2295results about "Hydrogen/synthetic gas production" patented technology

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine. The present invention utilizes an electric catalyst unit operating in series with a plate-type heat exchange catalyst unit. The electric catalyst unit is used to initiate an ammonia cracking process on-board during a cold start or low load operating condition of the internal combustion engine, where the ammonia cracking process occurs in the heat exchange catalyst unit once exhaust gas from the internal combustion engine has been heated to a threshold temperature suitable to perform the ammonia cracking process.

The invention discloses a catalyst for hydrogen production through tar steam reforming and a preparation method and application thereof. The catalyst comprises a cobalt-magnesium-aluminum composite spinel carrier and an active component loaded on the cobalt-magnesium-aluminum composite spinel carrier, the active component comprises nickel and at least one metal additive selected from iron, zirconium and ruthenium. The preparation method mainly comprises the following steps: preparing the carrier by adopting a coprecipitation method, loading the active component by adopting an impregnation method, and drying and reducing to obtain the final catalyst. The catalyst is used for tar component steam reforming hydrogen production reaction, especially for treating raw materials containing phenol and water vapor at 600-700 DEG C, tar conversion can be efficiently catalyzed, product gas rich in hydrogen can be generated, hydrogen selectivity is high, and almost no methane is generated. The catalyst has the advantages of high activity, good stability, strong carbon deposition resistance and the like, and is suitable for purification and high-value utilization of biomass pyrolysis tar.

The invention relates to the technical field of chemical catalysts, in particular to a cerium-based solid solution loaded iron-based oxygen vacancy enhanced low-temperature ammonia synthesis catalyst. The heterovalent ions are doped in CeO2 crystal lattices to introduce strain and defects, so that the oxygen vacancy formation energy and concentration are greatly improved. Experiments show that the oxygen vacancy concentration (delta) of the Ce0. 8Zr0. 2O2-delta carrier disclosed by the invention can reach 0.12, which is 3-5 times that of pure CeO2. Under the conditions of 250 DEG C and 5 MPa, the ammonia synthesis rate reaches 120 [mu] mol / g / h, which is more than 20 times that of a traditional molten iron catalyst; under the conditions of 350 DEG C and 10 MPa, the ammonia synthesis rate exceeds 1000 [mu] mol / g / h and is close to the level of a noble metal ruthenium-based catalyst. As the working temperature is reduced by 100-150 DEG C, the reaction heat consumption is reduced by more than 30%, and the overall energy consumption is reduced by 25-40%.

Disclosed are multi-cartridge hollow fiber membrane apparatuses and methods for gas separation using them. Each external pressure type membrane apparatus contains one or more series of cartridges wherein the cartridges within each series are arranged sequentially. The retentate gas generated by each preceding cartridge in the series is used as a feed gas to the next cartridge in the series, and the permeate gas generated by a cartridge following the first cartridge in the series is used as a sweep gas on the permeate side of the preceding cartridge. The multicomponent gas mixture is separated into one or more products by the method of the invention with improved product recovery and / or product purity.

A hydrogen gas supply apparatus according to one aspect of the present invention includes a compressor configured to compress hydrogen gas and supply the hydrogen gas compressed to a pressure accumulator which accumulates the hydrogen gas, an adsorption column disposed between the discharge port of the compressor and the pressure accumulator, and configured to include an adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, and a plurality of valves disposed at the gas inlet / outlet port side of the adsorption column, being at a discharge port side of the compressor, and configured to be able to seal the adsorption column, wherein the space in the adsorption column is sealed using the plurality of valves such that the inside of the adsorption column is maintained to have a high pressure by the hydrogen gas compressed in the case where the compressor is stopped.

The invention belongs to the technical field of catalysts, and discloses an ammonia decomposition hydrogen production catalyst and a preparation method and application thereof. The preparation method of the catalyst for hydrogen production through ammonia decomposition comprises the following steps: in an inert atmosphere, successively carrying out calcination and acid treatment on a carbon carrier to prepare an acid-treated graphitized carbon carrier; adding a ruthenium precursor, a rare earth element precursor and an alkali metal precursor into ethanol, and mixing to prepare a mixed solution; then adding a graphitized carbon carrier into the mixed solution, and mixing; then adding urea and a surfactant, continuously mixing, and standing to obtain a solid precipitate; and finally, carrying out heat treatment on the solid precipitate in a reducing atmosphere. The catalyst takes a highly graphitized carbon material as a carrier, an alkali metal is doped to provide an alkaline environment, and a rare earth metal oxide and Ru form dual-assistant synergistic regulation of an interface, so that low-temperature high-activity ammonia decomposition hydrogen production and long-acting stable operation are realized.

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.

Disclosed in the present invention is an integrated reforming power generation test system having wide-range fuel adaptability, comprising a fuel supply subsystem, a catalytic reforming subsystem, a hydrogen purification subsystem, a power generation subsystem, and a test monitoring subsystem. A fuel pump and a fuel delivery pump are connected to a water-gas shift reactor by means of an evaporator and a reformer, the water-gas shift reactor is connected to a pressure swing adsorption device by means of a first gas-liquid separator, the pressure swing adsorption device is connected to a fuel cell stack by means of a hydrogen buffer tank, and a gas chromatograph is connected to the reformer by means of a third gas-liquid separator and to the water-gas shift reactor by means of a second gas-liquid separator. By using a variety of fuel resources to produce electricity, the present invention breaks through the limitation of the scope of traditional single-fuel reforming power generation systems, ensures the reliability of electricity supply, gets rid of the dependence on specific fuels, enhances regional energy safety, and improves the flexibility of energy supply.

The invention relates to the technical field of preparation of catalysts, in particular to a titanium dioxide modified mesoporous nickel catalyst, a preparation process and application thereof, and the preparation method comprises the following steps: S1, preparing a titanium dioxide modified mesoporous silicon dioxide material; s2, nickel-based acid liquid is added into the titanium dioxide modified mesoporous silicon dioxide material, ultrasonic treatment is performed for 1 h after sufficient mixing, standing is performed for 24 h at the room temperature so as to perform the dipping process, and then the mixture is transferred into a drying oven and dried at the temperature of 110 DEG C; and S3, uniformly grinding the dried solid, putting a sample into a crucible, transferring the sample into a tubular furnace, introducing argon as a protective atmosphere, heating to 550 DEG C at a heating rate of 1 DEG C / min, and roasting for 6 hours to obtain the titanium dioxide modified mesoporous nickel catalyst. The method has relatively high industrial potential, can replace an expensive noble metal catalyst to be used for industrial production, and lays a certain technical foundation for realizing final industrial production of a carbon dioxide methane reforming reaction and integrating the reaction into a green energy storage system.

A process for the production of carbon monoxide is described. The process involves the electrochemical desorption of carbon dioxide and oxygen from a solution containing a metal bicarbonate and the formation of carbon monoxide from the carbon dioxide. The carbon monoxide produced can be used in a process for the formation of syngas.

A process for the production of hydrogen is described comprising the steps of: (i) reforming a gaseous mixture comprising a hydrocarbon and steam having a steam to carbon ratio in the range of 0.4:1 to 1.8:1, to in a reforming unit comprising an autothermal reformer to produce a reformed gas mixture, (ii) subjecting the reformed gas mixture to an isothermal water-gas shift reaction in an isothermal water-gas shift reactor using water as a heat exchange medium, thereby increasing the hydrogen content of the reformed gas mixture and producing a hydrogen-enriched reformed gas while raising steam, cooling at least some of the hydrogen-enriched reformed gas and separating condensed water therefrom to provide a de-watered hydrogen-enriched reformed gas, (iv) subjecting at least some of the de-watered hydrogen-enriched reformed gas to carbon dioxide separation by performing a reactive amine wash on the hydrogen-enriched reformed gas in a carbon dioxide separation unit to recover carbon dioxide gas and crude hydrogen gas, and (v) subjecting at least some of the crude hydrogen gas to purification in a hydrogen purification unit to produce a purified hydrogen gas and a tail gas, wherein a portion of the tail gas is recycled to the process.

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The application discloses a preformed methane reforming catalyst and a preparation method thereof. The catalyst comprises a nickel-active alumina first functional component, a cerium oxide nanocluster second functional component and an alumina inert phase. The preparation method comprises preforming an inert phase pretreatment, hydrothermal treatment, calcination and reduction. The preformed inert phase after pretreatment is used as a carrier, which greatly improves the catalyst strength, pertinently weakens the metal-carrier interaction, avoids bed layer temperature drop and carbon deposition caused by local high strength reaction, and improves the operation stability. The first functional component with a layered structure and the second functional component rich in oxygen vacancies further improve the catalyst activity and stability, and the performance indicators are overall superior to those of the existing catalyst products. The preparation method is simple and easy to implement, has no special requirements on equipment, and is conducive to the popularization and application in the fields of methane steam reforming and methane dry reforming.

A process for the production of hydrogen is described comprising the steps of: (i) subjecting a gaseous mixture comprising a hydrocarbon and steam to steam reforming in a reforming unit comprising an autothermal reformer to generate a reformed gas mixture; (ii) increasing the hydrogen content of the reformed gas mixture by subjecting it to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-enriched reformed gas; (iii) passing the hydrogen-enriched reformed gas and an oxygen-rich gas to an oxidation unit containing an oxidation catalyst that converts carbon monoxide present in the hydrogen-enriched reformed gas to carbon dioxide, to form a carbon dioxide-enriched gas mixture; and (iv) passing the carbon dioxide-enriched gas mixture to a product separation unit to provide a hydrogen gas stream, a carbon dioxide gas stream and a by-product gas stream, wherein at least a portion of the by-product gas stream is compressed and recycled to one or more of the reforming unit, the water-gas-shift unit, the oxidation unit, and the product separation unit.

The application discloses a preparation method and application of a ferroelectric full water-splitting photocatalyst. The preparation method comprises the following steps: S1: pretreating a ferroelectric material to obtain a pretreated ferroelectric material; S2: after atomic layer deposition of the pretreated ferroelectric material and a metal organic complex source material, non-active gas I is introduced to perform blowing I, water is introduced, non-active gas II is introduced again to perform blowing II, and the first deposition is completed; and S3: according to the thickness of the ferroelectric full water-splitting photocatalyst, the step S2 is circularly performed to obtain the ferroelectric full water-splitting photocatalyst. The ferroelectric material can efficiently photocatalyze full water splitting through accurate regulation and modification of the surface of the ferroelectric material by the atomic layer deposition technology. The method not only provides an experimental basis for researching the limiting factors of the ferroelectric material in a photocatalytic reaction, but also provides a new idea for constructing an efficient photocatalyst by using efficient charge separation and depolarization electric field of the ferroelectric material.

A system comprising a gasifier comprising one or more burners configured to accept a carbonaceous fuel and an oxidant to produce a syngas and a molten slag; a throat configured to accept the syngas and molten slag from the gasifier; and a radiant syngas cooler positioned below the gasifier configured to accept the syngas and molten slag from the throat; wherein the throat comprises an outer wall and one or more fins extending radially inwards from the outer wall.

Compositions and methods for the catalysis of methane pyrolysis. Compositions include a catalyst system that includes a medium entropy alloy particle and a support. Methods include catalyzing the pyrolysis of methane using the catalyst system.

A system for producing CO and CO2 to achieve an efficient oil recovery operation that minimizes undesirable gaseous emissions is provided. The system includes a portable CO-producing device, a portable CO2-producing device located proximate to the reservoir, and a gas collecting device configured to receive CO and CO2 and selectively distribute a desired ratio of CO and CO2 dynamically based on current reservoir conditions. Producing CO2 proximate to the reservoir comprises reforming carbon-based fuel within oxygen. Electrical energy generated is used to selectively distribute the desired ratio of CO / CO2 to the reservoir with de minimis greenhouse gases produced transmitted into the atmosphere. The system is an energy-efficient arrangement that recycles and reuses by-products and unused products from the process. Greenhouse gas emissions are significantly reduced compared to conventional processes by-products are fully utilized. Hydrogen produced can be used to generate electricity, as can heat generated from other sources within the process.

The invention discloses application of a supported heterogeneous catalyst of oxide and copper-manganese spinel in preparation of acetaldehyde by anaerobic dehydrogenation of ethanol, and belongs to the technical field of heterogeneous catalysis for preparation of acetaldehyde and hydrogen by anaerobic dehydrogenation of ethanol. The reaction is carried out in a fixed bed reactor, under the conditions that the reaction atmosphere is nitrogen, the reaction temperature is 280 DEG C and the mass space velocity is 66.1 h <-1 >, the ethanol conversion rate is 72.5%, the acetaldehyde selectivity is 95.0%, and the space time yield of acetaldehyde based on the copper-manganese composite oxide is 43.5 h <-1 >, so that high-selectivity preparation of acetaldehyde and hydrogen under relatively mild conditions is realized; the system has the remarkable advantages of simple catalyst preparation, high catalytic activity under the condition of high mass airspeed, high space-time yield of acetaldehyde, high atom utilization rate of the system, good stability and the like. The CuMnTi-1 catalyst can be stabilized for more than 70 hours, the CuMnTi-1 improves the utilization rate of copper and manganese, improves the catalytic performance, reduces the demand quantity of copper-manganese spinel in the reaction, and reduces the overall cost of catalyst preparation.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The application discloses a method suitable for hydrogen production in situ in an oil reservoir underground, and belongs to the technical field of oil and gas development. The method comprises the following steps: arranging three horizontal wells, i.e., upper, middle and lower horizontal wells, and a temperature detection well in the same reservoir, the temperature detection well is used for detecting the temperature of the middle horizontal well, and a hydrogen gas filter membrane is arranged at the upper horizontal well; a heating device is arranged at the middle horizontal well, a close cutting volume fracturing is carried out around the well, and a reaction zone is formed by filling a catalyst and a heat-conducting agent; in-situ ignition is carried out at the lower horizontal well, and an oxygen-containing gas is injected, so that the oxygen-containing gas is incompletely combusted to generate CO and CO2 and form a gasification zone; a heating device is used for heating to above 450 DEG C, when the gas in the gasification zone enters the reaction zone, water vapor is injected to carry out high-efficiency hydrogen production; and the upper horizontal well is opened, and the hydrogen gas filter membrane is used for extracting hydrogen gas. The hydrogen production block is separated, the underground hydrogen production efficiency is greatly improved, the energy utilization rate is improved, and therefore the method has good application value.

A hydrocarbon stream is reformed in the presence of oxygen and steam to produce a syngas stream. A hydrogen stream is separated from the syngas stream. The hydrogen stream is combusted to produce a steam stream. The steam stream is flowed to a turbine wheel of an electric generator, thereby causing the steam stream to expand while flowing across the turbine wheel and the turbine wheel to rotate. The electric generator generates electrical power in response to rotation of the turbine wheel. In this way, hydrogen produced by reforming can be utilized as a clean fuel source for cogeneration to produce useful heat and electricity while simultaneously decreasing the carbon footprint of the process.

The invention provides a silicate nanotube photo-thermal composite catalyst with CeO2-ZrO2 compositely coated with Ni as well as a preparation method and application of the silicate nanotube photo-thermal composite catalyst, and belongs to the technical field of energy materials. The catalyst takes a layered silicate nanotube as a carrier, is loaded with an active component Ni, and is coated with a CeO2-ZrO2 composite shell layer. The preparation method comprises the steps that firstly, a Ni-PSNTs precursor is synthesized through microwave hydrothermal synthesis, then Ce-Zr hydroxide is deposited in an ethanol solvent, ZrO2 / CeO2 layers are stacked alternately through an atomic layer deposition method, H2 / N2 pulse reduction is conducted after calcination, and the target catalyst is obtained. The methane conversion efficiency and stability are obviously improved. The problems that a traditional catalyst is low in activity, poor in carbon deposition resistance and low in photo-thermal efficiency are solved, and the catalyst is suitable for the fields of efficient conversion of fossil energy and the like.

A system and method for producing methanol and synthetic fuels from waste acid gas streams using a plasma reactor is described in this disclosure. An acid gas stream comprising primarily of H2S and CO2 is fed into a plasma reactor. H2S is converted into H2 and sulfur. Simultaneously, CO is formed by the reverse water gas shift reaction. H2 and CO form a syngas stream. The unreacted H2S is captured in a tail gas treatment unit and recycled back to the plasma reactor. A partial CO2 capture unit is placed downstream of the tail gas treatment unit which is primarily used to adjust the ratio of H2 and CO in the syngas stream to 2-3 for methanol production and 2 for fuel production.

Hydrogen is produced by electrolysis of water using electricity generated from a renewable energy source such as wind and / or solar radiation, compressed in a multistage compression system and consumed in at least one downstream process. Supply of hydrogen to the downstream process(es) fluctuates with demand and / or the availability of the renewable energy source. In order to accommodate such fluctuations, excess hydrogen is stored during periods when production of hydrogen exceeds that required by the downstream process(es) so that, during periods when demand exceeds production, hydrogen is removed from storage and, after suitable pressure reduction, fed to the downstream process(es) via a stage of the multistage compression system.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

A autothermal reforming catalyst that includes treated black powder (primarily hematite), and a method of treating black powder (e.g., from a natural gas pipeline) to give the treated black powder. An autothermal reformer having the treated black powder as reforming catalyst, and a method of producing syngas with the autothermal reformer.

The invention provides a composite catalyst for supercritical water gasification hydrogen production and a preparation method and application thereof, and relates to the technical field of organic solid waste recycling, the composite catalyst comprises a carrier, an active component and an auxiliary agent; the carrier is prepared from a ZrO2 mesoporous material co-doped with Ce and La; the active component comprises Ni-Co bimetallic nanoparticles, and the Ni-Co bimetallic nanoparticles are subjected to vulcanization treatment to form a core-shell structure in which Ni-Co metal is wrapped by sulfur; and the auxiliary agent comprises MoO3. According to the composite catalyst, a Ce-La-ZrO2 mesoporous material serves as a carrier, Ni-Co bimetallic nanoparticles serve as an active component, a core-shell structure (NiCo at S) is formed after vulcanization treatment, the surface of the core-shell structure is covered with a layer of sulfur atoms, carbon deposition can be effectively inhibited, the chlorine poisoning resistance of the catalyst is enhanced through the added MoO3 auxiliary, and the service life of the catalyst is prolonged.

A process for process for generating power in an ammonia-fueled gas turbine power plant includes flowing an ammonia feed stream to an ammonia cracker reactor in geographical proximity to an ammonia-fueled gas turbine power plant to crack ammonia feed stream under cracking conditions, thereby producing a product effluent comprising ammonia and hydrogen, flowing the product effluent comprising ammonia and hydrogen to an ammonia-fueled gas turbine of an ammonia-fueled gas turbine power plant, and combusting the product effluent comprising ammonia and hydrogen to drive the ammonia-fueled gas turbine. An exhaust gas stream generated from the ammonia-fueled gas turbine is recycled back to supply heat to the ammonia cracker reactor.

The invention relates to the field of catalysts, and provides a cobalt-based catalyst and a preparation method and application thereof. The cobalt-based catalyst is obtained by in-situ activation of spinel structure oxide MaAlbCocO4, Co is an active component, and M is an auxiliary metal including alkaline earth metal or rare earth metal. According to the preparation method of the catalyst, a co-precipitation-roasting-in-situ activation process is adopted, and uniform dispersion and structural stability of the active component Co and the auxiliary metal are achieved. The catalyst shows good low-temperature ammonia decomposition activity at the air speed of 30 Lgcat <-1 > h <-1 >, and the ammonia conversion rate at 600 DEG C reaches 99.3% or above.