3557results about "Hydrogen" patented technology

The invention discloses a carbon nitride-based composite material as well as a preparation method and application thereof. The carbon nitride-based composite material comprises a non-metal doped carbon nitride carrier and a noble metal, wherein the noble metal exists in the carrier in an element doping form and / or is loaded on the carrier in an oxide form; the precious metal is one or more of Pt, Pd, Au and Ru, and the nonmetal is one or more of P, S and I. According to the carbon nitride composite material disclosed by the invention, noble metal is utilized to modify carbon nitride, the number of surface active sites is increased, the electron and chemical structures of an active center are adjusted, and meanwhile, generation and migration of photo-generated charges are promoted. Meanwhile, the surface of the carbon nitride composite material is modified by non-metallic elements, so that adsorption and activation of reactant H2O molecules are effectively promoted. The catalyst disclosed by the invention is simple in preparation process, good in repeatability and easy for large-scale production.

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 belongs to the technical field of underground hydrogen storage, and particularly relates to a method for improving underground hydrogen storage capacity by stabilizing hydrogen foam through a porous carbon material, which comprises the following steps: step 1, preparing a hydrophobic modified porous carbon material: preparing the porous carbon material by using biomass waste as a raw material through a carbonization-activation process; carrying out hydrophobic modification treatment on the porous carbon material to enable the water contact angle of the material to reach more than 90 degrees; step 2, preparing a surfactant solution; step 3, preparing a porous carbon-surfactant composite system; and fourthly, hydrogen foam is generated and injected, wherein hydrogen and the porous carbon-surfactant composite system are fully mixed according to the gas-liquid volume ratio of 1: 1-10: 1, and then the mixture is injected into the stratum. By means of the method, the stability of hydrogen foam can be remarkably improved, the hydrogen storage efficiency and the hydrogen recovery rate are improved, and therefore the underground hydrogen storage amount is greatly increased.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses a green synthesis ammonia and organic liquid hydrogen storage combined device. The device comprises a water electrolysis hydrogen production device, a nitrogen production device, an organic liquid hydrogen storage device, a low-pressure gas compressor, a synthesis gas compressor and an ammonia synthesis device, the water electrolysis hydrogen production device produces hydrogen and conveys the hydrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the nitrogen making device is used for making nitrogen and conveying nitrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the organic liquid hydrogen storage device reacts hydrogen-poor organic liquid with hydrogen generated by the water electrolysis hydrogen production device to generate hydrogen-rich organic liquid, nitrogen is introduced into the hydrogen-rich organic liquid for dehydrogenation reaction, and the hydrogen and the nitrogen are input into the low-pressure gas compressor; the low-pressure gas compressor and the synthesis gas compressor compress hydrogen and nitrogen and input the compressed hydrogen and nitrogen into the ammonia synthesis device; and the ammonia synthesis device generates ammonia under the action of the catalyst. The gas-liquid mass transfer efficiency and the hydrogen desorption rate are improved, the energy consumption and the operation and maintenance cost of the compressor are reduced, and accurate adjustment of the hydrogen-nitrogen ratio is achieved.

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a hydrogen storage material, a preparation method thereof and a hydrogen storage system. The hydrogen storage material comprises the following raw material components in percentage by mass: 90%-97.5% of hydrogen storage alloy powder, 1%-5% of a volume expansion buffering agent, 1%-5% of a heat conduction material and 0.5%-3% of an additive, the additive comprises at least one of a silane coupling agent and polyimide; the preparation method comprises the following steps: mixing the raw material components, carrying out cold press molding, carrying out heat treatment for 4-12 hours in an inert atmosphere at the temperature of 110-150 DEG C, and cooling to obtain the hydrogen storage material.

The invention belongs to the technical field of hydrogen energy, and particularly relates to a solid hydrogen storage system with two charging and discharging ends and a working method.The solid hydrogen storage system comprises at least two independent solid hydrogen storage units, and each solid hydrogen storage unit independently communicates with an upstream hydrogen supply pipeline through a first valve set and independently communicates with a downstream hydrogen using pipeline through a second valve set; each solid hydrogen storage unit is selectively communicated with the thermal circulation loop or the cold circulation loop through a third valve group; the first valve group, the second valve group and the third valve group are controlled, so that when the upstream hydrogen supply pipeline has a hydrogen supply demand and the downstream hydrogen use pipeline has a hydrogen use demand, the first solid hydrogen storage unit is configured to be in a hydrogen charging mode, and meanwhile, the second solid hydrogen storage unit is configured to be in a hydrogen discharging mode; the solid hydrogen storage unit in the hydrogen charging mode is communicated with the upstream hydrogen supply pipeline and the cold circulation loop for charging hydrogen, and the solid hydrogen storage unit in the hydrogen discharging mode is communicated with the downstream hydrogen supply pipeline and the hot circulation loop for discharging hydrogen.

The invention discloses a preparation method of a high-capacity magnesium-based composite material based on MOF structure modification, and belongs to the technical field of hydrogen storage materials, the preparation method comprises the following steps: (1) preparing an M-MOF guest material; (2) modifying an aperture structure of the M-MOF guest material; and (3) preparing the MgH2 (at) S-M-MOF compound by a wet impregnation nano confinement method. Compared with a pure MgH2 hydrogen storage material, the MgH2 (at) S-M-MOF compound magnesium-based hydrogen storage material prepared by the nano confinement method has the advantages that the hydrogen absorption and desorption reaction temperature is obviously reduced, and the dynamics is greatly improved; compared with a traditional nano confinement hydrogen storage material preparation process, the preparation method has the advantages that the comprehensive hydrogen storage performance of a compound is enhanced by modifying a pore structure and introducing catalytic elements, the operability is high, the effective loading rate is high, the preparation period is short, and the yield is high; the required raw materials are cheap and easy to obtain, and the preparation process is low in cost, high in safety and suitable for industrial production and popularization.

The invention relates to a Y-doped Ti-Mn-based solid hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and has the advantages of easiness in activation, high hydrogen absorption and desorption speed, moderate hydrogen absorption and desorption plateau pressure and long cycle life. The invention provides a Y-doped Ti-Mn-based hydrogen storage alloy, which is characterized in that the chemical general formula of the hydrogen storage alloy is Ti1-x-yYxZryMn2-w-vVwFev, in the formula, x, y, w and v represent atomic ratios, 0.02 < = x < = 0.08, 0.05 < = y < = 0.15, 0.3 < = w < = 0.5, and 0.1 < = v < = 0.2. The hydrogen storage alloy is excellent in hydrogen storage performance and can be completely activated by absorbing hydrogen for the first time under the conditions of 25 DEG C and 3 MPa, the hydrogen storage capacity is larger than or equal to 1.90 wt%, the hydrogen absorption plateau pressure is larger than or equal to 0.35 MPa, the hydrogen desorption plateau pressure is smaller than or equal to 0.26 MPa, and the hydrogen absorption retention rate of the alloy is larger than or equal to 97.52% after the alloy is cycled for 1000 times.

The invention relates to the technical field of chemical looping hydrogen production, in particular to an integrated chemical looping hydrogen production device which comprises an oxygen carrier mechanical lifting pipe (1), an oxygen carrier feeding pipe (2), an integrated chemical looping hydrogen production reactor (3) loaded with oxygen particles, an oxygen carrier discharging pipe (14) and an oxygen carrier feeding dipleg (4). A discharge port of the oxygen carrier feed pipe (2) is connected with a feed port of the oxygen carrier feed leg (4), and a discharge port of the oxygen carrier discharge pipe (14) is connected with a feed port of the oxygen carrier mechanical lifting pipe (1); the oxygen carrier mechanical lifting pipe (1), the oxygen carrier feeding pipe (2), the oxygen carrier discharging pipe (14) and the oxygen carrier feeding dipleg (4) are all connecting pipes; the integrated chemical-looping hydrogen production reactor (3) is integrally a vertical barrel with a flat top and a funnel-shaped bottom. The invention further relates to application of the integrated chemical-looping hydrogen production device.

The present application provides a solid-state hydrogen storage material and a preparation method and application thereof. Specifically, the preparation method comprises the following steps: (1) ball-milling a magnesium-based alloy powder, a light metal hydride, a nano-carbon material, a composite catalyst powder and an interface modifier to obtain a mixed powder; and (2) sintering the mixed powder under vacuum at 200-350 DEG C for 2-5 hours to obtain a sintered body, wherein: the magnesium-based alloy powder is a Mg-Mn-Al alloy powder; the light metal hydride is a mixture of LiAlH4 and NaBH4; the nano-carbon material is selected from one or more of graphene and carbon nanotubes; the composite catalyst powder is a mixture of TiO2, Fe3O4, CeO2 and La2O3; and the interface modifier is selected from one or more of a silane coupling agent and a titanate coupling agent. The solid-state hydrogen storage material has high hydrogen storage capacity, fast hydrogen absorption and desorption rate and good cycle stability.

The invention discloses a double-vacancy ZnCdS solid solution photocatalyst and a preparation method and application thereof.The preparation method comprises the steps that a cadmium source, a zinc source and a sulfur source are added into absolute ethyl alcohol to be stirred and dissolved, the mass ratio of the cadmium source to the zinc source to the sulfur source is 1: 9: 3, a reaction is conducted under the water bath condition of 70-90 DEG C, suction filtration, washing and drying are conducted, and a powdery ZnCdS solid solution is obtained; the preparation method comprises the following steps: adding NaOH into water, stirring and dissolving, then adding the powdery ZnCdS solid solution, carrying out ultrasonic treatment, and carrying out suction filtration, washing and drying to obtain the double-vacancy ZnCdS solid solution photocatalyst. The preparation method has the advantages of being high in hydrogen production rate, good in repeatability and stability, simple and convenient to prepare, low in cost and the like, the obtained double-vacancy ZnCdS solid solution photocatalyst can be applied to the field of photocatalytic hydrogen production, and the hydrogen production efficiency reaches up to 12.69 mmol.g <-1 >. H <-1 > and is 23.94 times that of pure ZnS and 11.64 times that of pure CdS.

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.

The present disclosure relates to the technical field of solid-state hydrogen storage materials, and specifically provides a magnesium-based hydrogen storage material based on a core-shell structure, a preparation method therefor, and use thereof. The magnesium-based hydrogen storage material based on a core-shell structure provided by the present disclosure comprises a hydrogenated combustion product of Ni / Fe3O4@MIL and MgH2, wherein Ni / Fe3O4@MIL is a material having a core-shell structure. An inner core of Ni / Fe3O4@MIL comprises Ni-loaded Fe3O4 microspheres, and an outer shell of Ni / Fe3O4@MIL comprises an organic ligand. The magnesium-based hydrogen storage material based on a core-shell structure significantly improves the hydrogen storage performance of magnesium hydride, and can still maintain a high hydrogen absorption capacity at a low temperature.

The invention provides bionic fractal micro-channel reactor equipment for fluid fuel hydrogen production, which is particularly suitable for marine mobile hydrogen production scenes such as a ship power system and an offshore hydrogen refueling station. The microreactor adopts an upper, middle and lower layer functional structure design, and comprises a diversion diffusion area, a chemical reaction area and a product buffer collection area, the diversion diffusion area and the product buffer collection area are fractal tree-shaped microchannels with optimal continuous length ratio and mass diffusion flux, and the diffusion resistance of reactants can be remarkably reduced. By virtue of the characteristics of compact structure, vibration resistance and easiness in integration of the fractal microchannel, uniform distribution and efficient transportation of reactants are realized, heat and mass transfer performance can be enhanced under harsh working conditions of the ocean, and hydrogen production efficiency and system reliability are improved by combining efficient heat source supply and fuel conversion processes; and the requirements of an ocean mobile platform on efficient, compact and stable hydrogen production equipment are met.

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 desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid containing moisture and the sulfur compound, the desulfurizing agent comprising: at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions; and an organic ligand coordinated to a metal ion, the organic ligand containing isophthalic acid optionally having a substituent group at the 5-position of a benzene ring, and diffraction peaks respectively present in the range of diffraction angles of 10.9 DEG + / -0.3 DEG and the range of diffraction angles of 18.1 DEG + / -0.3 DEG in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-K alpha rays.

The invention relates to the technical field of methanol cracking hydrogen production, in particular to a process and a system for methanol cracking hydrogen production. Raw material methanol liquid is conveyed to a heat exchanger from a methanol storage tank through a metering pump and is heated and preheated through heat exchange of the heat exchanger, and the preheated raw material methanol liquid is conveyed into a methanol vaporizer to be vaporized into methanol steam; methanol steam enters a reactor and is catalyzed by a catalyst, a cracking reaction is carried out, high-temperature converted gas of hydrogen and carbon monoxide is generated, the high-temperature converted gas is conveyed to a product end after being subjected to heat exchange and cooling by a heat exchanger, the high-temperature converted gas is used as a heat source to exchange heat with fed methanol, and the converted gas is cooled while the methanol is preheated, so that energy complementation is realized; and the process ensures that methanol is fully vaporized, the temperature of the reactor is controlled at the optimal temperature for direct methanol cracking, and the direct methanol cracking reaction is sufficient and less in side reaction under the catalysis of a copper-based catalyst with high activity and good selectivity.

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.

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.

The invention relates to the technical field of hydrogen storage alloys, in particular to a Ti-based hydrogen storage alloy and a preparation method and application thereof. The chemical formula of the Ti-based hydrogen storage alloy is TibZr (1.02b) CrcMn (1.6 c) Fe 0.4, b is larger than or equal to 0.92 and smaller than or equal to 0.95, and c is larger than or equal to 1.0 and smaller than or equal to 1.2. According to the invention, Ti or Cr is doped into a Ti0. 92Zr0. 1Cr1. 0Mn0. 6Fe0. 4 alloy matrix, and regulation and control of unit cell parameters and electronegativity are realized by means of alloying, so that the hydrogen compression material has a higher compression ratio, and the alloy crystal structure is stable, and has more excellent activation performance, longer cycle life and higher cycle stability.

The preparation method of the Ni-Mn bimetallic oxide modified magnesium-based hydrogen storage composite material comprises the steps that 1, under the protection of an argon atmosphere, pure magnesium powder is placed in a reaction kettle, and a product MgH2 is obtained; step 2, dissolving nickel nitrate hydrate and manganous nitrate hydrate in absolute ethyl alcohol, adding urea into the mixed solution, continuously stirring at room temperature, and then carrying out constant-temperature reaction in a tetrafluoropolyvinyl chloride high-pressure reaction kettle in a drying oven; after the reaction is finished, cooling to room temperature, and carrying out centrifugal washing; supernate obtained after centrifugal washing is poured out, precipitates are reserved and transferred into a vacuum drying box, and vacuum drying is conducted; grinding a block obtained after drying, and transferring the block into a tubular furnace for heat treatment to obtain a bimetallic oxide NiMn2O4; 3, MgH2, NiMn2O4 and stainless steel ball milling beads are weighed and put into a mechanochemical reaction ball milling kettle, intermittent ball milling is conducted for a certain time under the protection of a specific atmosphere, and then a composite sample MgH2-NiMn2O4 is collected. The practical application benefit of the magnesium-based hydrogen storage technology can be greatly improved.

The present application discloses coal seam natural gas decarburization hydrogen production process and automation control system, relates to hydrogen production technical field, and decarburization hydrogen production unit includes: reactor including reaction zone, reaction zone is equipped with reaction tank; The present application adds the catalyst of setting amount to the reaction tank through the feeding part, improves the natural gas hydrogen production efficiency; A plurality of natural gas inlets which are communicated with the reaction tank are arranged on the reaction tank, and the rate that the natural gas enters the reaction tank and begins to contact and react with the catalyst is accelerated; The reaction tank is uniformly provided with a plurality of natural gas inlets, which makes the natural gas hydrogen production reaction can be fully catalyzed; The first valve is independently arranged between the first valve, and the controller can change the adjustment parameter of the first valve, which makes the catalyst in the reaction tank and the appropriate natural gas in the unit time carry out efficient and sufficient reaction, and the hydrogen production efficiency of natural gas in the present application is improved again.

A method for decomposing ammonia (NH3) to hydrogen (H2) and nitrogen (N2) includes contacting a H2-containing feed gas stream with a carbon material supported metal (M-C) catalyst at a temperature of about 500° C. to form a reduced M-C catalyst; contacting an NH3-containing feed gas stream with the reduced M-C catalyst at a temperature of about 200 to about 600° C. thereby converting at least a portion of the NH3 to H2 and N2, and regenerating the M-C catalyst to form a regenerated M-C catalyst, and producing a residue gas stream leaving the reactor; and separating the H2 from the residue gas stream to generate a H2-containing product gas stream. The regenerated M-C catalyst is substantially free of agglomerated particles and sintered particles.

The utility model discloses a hydrogen storage and supply device and a hydrogen fuel cell heat and power cogeneration system, and relates to the technical field of fuel cells. The hydrogen storage and supply device realizes normal-temperature and normal-pressure storage of hydrogen on the basis of a liquid organic matter hydrogen storage technology, and the principle is that hydrogen storage is realized by virtue of reversible reaction and hydrogenation reaction of unsaturated liquid organic matters such as olefin, alkyne or aromatic hydrocarbon and hydrogen, and hydrogen release is realized by virtue of dehydrogenation reaction. According to the liquid organic matter hydrogen storage technology, the hydrogen storage density is 5%-10%, and the hydrogen storage amount is large; and the hydrogen storage carrier is a liquid organic matter, normal-temperature and normal-pressure transportation can be achieved, convenience and safety are achieved, the requirement for the hydrogen liquid tank is low, and hydrogen leakage is basically avoided during transportation. And during dehydrogenation reaction, the temperature required by hydrogen desorption is low, the energy consumption is low, the hydrogen desorption rate is adjustable, and the hydrogen desorption device can be adapted to various hydrogen fuel cells. The hydrogen fuel cell heat and power cogeneration system collects and utilizes the lost heat of the cell, so that the comprehensive utilization rate of the hydrogen fuel cell is improved.

According to the molecular sieve limited range ammonia cracking hydrogen production catalyst and the preparation method thereof, active components, an alkali source, an organic ligand, a template agent, a silicon source and an aluminum source are utilized to rivet the active components in a molecular sieve, the sizes of cluster particles of the active components are regulated through roasting in a reducing atmosphere, interaction among the active components is increased, and the molecular sieve limited range ammonia cracking hydrogen production catalyst is prepared. Therefore, the catalytic reaction temperature of ammonia cracking hydrogen production is effectively reduced.