the reactor in which step b) is carried out. The reactor can be heated in step b) by, for example, resistance heating or induction heating.

[0010] In a preferred embodiment, the method of the present invention further comprises the following steps: c) To produce further charcoal, optionally, a further carbonaceous treated material different from the carbonaceous treated material is subjected to a third temperature in the range of 100-400°C and 20-50 atm (2.027 × 10⁻¹⁰). 6 Pa~5.066×10 6 A process of hydrothermal carbonization under a pressure of Pa; d) To produce further synthesis gas, the further charcoal or further carbonaceous treated material produced in step c) is gasified at a fourth temperature using a further electric heater to generate a fourth temperature in the range of 700-1500°C, separately from step b), and CO2 is used as a further gasifying agent; and e) A step of combining the synthesis gas obtained in step b) with the further synthesis gas obtained in step d) in order to obtain synthesis gas.

[0011] The method of the present invention allows for the separate and efficient use of carbonaceous treated materials and further carbonaceous treated materials in terms of cost and time, eliminating the need for incineration or other disposal methods that increase CO2 emissions into the atmosphere. In the hydrothermal carbonization in steps a) and c), various carbonaceous treated materials are carbonized into charcoal and further charcoal, and nutrient-rich process water is obtained as a further product, which can be reused separately for further purposes. The resulting process water may contain different nutrients and / or contaminants at different concentrations. In the gasification described in steps b) and d), charcoal and further charcoal or carbonaceous treated materials are gasified separately, forming synthesis gas and further synthesis gas, as well as further ash, which can be reused separately for further purposes. The ash produced by gasification may contain different nutrients and / or contaminants at different concentrations. In particular, the present invention is based on the fundamental idea that the method of the present invention produces synthesis gas of uniform quality and properties regardless of the type of carbonaceous treated material used, depending on the type of carbonaceous treated material used. However, the further products formed in the form of process water and ash in the method of the present invention may have quality and properties that depend on the type of carbonaceous processing material. Therefore, it should be possible to use them separately for further applications.

[0012] Steps b) and d) may be carried out at different times or in parallel. The carbonaceous treatment material and the further carbonaceous treatment material may be different from each other, but the gasifier and the further gasifier may be the same or different. The carbonaceous treatment material and the further carbonaceous treatment material may be different in that they differ in at least one characteristic, namely the type of treatment material collected separately for treatment. Different characteristics or types of treatment materials may include sewage sludge, biomass, paper waste, or plastic waste.

[0013] This method is suitable for both dry and wet processing materials, and water may be added in steps a) and / or c) as needed. Therefore, it is not necessary to dry the carbonaceous processing material before step a) or to dry any further carbonaceous processing material before step c). Instead, each can be used as is. The charcoal obtained after step a) and the further charcoal obtained after step c) contains little water after subsequent dehydration and is suitable for direct use in step b) or d). For example, the charcoal obtained in step a) and / or the further charcoal obtained in step c) can be dehydrated to a predetermined dry solids content (e.g., 65% to 70% by weight) between steps a) and b) or between steps c) and d), for example by a filter press, and optionally dried using heat. By converting the carbonaceous processing material into charcoal, step b) uses a reactant that has a higher energy density than the carbonaceous processing material and is easier to transport to the synthesis gas plant than the carbonaceous processing material.

[0014] For the purposes of this invention, the term “processed material” means a reusable used material that is intended to be processed. The term “processed” means to enhance, open up, or utilize a material for further use or utilization, resulting in the material being reused or made available again.

[0015] In a preferred embodiment, the first and / or third temperatures are in the range of 150 to 350°C, more preferably 200 to 300°C. These temperatures are sufficient for carrying out step a).

[0016] The second temperature is preferably in the range of 900 to 1400°C, more preferably in the range of 1000 to 1300°C. Step b) is carried out particularly efficiently in this temperature range.

[0017] In a preferred embodiment, the gasifier and / or further gasifier essentially has 100% by volume of CO2, i.e., is essentially composed of CO2. Therefore, the gasifier having an oxidizing effect on the charcoal obtained in step a) is essentially CO2. The same applies to the further gasifier. This is the most preferred case, but for technical reasons, CO2 often contains impurities such as H2O and / or O2. Therefore, the gasifier and / or further gasifier may have a proportion of CO2 and a proportion of H2O and / or O2 less than the proportion of CO2. CO2 may contain small amounts of H2O or O2 that constitute technical impurities that are undesirable but not always avoidable in the method of the present invention. Therefore, for technical reasons, the gasifier and / or further gasifier may also have a mixture of 70% to 99% by volume of CO2 and 1% to 30% by volume of H2O and / or O2, or a mixture of 80% to 98% by volume of CO2 and 2% to 20% by volume of H2O and / or O2. In step b), CO2 reacts with charcoal to produce CO. Therefore, the carbon in the CO contained in the synthesis gas also originates from CO2, i.e., the gasifying agent. Furthermore, the charcoal reacts with H2O to produce CO and H2. Similarly, in step d), CO2 reacts with further charcoal to produce CO, and further charcoal reacts with H2O to produce CO and H2. H2O is preferably used in the form of water vapor in steps b) and d).

[0018] In a preferred embodiment, the carbonaceous treated material and / or further carbonaceous treated material is supplemented with a carbon source as an additive in step a). For the purposes of the present invention, the term “carbon source” means a substance having a carbon content of more than 80% by weight, more preferably 85% by weight, and even more preferably 90% by weight. By this method, the carbonaceous treated material used in step a) or the further carbonaceous treated material used in the optional step c) can be enriched with carbon.

[0019] The carbonaceous treated material can be used in a crushed or uncrushed form in step a). The same applies to further carbonaceous treated materials in steps c) and d). Preferably, the carbonaceous treated material and / or further carbonaceous treated material includes compostable materials. Compostable materials preferably include agricultural waste, food waste, animal waste, slaughterhouse waste, commercial waste, municipal waste and / or industrial waste. Agricultural waste, food waste, animal waste and / or slaughterhouse waste include both recoverable plant and / or animal parts, i.e., including not only fibrous parts but also liquid components, and also including tendons, bones and skin parts of plants or animals (including fish). Commercial waste, municipal waste and / or industrial waste may include, for example, cardboard, paper, liquid fertilizer, public waste, paper mill residues (such as paper mill sludge), and liquid and / or compostable plastics used in paper mills. Carbonaceous processing materials and further carbonaceous processing materials differ from each other in at least one characteristic, namely, the type of processing material that is collected separately for processing, even if both contain a compostable mass. For example, agricultural waste and food waste are collected together for processing, while compostable plastic waste and paper waste are collected separately for processing.

[0020] In a preferred embodiment, the carbonaceous treated material and / or further carbonaceous treated material comprises biomass. Biomass is the totality of organic matter produced or generated by plants or animals, and the term “biomass” means the mass of matter in living organisms and / or parts of their bodies or plant parts. The biomass is preferably derived from dead and / or removed plant parts (such as leaves, lateral branches, twigs and branches, foliage, pollen, sperm, ungerminated plant spores and / or seeds, fruits, flowers, roots or parts thereof, fallen leaves, whole dead plants and / or dead wood), and / or derived from dead and / or removed body parts (such as hair, fur, feathers, scales, bones, hooves, horns, bristles, fish bones, tendons, cartilage, skin, viscera, molted exoskeletons, pupal shells, cocoon remnants, eggs, eggshells, carcasses or parts thereof, animal excrement such as feces). Furthermore, usable biomass may include kitchen waste and other food waste.

[0021] For example, in the case of plant-based processed materials, the carbonaceous processed material or further carbonaceous processed material may include parts or all of the plant. If the carbonaceous processed material or further carbonaceous processed material includes sugar beets, it may include, for example, the beet body, beet chunks, roots, leaves, seeds, flowers and / or parts thereof, and may include, for example, the extracted beet pulp, syrup and / or molasses.

[0022] In the case of animal-derived processed materials, the carbonaceous processed material or further carbonaceous processed material may include, for example, parts or all of the animal's body. If the carbonaceous processed material includes bovine waste, it may include, for example, cartilage, tendons, udder, horns, meat, adipose tissue, hooves, eyes, bone marrow and / or parts thereof.

[0023] The carbonaceous treatment material and / or the further carbonaceous treatment material preferably comprises at least one component selected from the group consisting of sewage sludge, wood, agricultural waste, vegetable waste, grass and shrub clippings, plants, straw, silage, food waste, animal waste and slaughterhouse waste, paper sludge and / or press cake and / or plastic waste, wherein these are selected to be different from each other. These wastes have a carbon content that is beneficial for the present method. Agricultural waste preferably originates primarily from agriculture and horticulture, and includes agricultural waste (such as vegetable residues) comprising all parts of agricultural crops. Food waste includes raw and / or cooked kitchen waste and food waste of vegetable and / or animal origin. Animal waste and slaughterhouse waste include kitchen waste, food waste and other animal-derived food waste, and all parts of animals including marine animals such as fish.

[0024] The carbonaceous treatment material preferably comprises sewage sludge. The sewage sludge is preferably dewatered sewage sludge and / or dried sewage sludge. The advantages of dewatered sewage sludge and / or dried sewage sludge are the reduction in the volume and weight of the sewage sludge, and improved transportability and meterability.

[0025] In a preferred embodiment, the method comprises steps a), b), d), and optionally c), wherein the carbonaceous treatment material comprises or consists of sewage sludge, and the further carbonaceous treatment material does not comprise sewage sludge. The ash obtained after step b) has a very low pollutant content and, for example, contains a considerable amount of phosphorus, so that it can be used, for example, as a fertilizer without further treatment. The further ash can then be sent separately for further uses.

[0026] In a preferred embodiment, the method comprises steps a), b), and d), wherein the carbonaceous treated material does not contain plastic waste, and the further carbonaceous treated material contains or consists of plastic waste. The fourth temperature is preferably in the range of 700 to 1000°C, more preferably in the range of 700 to 900°C. Step d) is carried out spatially separately from step b). Steps b) and d) are carried out independently in different reactors and are spatially separated.

[0027] By spatially and physically separating the gasification of the carbonaceous treated material and the further treated material, including plastic waste, the ash and further ash obtained in addition to the synthesis gas and further synthesis gas in steps b) and d) have different compositions and are provided in a more targeted manner for further applications. Furthermore, since the plastic waste is gasified at a lower temperature without prior hydrothermal carbonization, costs and energy can be saved. In addition, the composition of the synthesis gas can also be controlled by controlling the mixing ratio of the synthesis gas obtained in step b) and the further synthesis gas obtained in step d) according to the desired carbon monoxide and hydrogen content.

[0028] The ash produced in steps b) and d) may contain different components, such as nutrients and / or contaminants, at different concentrations. While steps b) and d) are based on the fundamental idea that this method produces synthesis gas with quality and properties independent of the type of carbonaceous material used and further carbonaceous material, depending on the type of carbonaceous material used and further carbonaceous material including plastic waste, the further products formed in the form of ash and further ash in steps b) and d) may have quality and properties that depend on the type of carbonaceous material used and further carbonaceous material, and therefore should be able to be repurposed separately for further uses.

[0029] Preferably, each of steps a), b), c), and d) of the method is carried out in a reactor assigned to it. Preferably, step a) is carried out in a first reactor, step b) in a second reactor, optional step d) in an optional third reactor, and optional step c) in an optional fourth reactor. Steps a) and b) are preferably carried out in a plant series including a first reactor and a second reactor. Steps c) and d) are carried out in a further plant series including a third reactor and optionally a fourth reactor, if present, and these two plant series are combined to integrate the resulting synthesis gas to obtain synthesis gas, which can then be stored and / or further processed. However, the ash formed in the two plant series is preferably not combined but removed separately and stored or used for further purposes.

[0030] Preferably, the carbonaceous treatment material is used in step a) as a mixture of two different carbonaceous treatment materials having different carbon content, water content, and / or dry solids content. In this way, the carbon content, water content, and / or dry solids content levels of the treatment material used in step a) can be set. This allows the composition of the synthesis gas obtained in step b) to be controlled in terms of the molar ratio of CO to H2. For example, in step a) a carbonaceous treatment material with a relatively high carbon content can be added as a further carbon source for the recovery and utilization of a carbonaceous treatment material with a relatively low carbon content. Preferably, the carbonaceous treatment material includes a mixture of sewage sludge and wood. The wood serves as a good catalyst for the carbonization carried out in step a). Further carbonaceous treatment material can also be used in step c) or d) as a mixture of two different carbonaceous treatment materials having different carbon content, water content, and / or dry solids content. However, even in that case, the carbonaceous treatment material and the further carbonaceous treatment material still differ from each other in that one does not contain the same type or variety as the other.

[0031] In preferred embodiments, the carbonaceous treated material and / or further carbonaceous treated material has a potassium content in the range of 0% to 2.3% by weight, as measured in accordance with DIN 38406-13. Preferably, the carbonaceous treated material and / or further carbonaceous treated material has a calcium content in the range of 0% to 8% by weight, as measured in accordance with DIN 11876:2010-12. These content levels have a favorable effect on the production of optimized synthesis gas.

[0032] Preferably, the carbonaceous treated material and / or further carbonaceous treated material have a carbon content of 35% to 77% by weight, more preferably 35% to 50% by weight, as measured in accordance with DIN 16948:2015-09. Within this range, the method can be carried out in a particularly efficient manner.

[0033] Preferably, the carbonaceous treated material and / or further carbonaceous treated material have a water content in the range of 50% to 80% by weight, as measured in accordance with DIN 18134-1:2022. The carbonaceous treated material may optionally be dried for use in step a). Further carbonaceous treated material may also optionally be dried before use in step c) or d).

[0034] The synthesis gas produced in step b), the further synthesis gas produced in step d), and / or the synthesis gas combined in step e) preferably contains CO and H2. In step b), the following reaction preferably occurs: C + CO2 → 2CO (1) C + H2O → CO + H2(2)

[0035] In reaction equation (2), water, which is shown as a reactant, can be supplied, for example, as water vapor.

[0036] Preferably, the ratio of CO to H2 is in the range of 1:3 to 30:1, more preferably in the range of 1:2 to 25:1. These ratios can be easily achieved by this method. By selecting carbonaceous treated materials and optionally further carbonaceous treated materials, the composition of the synthesis gas can be controlled according to the desired carbon monoxide and hydrogen content. The composition of the synthesis gas contains different proportions of CO and H2 depending on the type or composition of the carbonaceous treated materials.

[0037] In a preferred embodiment, the electric heater is operated using surplus power during steps b) and / or d). Preferably, the surplus power is generated from renewable energy sources and is not needed in accordance with the current demand from consumers connected to the power grid, and therefore must be stored or used alternatively for the Method. The surplus power can be supplied to the Method from, for example, a wind power plant or a solar power plant, eliminating the need to use fossil fuels to produce the necessary power. For the purposes of the present invention, surplus power is power that is produced in excess or in excess of the required amount at a given time and cannot be consumed by other power consumers. Step a), and step c), if present, can also be operated using surplus power.

[0038] Further characteristics and advantages of the present invention will be described in relation to preferred embodiments, which will be described in detail with reference to the following drawings and embodiments. [Brief explanation of the drawing]

[0039] [Figure 1] A flowchart of the method of the present invention according to the first embodiment is shown. [Figure 2] A schematic diagram of a plant in which the method according to the second embodiment is implemented is shown. [Figure 3] A schematic diagram of a further plant in which the method according to the third embodiment is implemented is shown. [Modes for carrying out the invention]

[0040] Figure 1 shows a flow chart of the method according to the first embodiment. This method has step a), in which a) carbonaceous treatment material (e.g., sewage sludge) is subjected to a first temperature in the range of 100 to 400°C and 20 to 50 atm (2.027 × 10⁻¹⁰°C) in order to produce charcoal. 6 Pa~5.066×10 6 The charcoal is subjected to hydrothermal carbonization at a pressure of Pa). Following step a), there is step b), in which the charcoal produced in step a) is gasified at a second temperature in the range of 800 to 1500°C using CO2 as a gasifying agent to produce synthesis gas.

[0041] Figure 2 shows a schematic diagram of a plant in which the method according to the second embodiment is carried out. This plant has a first reactor 1, a second reactor 2, and a third reactor 3.

[0042] The method according to the second embodiment has the following steps: The carbonaceous treatment material 5 is supplied to the first reactor 1 as indicated by the arrow, and in the first reactor 1, it is subjected to hydrothermal carbonization at a temperature in the range of 100 to 400°C and a pressure of 20 to 50 atm to produce charcoal 9. This also produces process water 7, which is discharged from the first reactor 1 separately from the charcoal 9 as indicated by the arrow.

[0043] Charcoal 9 produced in the first reactor 1 is supplied to the second reactor 2 as indicated by the arrow. Also, as indicated by the arrow, a gasifying agent 11 and optionally steam (not shown) are supplied to the second reactor 2. In the second reactor 2, the charcoal 9 is gasified at a temperature in the range of 800 to 1500°C using an electric heater (not shown) and CO2 as the gasifying agent 11, producing synthesis gas 15 which is discharged from the second reactor 2 as indicated by the arrow. Ash 13 is also produced and discharged from the second reactor 2 separately from the synthesis gas 15 as indicated by the arrow.

[0044] In addition, a further carbonaceous treatment material 6, which is different from the carbonaceous treatment material, and a further gasifying agent 12 as indicated by the arrow, as well as optionally steam (not shown), are supplied to the third reactor 3. The further carbonaceous treatment material 6 is gasified in the third reactor 3 using an electric heater (not shown) and CO2 as the further gasifying agent 12 at a temperature in the range of 700 to 1500°C, so that the gasification of the further carbonaceous treatment material is carried out separately from the gasification of charcoal 9, and further synthesis gas 16 is produced which is discharged from the third reactor 3 as indicated by the arrow. This also produces further ash 14 which is discharged from the third reactor 3 separately from the synthesis gas 16 as indicated by the arrow.

[0045] Synthesis gas 15 discharged from the second reactor 2 and further synthesis gas 16 discharged from the third reactor 3 are combined to obtain synthesis gas 17. The ash 13 and further ash 14 are not combined but are used separately for further purposes.

[0046] Figure 3 shows a schematic diagram of a further plant in which the method according to the third embodiment is implemented. This plant corresponds to the plant shown in Figure 2, except that it further has a fourth reactor 4.

[0047] The method according to the third embodiment corresponds to the method according to the second embodiment, except that a further carbonaceous treatment material 6, different from the carbonaceous treatment material 5, is supplied to the fourth reactor 4 as indicated by the arrow, and subjected to hydrothermal carbonization in the fourth reactor 4 at a temperature in the range of 100 to 400°C and a pressure of 20 to 50 atm, and that the further carbonaceous treatment material 6 is subjected to hydrothermal carbonization separately from the carbonaceous treatment material 5 to produce further charcoal 10 separately from the charcoal 9. This also produces further process water 8, which is discharged from the fourth reactor 4 separately from the further charcoal 10 as indicated by the arrow. The further charcoal 10 is supplied to the third reactor 3 and subjected to gasification according to the second embodiment. [Examples]

[0048] Fifty tons of biomass with a carbon content of 45% by weight were subjected to hydrothermal carbonization at a first temperature of 250°C and a pressure of 35 atm for an appropriate period of time. Hydrothermal carbonization yielded charcoal and process water as products, which were separated from each other by filtration. The charcoal was optionally further dried. The charcoal produced from hydrothermal carbonization was then gasified at a second temperature of 1200°C using CO2 as a gasifying agent, during which up to 30% by volume of water vapor relative to the CO2 was optionally added. Gasification produced CO and H2-containing synthesis gas with a CO to H2 ratio of 20:1. [Explanation of Symbols]

[0049] 1. First reactor 2. Second reactor 3. Third reactor 4. Fourth reactor 5. Carbonaceous treated materials 6. Further carbonaceous treated materials 7. Wastewater 8. Further wastewater 9 charcoal 10 More charcoal 11. Gasifying agent 12 Further gasifying agents 13 Ash 14 More Ash 15 Synthesis gas 16 Further synthesis gas 17 Synthesis gas

Claims

1. A method for producing synthesis gas from carbonaceous processing materials, comprising the following steps: a) To produce charcoal, the carbonaceous treatment material is subjected to a first temperature in the range of 100 to 400°C and 20 to 50 atm (2.027 × 10⁻¹⁰ 6 Pa~5.066×10 6 A process of hydrothermal carbonization under a pressure of Pa; b) To produce the synthesis gas, the charcoal produced in step a) is heated using an electric heater to generate a second temperature in the range of 800 to 1500°C, and CO2 is used as a gasifying agent. 2 A step of gasifying at the second temperature using the above method.

2. A method according to claim 1, characterized in that the method further comprises the following steps: c) In order to produce further charcoal (10), optionally, a further carbonaceous treatment material (6) different from the carbonaceous treatment material (5) is prepared separately from the carbonaceous treatment material (5) at a third temperature in the range of 100 to 400°C and at 20 to 50 atm (2.027 × 10⁻¹⁰). 6 Pa~5.066×10 6 A process of hydrothermal carbonization under a pressure of Pa; d) To produce further synthesis gas (16), separately from step b), further charcoal (10) or further carbonaceous treatment material (6) produced in step c) is heated using a further electric heater to generate a fourth temperature in the range of 700 to 1500°C, and CO as a further gasifying agent (12). 2 A step of gasifying at the fourth temperature using the above-mentioned method; e) A step of combining the synthesis gas (15) obtained in step b) and the further synthesis gas (16) obtained in step d) in order to obtain the synthesis gas (17).

3. A method according to claim 1 or 2, characterized in that the first temperature and / or the third temperature is in the range of 150 to 350°C, more preferably in the range of 200 to 300°C, and / or the second temperature is in the range of 900 to 1400°C, more preferably in the range of 1000 to 1300°C, and / or the fourth temperature is in the range of 700 to 1000°C, more preferably in the range of 700 to 900°C.

4. A method according to any one of the preceding claims, wherein said gasifying agent (11) and / or said further gasifying agent (12) is essentially 100% by volume of CO 2 or 70% by volume to 99% by volume of CO 2 and 1% by volume to 30% by volume of H 2 O and / or O 2 or a mixture with, or 80% by volume to 98% by volume of CO 2 and 2% by volume to 20% by volume of H 2 O and / or O 2 A method characterized by comprising a mixture with.

5. A method according to any one of the preceding claims, characterized in that the carbonaceous treatment material (5) and / or the further carbonaceous treatment material (6) are supplemented with a carbon source as an additive in step a) and / or step c).

6. A method according to any one of the preceding claims, wherein the carbonaceous treatment material (5) and / or the further carbonaceous treatment material (6) comprises biomass, preferably comprising at least one component selected from the group consisting of sewage sludge, wood, agricultural waste, plant waste, grass clippings, plants, straw, silage, food waste, animal waste and slaughterhouse waste, papermaking sludge and / or bagasse and / or plastic waste, wherein the carbonaceous treatment material (5) and the further carbonaceous treatment material (6) are different from each other.

7. The method according to claim 6, The carbonaceous treatment material includes sewage sludge, more preferably a mixture of sewage sludge and wood, and the further carbonaceous treatment material optionally does not include sewage sludge, and / or The carbonaceous treatment material does not contain plastic waste, and the further carbonaceous treatment material contains plastic waste. A method characterized by the following.

8. A method according to any one of the preceding claims, characterized in that the carbonaceous treatment material and / or the further carbonaceous treatment material contains potassium in an amount ranging from 0% to 2.3% by weight as measured in accordance with DIN 38406-13, calcium in an amount ranging from 0% to 8% by weight as measured in accordance with DIN 11876:2010-12, and / or carbon in an amount ranging from 35% to 77% by weight as measured in accordance with DIN 16948:2015-09.

9. A method according to any one of the preceding claims, characterized in that the carbonaceous treatment material and / or the further carbonaceous treatment material contains water in an amount ranging from 50% to 80% by weight as measured in accordance with DIN 18134-1:2022.

10. A method according to any one of the preceding claims, wherein the synthesis gas (15, 17) and / or the further synthesis gas (16) is CO and H 2 A method characterized by including the following.

11. A method according to claim 10, wherein CO and H 2 A method characterized in that the ratio of is within the range of 1:3 to 30:1, preferably within the range of 1:2 to 25:

1.

12. A method according to any one of the preceding claims, characterized in that the electric heater is operated using surplus power during step b) and / or step d).

Images