108 results about "Partial oxidation" patented technology

Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves pyrolyzing one or more waste plastics into various pyrolysis products, including a carbon solids-containing pyrolysis residue, and then subjecting the pyrolysis residue to partial oxidation gasification to thereby form a syngas composition.

This invention belongs to the field of microwave absorbing material preparation technology, and discloses a two-step partial oxidation method to improve the microwave absorption performance of MXene materials. By performing hydrothermal pre-oxidation and heat treatment on MXene materials, oxide nanoparticles are grown in situ on their surface, achieving controllable partial oxidation. The MXene matrix retains a two-dimensional layered structure, and a heterogeneous interface is formed between the oxide nanoparticles and the MXene matrix. This adjusts the conductivity, optimizes impedance matching, enhances interface polarization, improves microwave absorption performance, and provides high-temperature stability.

A method for transient operation, such as start-up or shut-down, of a burner of a partial oxidation reactor in which, under normal conditions, the burner is operated using a carbon-containing gaseous fuel and the fuel is combusted in the presence of oxygen in a combustion chamber, in which the method comprises replacing the fuel with hydrogen during transient operation, therefore, the formation of smoke dust is reduced.

The invention relates to fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite and a preparation method and application thereof, ions in the cobalt nickel-aluminum hydrotalcite are Co < 2 + >, Ni < 2 + > and Al < 3 + > respectively, and a fluorocarbon chain is prepared from at least one compound in formulas (I)-(III); comprising the following steps: S1, stirring and mixing a Co < 2 + > aqueous solution, a Ni < 2 + > aqueous solution, an Al < 3 + > aqueous solution and a urea aqueous solution in an inert gas atmosphere, then carrying out a hydrothermal reaction, and after the reaction is finished, carrying out post-treatment to obtain cobalt nickel-aluminum hydrotalcite; and S2, dispersing the cobalt nickel-aluminum hydrotalcite in anhydrous toluene, reacting the cobalt nickel-aluminum hydrotalcite with at least one compound in formulas (I)-(III) under the action of triethylamine in an inert gas atmosphere, and after the reaction is finished, performing post-treatment to obtain fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite, the hydrotalcite is applied to preparation of naphthenic alcohol and naphthenic ketone by catalyzing partial oxidation of naphthenic hydrocarbon. The method has the advantages of high selectivity, high product yield, low content of naphthenic hydroperoxide in the reaction process, and high operation safety.

The present invention relates to AB2O4 type mixed metal oxide catalyst system having spinel / inverse spinel structure with support. The present invention also relates to the process for preparation of mixed metal oxide catalyst system. More particularly, the present invention relates to a process for the partial oxidation of alkanes to value added products and corresponding oxygenates by using said AB2O4 type mixed metal oxide catalyst with support(s).

Embodiments of the present invention provide a device for torrefaction of a raw material, such as a biomass. The device includes a rotating cylinder with a number of baffles and stiffener to rotate and stir the raw material, performing torrefaction in partially oxidative atmosphere. The torrefaction process takes part inside the long multiple reactors of a rotary drum, that the timing of the material to be fed is not particularly dependent on the timing or instances of outputting of torrefied material, because some of the reactors maytorrefy the material (e.g., 6 out of 8), while some of the last reactors may cool down the torrefied material (e.g., 2 out of 8), ensuring continuous process.

The invention discloses a catalyst combination method for simultaneously removing CO and NOx in flue gas, which is characterized in that two reaction systems are arranged in a flue gas purification device, the flue gas enters the flue gas purification device, ammonia spraying operation is carried out, oxidation reaction is carried out on the upper layer of the flue gas purification device, and CO in the flue gas is oxidized into CO2 and part of NO is oxidized into NO2 under the catalytic action of an oxidation catalyst Co1-xNix / Al2O3; according to the method, CO and NOx in the flue gas are removed at the same time, NH3-SCR reaction is carried out on the lower layer of the flue gas purification device, and under the catalytic action of a NOx selective reduction catalyst, blown ammonia gas and NOx in the flue gas are converted into N2 and H2O, so that CO and NOx in the flue gas are removed at the same time. The flue gas purification device is utilized to realize efficient and synergistic removal of CO and NOx, and has the characteristics of high efficiency, simple catalyst preparation, convenience in engineering application and the like.

Process and plant for the production of ammonia and urea which use as feedstock a gaseous mixture deriving from various industrial processes, in particular metallurgical iron ore reduction processes. The process produces a loop that uses the short contact time catalytic partial oxidation (SCT-CPO) reaction to convert purge gases of the ammonia synthesis to synthesis gas which is combined with the feedstock to be treated. The oxygen for the partial oxidation reaction is obtained by electrolysis of water or through air separation. The CO2 contained in the feedstock and / or emitted in the process steps is used for the production of urea.

A hydrogen extraction catalyst based on the partial oxidation of ammonia, a method for producing the same, and a hydrogen extraction method using the above catalyst are disclosed. The hydrogen extraction catalyst based on the partial oxidation of ammonia comprises a support and ruthenium (Ru) supported on the support, and the hydrogen extraction method using the above catalyst maintains a high internal temperature of the reactor without an external heat source, solves the problem of reduced thermal efficiency due to long reaction times, and yields a high ammonia conversion rate.

A non-transitory, processor readable medium stores instructions that, when executed by a processor, causes the processor to receive (1) an indication of a feed gas flow rate measured between a feed gas source and an internal combustion engine (ICE) and (2) an indication of an oxygen enriched air flow rate measured between an air separation unit (ASU) and the ICE. A measured equivalence ratio is determined based on a feed gas composition, the feed gas flow rate, and the oxygen enriched air flow rate. The instructions further cause the processor to generate at least one of a first signal to cause a change in revolution speed of the ICE, a second signal to cause a first flow control device to modify the feed gas flow rate, or a third signal to cause a second flow control device to modify the oxygen enriched air flow rate.

The application provides a method for preparing hydrogen by methane chemical looping. The method comprises: contacting methane with a first oxygen carrier to perform a first reaction to prepare syngas and a reduced first oxygen carrier; wherein the first oxygen carrier is selected from an oxygen carrier with a chemical formula of Fe 0.2 Ni 0.2 Mn 0.2 Cu 0.2 Co 0.2 Al2O4; the syngas obtained by the first reaction is contacted with a second oxygen carrier to perform a second reaction to prepare CO2 and a reduced second oxygen carrier; wherein the second oxygen carrier is selected from an oxygen carrier with a chemical formula of LaAl 1 / 4 Co 1 / 4 Mn 1 / 4 Fe 1 / 4O3; the reduced second oxygen carrier is contacted with water vapor to perform a third reaction to prepare hydrogen and a partially oxidized second oxygen carrier; the partially oxidized second oxygen carrier is subjected to a complete oxidation reaction to obtain a second oxygen carrier, and the second oxygen carrier is recycled for the second reaction.

Chemical recycling facilities for processing mixed waste plastic are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy recovery facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

Densified textile aggregates are co-fed with a fuel into a partial oxidation gasifier. High solids concentrations in the feedstock composition can be obtained without significant impact on the feedstock composition stability and pumpability. A consistent quality of syngas can be continuously produced, including generation of carbon dioxide and a carbon monoxide / hydrogen ratio while stably operating the gasifier and avoiding the high tar generation of fluidized bed or fixed bed waste gasifiers and without impacting the operations of the gasifier. The syngas quality, composition, and throughput are suitable for produce a wide range of chemicals.

The invention discloses a ferrochrome liquid decarburization method based on partial roasting and step-by-step vacuum, and belongs to the technical field of ferroalloy smelting. During operation, only part of ferrochrome raw materials and powder need to be ground into powder and roasted into the endogenous oxidizing agent mainly comprising chromic oxide; then, in a vacuum induction furnace, the blocky ferrochrome and part of the oxidizing agent are molten to form a liquid molten pool, the oxidizing agent reacts with carbon in the melt through the process of combining step-by-step stepped vacuumizing and adding of the remaining oxidizing agent in batches, generated CO is rapidly pumped away by a vacuum system, and therefore deep decarburization is achieved. The method effectively solves the technical bottlenecks that a traditional oxygen blowing method cannot produce micro-carbon ferrochrome, and a vacuum solid-state method is tedious in raw material treatment and too long in decarburization period.

The production method of the unsaturated aldehyde or unsaturated carboxylic acid of the present invention is characterized in that it is a method of producing the corresponding unsaturated aldehyde or unsaturated carboxylic acid by partial oxidation of an olefin using a fixed bed multi-tube type reactor, and the production parameter T satisfies the following formula (I): T ≤ 20.5 (I).

The present invention relates to a process for increasing the H2 content of syngas, preferably using the hot outlet gas of an autothermal reforming process and / or a process for partial oxidation of hydrocarbons. In particular, it has surprisingly been found that an endothermic NH3 reforming process can be coupled with a hot outlet gas stemming for example from ATR and / or POx processes to increase the H2 content of syngas.

A method for the suppression of soot formation during the partial oxidation of a hydrocarbon-containing gaseous feed, in the presence of steam and in an ATR reactor or in a POX reactor, the method comprising the addition of gaseous carbon dioxide to the hydrocarbon-containing gaseous feed before entry into the reactor. A method for determining a minimum steam to carbon ratio required for scot-free operation is also disclosed.

A process for preparing carbon monoxide and hydrogen A process for preparing carbon monoxide and molecular hydrogen, comprising a) providing a partial oxidation feed stream Spox comprising a hydrolysis oil from hydrolysis of a composite material Mc, the composite material Mc comprising an organic polymeric matrix and a fiber component; b) subjecting the stream Spox to partial oxidation conditions in a partial oxidation reactor at a temperature in the reactor of at least 400 °C and at a pressure in the reactor of at least 1 bar(abs), obtaining a gas stream S1 comprising CO and H2 and further comprising CO2, H2O, CH4, solid particulates and optionally one or more of H2S and at least one nitrogen compound, wherein step a) subjecting a composite material MC to hydrolysis conditions in a hydrolysis reactor obtaining a hydrolysis product comprising an aqueous phase, a fiber component and a solid polymeric hydrolysis product; the process further comprising separating the aqueous phase from the fiber component and the polymeric hydrolysis product; contacting the fiber component and the solid polymeric hydrolysis product separated according to with a solvent, thereby dissolving the polymeric hydrolysis product in said solvent, obtaining a mixture comprising the polymeric hydrolysis product dissolved in the solvent and further comprising the fiber component; separating the fiber component from the obtained mixture, obtaining a solution of the polymeric hydrolysis product; separating solvent from the obtained solution, obtaining the hydrolysis oil; wherein the hydrolysis reactor is a closed reactor; wherein the hydrolysis conditions comprise a temperature in the hydrolysis reactor in the range of from 220 to 290°C.

Apparatus, comprising an engine including a reactor chamber and a plurality of inlets coupled to the reactor chamber, the plurality of inlets including a first inlet configured to deliver a reactant stream and at least two oxidizer inlets configured to deliver at least two oxidizer streams wherein the reactor chamber is configured to receive the reactant stream and the at least two oxidizer streams to conduct a reaction therebetween to produce a product and the at least two oxidizer inlets are configured to supply variable relative contributions of the at least two oxidizer streams such that a combined oxidizer stream has a variable oxygen concentration. Method of operating a reactor, comprising supplying a reactant stream to a reactor chamber included in the reactor; supplying at least two oxidizer streams to the reactor chamber, the at least two oxidizer streams being supplied individually or in combination; and conducting a reaction between the reactant stream and the at least two oxidizer streams in the reactor chamber to produce a product.

The utility model relates to the technical field of treatment systems for the content of CO and H2 in coal gasification gas, in particular to a post-treatment system for improving the content of CO and H2 in coal gasification gas. According to the technical scheme, the post-treatment system for increasing the content of CO and H2 in the coal gasification gas comprises a high-temperature pure oxygen non-catalytic partial oxidation reaction module, according to the utility model, the non-catalytic partial oxidation reaction equipment and the heat recovery equipment are arranged, so that the process flow of purifying the underground coal gasification product gas is greatly simplified, and the product gas can be subjected to primary purification and heat recovery; the technical process of the product gas purification treatment device matched with the underground coal gasification device is more economical and reasonable, the advantages of reliability and low cost of the underground coal gasification technology are fully played, the problems existing in the existing underground coal gasification technology are solved, CH4 in coal gas is cracked, CO and H2 are generated, and the product gas purification treatment device is more environmentally friendly. And the content of effective components in the coal gas is increased.

Systems and methods are provided for performing both reforming and partial oxidation as part of the reaction step of a reaction cycle in a cyclic reaction environment such as a reverse flow reaction environment, where heat is provided by direct heating during a regeneration step. In some aspects, performing a combination of reforming and partial oxidation can allow for higher conversion of hydrocarbons than reforming alone while reducing or minimizing the peak temperatures within the cyclic reaction environment. In some aspects, performing both reforming and partial oxidation can also allow for an improved molar ratio of H2 to CO in the resulting effluent from the conversion reaction (relative to partial oxidation) while still maintaining high total conversion.

The application discloses a method for controlling the formation of crosswise lines of large-size low-carbon wire rod, and the production process of the large-size low-carbon wire rod comprises the following steps: tapping, converter, refining, continuous casting, heating, rolling and finishing, wherein, in the heating process, the soaking temperature is controlled to be 1010±20 DEG C; in the rolling process, the finishing temperature is 850±15 DEG C, the wire laying temperature is 915±15 DEG C, the temperature of entering the heat preservation cover is 780±30 DEG C, the temperature of leaving the heat preservation cover is 650±30 DEG C, and the temperature of the lower coil is 540±30 DEG C. The steel material obtained by the application does not produce partial oxidation scale cracking of the steel material in the offline cooling process, thereby avoiding the crosswise lines caused by cracking.

The invention relates to the technical field of solid oxide fuel cells, in particular to an integral honeycomb ceramic catalyst for hydrogen production by partial oxidation reforming of propane, a preparation method and application. The pore walls of the silicon carbide honeycomb ceramic carrier are coated with catalyst slurry through negative pressure driving, and the monolithic honeycomb ceramic catalyst is obtained after drying and roasting. The catalyst slurry comprises a noble metal precursor and a composite carrier, the noble metal precursor comprises platinum and palladium, and the composite carrier comprises nano cerium oxide and gamma-aluminum oxide. The micro-channel type integral honeycomb ceramic is used as a carrier, so that the specific surface area can be greatly increased, the uniform distribution of active substance sites in the composite active catalyst layer is facilitated, and the conversion rate and the reaction rate of partial oxidation reforming reaction of propane are improved.

The application discloses a high-selectivity catalyst for gas-phase aldehyde hydrogenation to alcohol and a preparation method thereof. The method comprises the following steps: firstly, an aluminum source, a magnesium source, a template agent and water are mixed to prepare a first salt solution, and then the first salt solution and a precipitating agent are subjected to parallel flow precipitation to form a first precipitate; secondly, copper nitrate, zinc nitate and water are mixed to prepare a second salt solution, and then the second salt solution and the precipitating agent are dropped into the precipitate prepared in the first step by means of differential parallel flow co-precipitation; and thirdly, the mixture obtained after co-precipitation in the first step and the second step is uniformly mixed, and then is subjected to aging under stirring, so that the first precipitate is completely neutralized, and then a heat-conducting additive is added. The catalyst prepared by the method has high specific surface area and high pore volume, the mass transfer and heat transfer efficiency is improved, the side reaction is reduced, meanwhile, the zinc oxide coating part of the copper oxide weakens the generation of C16 ester, and the selectivity and conversion rate of the gas-phase aldehyde hydrogenation reaction are further improved.

The invention relates to a process for obtaining a hydrogen stream (1) in a plant (2), wherein a carbon-containing energy carrier stream (3) and an oxygen stream (4) are fed from an oxygen recovery arrangement (5) of the plant (2) to an ATR reactor arrangement (6) of the plant (2) for obtaining a synthesis gas stream (7) comprising hydrogen and carbon oxides, wherein the ATR reactor arrangement (6) affords the synthesis gas stream (7) from the energy carrier stream (3) by autothermal reforming with the oxygen stream (4), so that a catalytic partial oxidation in particular provides the heat required for the endothermic reforming reactions, wherein the synthesis gas stream (7) is fed at least partly to a separating device (8) of the plant (2) for separating the synthesis gas stream (7) into the hydrogen stream (1) including hydrogen and a purge stream (9) including carbon oxides, wherein the plant (2) has a steam heater (13), which steam heater (13) has at least one superheating stage (14a, b) for obtaining a respective superheated output steam stream (15a, b) from a respective input steam stream (16a, b), which input steam stream (16a, b) is conducted through the steam heater (13) until the superheated output steam stream (15a, b) is obtained, and wherein the plant (2) includes a turbine arrangement (12) for generating electrical power, which turbine arrangement (12) is driven by at least one superheated output steam stream (15a, b), characterized in that the at least one superheating stage (14a, b) has at least two heating sections (17) in each case, which heating sections (17) are guided through an inner region (18) of the steam heater (13), in which inner region (18) the heating sections (17) are heated by a burner (19) of the steam heater (13), in that the at least one superheating stage (14a, b) has a quench section (20) which is arranged between the at least two heating sections (17) in terms of process technology, in which quench section (20) steam obtained in

The invention discloses a regeneration method of silicon oxide polishing waste liquid and application thereof. The regeneration method comprises the following steps: S1, collecting crystallized or agglomerated silicon oxide polishing waste liquid; s2, adding a hydrofluoric acid aqueous solution into the waste liquid, uniformly mixing for reaction, eroding bonding points on the surfaces of the agglomerated silicon oxide particles by utilizing hydrofluoric acid, converting part of silicon oxide into movable fluosilicate ions, and combining the fluosilicate ions with metal cations in the waste liquid to generate fluosilicate precipitates; s3, performing primary filtration on the mixed solution treated in the step S2 through a first filter medium to remove particles with the particle size greater than a first threshold value so as to obtain a primary filtrate; s4, the primary filtrate is subjected to secondary filtration through a second filter medium, particles with the particle size larger than a second threshold value are removed, fine filtrate is obtained, and the pore diameter of the second filter medium is smaller than that of the first filter medium; and S5, collecting the fine filtrate as a regenerated silicon oxide polishing solution. The invention aims to reduce the chemical mechanical polishing processing cost of the silicon carbide substrate.

The invention relates to a method for producing a hydrogen stream (1), wherein a carbon-containing energy carrier stream (3) and an oxygen stream (4) from an oxygen generation arrangement (5) of a plant (2) are supplied to an ATR reactor arrangement (6) of the plant (2) in order to produce a synthesis gas stream (7) comprising hydrogen and carbon oxides, wherein the ATR reactor arrangement (6) produces the synthesis gas stream (7) from the energy carrier stream (3) by autothermal reforming with the oxygen stream (4), such that a partial oxidation, in particular a catalytic partial oxidation, provides the heat required for the endothermic reforming reactions, wherein the synthesis gas stream (7) is at least in part supplied to an adsorption device (8) of the plant (2) in order to separate the synthesis gas stream (7) into the hydrogen-containing hydrogen stream (1) and into a first purge stream (10a) and a second purge stream (10b), each comprising carbon oxides. The method is characterised in that: the first purge stream (10a) is supplied to a recovery adsorption device (11) of the plant (2) in order to separate hydrogen from the first purge stream (10); the recovery adsorption device (11) provides a recovery stream (12), that comprises the separated hydrogen, and a remaining recycle stream (13); the recycle stream (13) is supplied substantially completely to the energy carrier stream (3); and the second purge stream (10b) is supplied for combustion to at least one feedstock heater (15a) of a plurality of feedstock heaters (15a-e) of the plant (2). The invention also relates to a corresponding plant for producing a hydrogen stream and to a method for preparing methanol.

The invention relates to a system and a method for synthesizing blue ammonia from associated gas of a floating oil and gas field and air. Compared with the prior art, associated gas is treated through the raw material module to obtain methane-rich gas; the methane-rich gas is treated through a reforming module to obtain synthesis gas; wherein a methane catalytic reforming reaction is carried out through the steam reforming reactor, and a methane air partial oxidation reaction is carried out through the partial oxidation reactor; the synthesis liquefaction module is used for synthesizing blue ammonia through synthesis gas, methane generating carbon emission is converted into green energy ammonia, air is directly used as raw material gas, a special nitrogen generation module does not need to be independently arranged, the problem that a large amount of high-purity nitrogen is prepared on the sea is solved, the occupied area of equipment is reduced, and the stability under the working condition of shaking on the sea is improved; the requirements for compact arrangement and gravity center control of the floating platform are easily met, the method is suitable for large-scale production, and clean conversion and utilization of offshore oilfield associated gas are achieved.

A process for the continuous production of either acrolein or acrylic acid as the target product from propene comprising a catalyzed gas phase partial oxidation of propene to yield a product gas containing the target product, transferring the target product in a separating zone from the product gas into the liquid phase and conducting out of the separating zone a stream of residual gas the major portion of which is returned into the partial oxidation and the remaining portion of said stream is purged from the process as off-gas from which synthesis gas can be produced or which can be added to synthesis gas produced otherwise.