625results about "Hydrogen separation by diffusion" patented technology

To provide a system, a method, and an application for carbon recovery system for compact type vessel based on connection between methanol reforming and high-efficiency membrane separation.SOLUTION: Propulsive power is supplied to a vessel by using a methanol aqueous solution as a raw material through steps such as reforming, separation of a reformate product, and hydrogen combustion, hydrogen fuel is manufactured through methanol steam reforming, anxiety about safety of high pressure hydrogen storage in a prior art is eliminated, efficient carbon recovery is carried out by storing separated carbon dioxide by compression and liquefying, heat is supplied for methanol steam reforming and preheating of the fuel by using excess heat of discharged flue gas, and comprehensive use of energy is achieved. Use of hydrogen energy is realized by a vessel without requiring storage and transportation of hydrogen, and a shipping industry contributes to green, low carbon, and sustainable development.SELECTED DRAWING: Figure 1

A fuel reforming system for a vehicle on which a reciprocating engine is mounted is provided can comprise a decomposer to decompose hydrocarbon fuel into carbon and hydrogen gas by using heat and a pressure of combustion gas and a catalyst and to hold carbon. The decomposer can communicate with a combustion chamber via an openable / closable third port. A reforming space in which a reforming member including the catalyst is installed can be on the side of a connection portion of the decomposer with the third port. On an opposite side of interior of the connection portion of the decomposer with the third port, an additional space is provided to accommodate residual gas that remains in the third port and the decomposer when combustion gas is introduced into the decomposer through the third port.

A process to purify helium from a feed gas stream containing a mixture of at least nitrogen, methane and helium including introducing the feed gas stream into a first helium membrane separation unit, thereby producing a first helium membrane permeate and a first helium membrane residue; introducing at least part of the first residue into a first nitrogen membrane separation unit thereby producing a first nitrogen membrane permeate stream; introducing a stream derived from the first helium membrane permeate into a hydrogen PSA unit thereby producing a helium rich product stream. Wherein a stream derived from the first nitrogen membrane permeate stream exits the system as a fuel gas product stream. Wherein the feed gas stream has a higher heating value, and wherein the first nitrogen membrane permeate stream has a higher heating value at least 5% higher than the higher heating value of the feed gas.

A separation membrane for hydrogen and a gas L (excepting hydrogen), wherein the activation energy Ep(S) (kJ / mol) for a hydrogen permeance P(S) (mol / (m2∙s∙Pa)) through the separation membrane, as derived within a temperature Tam (°C) range satisfying the following expression (1-I), and the activation energy Ep(L) (kJ / mol) for a gas L permeance P(L) (mol / (m2∙s∙Pa)) through the separation membrane, as derived within the same temperature range, satisfy the following expression (1-II).　(1-I): 5(°C)≤Tam(°C)≤200(°C)　(1-II): |Ep(L)|<|Ep(S)|　The present invention can provide a separation membrane, a separation membrane layered body, a separation module or separation tower, a hydrogen recovery system, and a hydrogen separation and recovery method that are for separating and recovering hydrogen and in which hydrogen can be separated and recovered in a safe and highly efficient manner, even with a relatively low-pressure supply, from a mixed gas comprising molecules that are relatively close in kinetic diameter, one example being the separation and recovery of hydrogen from a hydrogen-oxygen mixed gas.

The invention relates to the technical field of chemical catalysis, in particular to a copper-silicon catalyzed cyclohexanol gradient dehydrogenation and hydrogen recycling method which comprises the following steps: step 1, preparing a gradient catalyst, namely carrying out surface hydroxyl regulation pretreatment on porous silica gel, and loading a copper salt solution by adopting a step-by-step impregnation method to form gradient distribution with gradually decreased copper loading capacity from outside to inside, carrying out segmented heating reduction in a reducing atmosphere containing 5vol% of H2 / N2; 2, gradient dehydrogenation reaction process control; and 3, hydrogen in-situ separation and cyclic utilization: separating hydrogen from the reaction outlet gas through a palladium alloy membrane, controlling the pressure difference of the two sides of the membrane to maintain the permeation flux, returning the separated hydrogen to the inlet of the reactor to adjust the hydrogen partial pressure, and storing the residual hydrogen. Through gradient catalyst preparation, accurate reaction process control and efficient hydrogen recovery technologies, the cyclohexanone production efficiency is improved, and long-term stability of the catalyst and efficient recycling of hydrogen are achieved.

A method for stimulating hydrogen production from an injection formation. This method includes the steps of providing a well traversing a subsurface into an injection formation containing hydrocarbons. Carbon dioxide, water, steam, and combustion gas are introduced into the injection formation via the well. Further, the injection formation is stimulated using one or more of infrasonic, sonic, and ultrasonic stimulation. The injection formation is monitored via one or more sensors located in the injection formation to determine one or more properties of reactions in the injection formation and the flow back effluent. Flowback operations are conducted to retrieve flowback effluent.

The invention relates to an external field intelligent regulation and control photocatalytic hydrogen production integrated device and system. The device comprises a Fresnel lens; the double-layer vacuum glass tube comprises an outer-layer glass tube, an inner-layer glass tube and a vacuum layer located between the outer-layer glass tube and the inner-layer glass tube, and the inner-layer glass tube is connected with an external water source and the separation module; the Helmholtz coil comprises two conductor coils, and the two conductor coils are symmetrically arranged at the two ends of the outer-layer glass tube in a sleeving mode and are communicated with an external power source; the photocatalyst is arranged in the inner-layer glass tube and is positioned at a strip-shaped light band of the sunlight focused by the Fresnel lens; the separation module comprises a hydrogen separation membrane and a gas outlet and is used for efficiently separating gas generated by reaction; the Fresnel lens is connected with the double-layer vacuum glass tube through the fixing support and located on the upper side of the double-layer vacuum glass tube. The Helmholtz coil is used for generating a magnetic field to improve the photo-generated charge separation efficiency in the photocatalytic reaction process, so that the hydrogen production efficiency is improved. The efficiency of photocatalytic reaction hydrogen production can be improved through precise regulation and control of an external field.

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.

The invention modernizes abandoned or inefficient petrochemical plants for the production of jet fuel, diesel, naphtha, drilling fuels and wax. It utilizes an amine system shifted in a brownfield situation and a PRISM unit to cleanse incoming syngas and obtain an optimal H2:CO ratio for conversion. The refit and repurposing introduces novel heat transfer elements to a Fischer-Tropsch (FT) reactor and embarks a proprietary FT catalyst for the production of GTL products. It also incorporates unique FT analyzers to monitor hydrocarbon streams and aid production and Coriolis flow meters for precise measurements of liquid wax flow, unaffected by wax congestion or vibration. Feedstocks include numerous sources such as Natural gas, Biomass, etc

The invention belongs to the field of ammonia cracking hydrogen production devices, and particularly relates to an ammonia catalytic cracking hydrogen production device based on engine exhaust waste heat utilization, a control system and a control method.The ammonia catalytic cracking hydrogen production device comprises an ammonia catalytic cracking hydrogen production system, a nitrogen-hydrogen separation system and a working condition control system; the ammonia catalytic cracking hydrogen production system comprises an exhaust pipe, and an ammonia gas cracking pipe and a heat insulation pipe which sequentially wrap the outer wall of the exhaust pipe; the ammonia gas cracking pipe comprises an ammonia gas inlet and a cracking mixed gas outlet, and a gap is reserved between the inner wall of the ammonia gas cracking pipe and the outer wall of the exhaust pipe and used for circulation and cracking of ammonia gas; the nitrogen-hydrogen separation system comprises a hydrogen separation unit, a nitrogen separation unit and an ammonia gas recovery unit; the cracking mixed gas outlet is connected with the hydrogen separation unit; the ammonia gas recovery unit comprises an ammonia water heating bin, and the exhaust pipe penetrates through the ammonia water heating bin. Ammonia gas cracking and nitrogen-hydrogen separation are completed by fully utilizing engine tail gas waste heat, the cost and energy consumption are remarkably reduced, and hydrogen supply for promoting efficient and reliable combustion of the ammonia engine can be obtained.

A plant and process for producing a hydrogen rich gas are provided, said process comprising the steps of: steam reforming a hydrocarbon feed into a synthesis gas; shifting the synthesis gas and conducting the shifted gas to a hydrogen purification unit, subjecting CO2-rich off-gas from the hydrogen purification unit to a carbon dioxide removal and recycling CO2-depleted off-gas rich in hydrogen to the process.

The invention discloses a hot CO2-assisted electromagnetic heating in-situ carbon storage and hydrogen production synergistic method, belongs to the technical field of oil and gas reservoir in-situ carbon storage and hydrogen production, and solves the problem that CO2 and other gases can be generated during oxygen injection combustion reservoir in-situ hydrogen production at present. The method comprises the following steps: selecting a target reservoir, digging a well and distributing hydrogen production collaborative equipment, transforming and developing the target reservoir based on the type of the target reservoir, injecting high-temperature CO2, starting a microwave emission device of an electromagnetic heating hydrogen production and hydrogen production well to continuously heat the reservoir to a hydrogen production temperature, and keeping the current reservoir temperature and pressure condition to produce hydrogen. Starting an electromagnetic heating hydrogen production and hydrogen production well for production; closing the well to stop production when the hydrogen yield is rapidly reduced; according to the invention, the production of CO2 gas in the hydrogen production process is avoided, and multiple injection processes of oxygen-containing gas, water vapor and the like are simplified at the same time; the electromagnetic heating cost is reduced by injecting high-temperature CO2 to preheat the reservoir, and meanwhile, the utilization and geological storage of CO2 can be realized, so that the synergistic effect of geological storage of CO2 and in-situ hydrogen production is ensured.

A method for recovering waste heat and water vapor from a dryer system integrated in a hydrogen plant is described. The method includes receiving regeneration gas from a downstream unit of the hydrogen plant; using heat from the hydrogen plant to heat at least a part of the regeneration gas and form spent regeneration gas through a heating step and a cooling step; recycling spent regeneration gas back to the hydrogen plant that uses heat from the spent regeneration gas; and using desorbed water in the spent regeneration gas as process steam in the hydrogen plant.

The present invention discloses a method for selecting a target palladium membrane, a method for performing a hydrogen-related reaction, and a method and system for determining permeation and diffusion rates. The selection method includes the steps of determining the target lattice parameters and target metal composition and their proportions of the target palladium membrane from the target permeation and diffusion rate of hydrogen gas through the target palladium membrane, the target thickness of the target palladium membrane, and the correspondence between the target permeation and diffusion rate of hydrogen gas through a sample palladium membrane and a specific parameter set of the sample palladium membrane, and selecting a palladium membrane having the target lattice parameters, the target metal composition and its proportions, and the target thickness as the target palladium membrane. The present invention allows for efficient and convenient selection of an appropriate palladium membrane that satisfies the target hydrogen gas permeation and diffusion rate of a hydrogen-related reaction, conveniently measuring the hydrogen gas permeation and diffusion rate of the palladium membrane, and accurately controlling the progress of the hydrogen-related reaction.

The invention discloses a system for efficiently utilizing biomass to prepare green methanol. The system comprises a biomass pyrolysis unit, a synthesis gas preparation unit, a hydrogen-carbon ratio adjusting unit and a green methanol synthesis unit, the biomass is conveyed to a biomass pyrolysis unit to be subjected to a pyrolysis reaction, then gas-solid separation is conducted, and biochar and biomass pyrolysis gas are obtained; conveying the biochar and fresh water and / or seawater to a synthesis gas preparation unit for water gas reaction to obtain synthesis gas and co-production by-products; the synthesis gas and the biomass pyrolysis gas are fed into a hydrogen-carbon ratio adjusting unit to adjust the ratio of hydrogen-carbon components in the synthesis gas and the biomass pyrolysis gas, so that the ratio meets the stoichiometric hydrogen-carbon molar ratio requirement required by the green methanol synthesis reaction; the synthesis gas and the biomass pyrolysis gas meeting the hydrogen-carbon molar ratio are conveyed to a green methanol synthesis subunit for a methanol synthesis reaction, and green methanol is obtained; in the green methanol, carbon atoms come from biomass, and hydrogen atoms come from biomass, fresh water or seawater.

The invention belongs to the technical field of separation membrane preparation, particularly relates to a device and a method for preparing a separation membrane for hydrogen production by electrolysis of water, and aims to solve the problems that multiple raw materials need to be preliminarily mixed in the preliminary mixing process of separation membrane preparation raw materials, and the multiple raw materials cannot be uniformly mixed easily by the existing preparation device, so that the separation membrane preparation cost is low. In order to make unmixed slurry tiled above a bearing membrane and reduce the use effect of the produced separation membrane, the invention provides the following scheme that the device comprises U-shaped tool moving frames, one sides of the two U-shaped tool moving frames are connected with the same tool preparation plate through bolts, and a mixing module is arranged on the upper side of the tool preparation plate. According to the device and method for preparing the separation membrane for hydrogen production by electrolysis of water, when multiple raw materials are mixed, the multiple raw materials are uniformly mixed, non-uniform mixing of the raw materials is avoided, and the use effect of the prepared and produced separation membrane is improved.

The invention belongs to the technical field of covalent organic framework membrane materials, and provides a covalent organic framework / polyether sulfone mixed matrix membrane as well as a preparation method and application thereof. The method comprises the following steps: mixing polyether sulfone, a solvent and trialdehyde phloroglucinol to obtain a trialdehyde phloroglucinol solution; the glass fiber filter membrane is coated with the trialdehyde phloroglucinol solution, and a trialdehyde phloroglucinol / polyether sulfone membrane is obtained; the method comprises the following steps: mixing p-phenylenediamine, a catalyst and water to obtain a p-phenylenediamine solution; the trialdehyde phloroglucinol / polyether sulfone membrane is soaked in a p-phenylenediamine solution for a reaction, and the covalent organic framework / polyether sulfone mixed matrix membrane is obtained. The preparation method disclosed by the invention is mild in condition, the obtained membrane is uniform and stable, the advantages of high flux of a polymer and strong adsorption and separation of a covalent organic framework on CO2 are fully combined, and the H2 flux and H2 / CO2 selectivity of the covalent organic framework / polyether sulfone mixed matrix membrane are greatly improved.

The disclosure relates to adapters, systems, and methods to connect a metal component and a ceramic component. The systems and methods generally include a metal header, a header seal and a zirconia toughened alumina (ZTA) header.

The invention discloses an ultrathin polymer biphase hydrogen separation membrane with a porous structure and a preparation method and application thereof, and relates to the technical field of hydrogen separation membrane preparation, and the preparation method specifically comprises the following steps: S1, preparing a polybenzimidazole homogeneous solution; s2, preparing a membrane casting solution; s3, preparing a proton-electron mixed conductive layer; s4, immersing the proton-electron mixed conductive layer into methanol for a period of time at room temperature, and then carrying out vacuum drying to obtain a proton-electron mixed porous conductive layer; and S5, loading a Pt particle catalyst on two sides of the membrane of the proton-electron mixed porous conductive layer, the junction of the porous layer and the compact layer and the inner surface of a porous channel of the porous layer through an ion sputtering method to obtain the ultrathin polymer biphase hydrogen separation membrane with the porous structure. According to the ultrathin polymer biphase hydrogen separation membrane with the porous structure, the 100% selectivity of hydrogen is guaranteed, and the permeation flux of hydrogen is improved.

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 welded joint between a metallic connector and at least a metallic core of a metallic hydrogen separation membrane comprising a fusion weld formed from and between the metallic connector and at least the metallic core of the metallic hydrogen separation membrane, wherein the connector may be formed of a different metal or metal alloy to the metallic core of the hydrogen separation membrane, and wherein the fusion weld includes a sealing portion that provides a continuous seal between the metallic connector and at least the metallic core of the metallic hydrogen separation membrane and the weld metal of the sealing portion comprises less than 40% by mass of metal from the metallic core of the metallic hydrogen separation membrane.

The invention relates to a process (100, 100', 100") and an apparatus for producing a hydrogen-containing product, wherein, in a production operating mode, an ammonia feed (1, 2) is reacted with catalytic assistance in an ammonia cracker (20), to which heat is supplied, to obtain a cracking gas (3, 4) containing ammonia, hydrogen, and nitrogen. A characteristic feature is that the ammonia cracker (20) can also be operated in a standby operating mode, wherein the cracking gas (3, 4) or a portion thereof is recycled as feed to the ammonia cracker (20).

The invention belongs to the technical field of gas membrane separation, and discloses a preparation method of a fluorinated MOFs (Metal-Organic Frameworks) mixed matrix membrane for efficiently extracting hydrogen / helium from natural gas. CF3 is introduced into an MOFs framework to prepare fluorinated MOFs, and introduction of CF3 reduces the aperture of MOFs, enhances the molecular sieving effect, and improves the diffusion selectivity of H2 (He) / CH4. In addition,-CF3 has an inhibition effect on CH4 adsorption, and the dissolution selectivity of H2 (He) / CH4 separation is improved. The existence of-CF3 in the fluorinated MOFs can induce the MOFs and the polymer to form dipole-dipole interaction (C-F... O = C), so that the filler and the polymer have good interfacial compatibility, the improvement of the filler loading capacity is facilitated, and meanwhile, the generation of non-selective defects at an interface is avoided. The mixed matrix membrane prepared by the method has important significance in the field of high-efficiency hydrogen / helium extraction of natural gas.

The invention belongs to the technical field of gas separation, and particularly relates to a method for separating and purifying hydrogen from middle and low pressure hydrogen-doped natural gas. According to the method, a membrane separation process and a pressure swing adsorption process are coupled for purifying hydrogen. In order to solve the technical problems of low hydrogen doping proportion, high purification difficulty and the like in the middle-low pressure hydrogen-doped natural gas, a membrane separation and pressure swing adsorption combined process flow is adopted, hydrogen is separated and concentrated from the hydrogen-doped natural gas by using a membrane separation method, then the hydrogen is purified by using a pressure swing adsorption method, the purity of the obtained hydrogen can reach 99.999%, and the purity of the obtained hydrogen can reach 99.999%. And the requirements of high-purity hydrogen and hydrogen for fuel cell vehicles are met.

A process for synthesising methanol is described comprising the steps of (i) reforming a hydrocarbon feedstock in a hydrocarbon reforming unit comprising a fired heater and an autothermal reformer in series to form a synthesis gas containing hydrogen, carbon monoxide and carbon dioxide; (ii) dividing the synthesis gas into a first portion and a second portion, (iii) converting the first portion of synthesis gas into a methanol product in a methanol synthesis unit comprising one or more methanol synthesis reactors; and (iv) recovering a purge gas stream from the methanol synthesis unit, wherein the second portion of synthesis gas is passed to a hydrogen production unit where it is subjected to one or more stages of water gas shift in a water-gas shift unit to form a hydrogen-enriched gas, the a hydrogen-enriched gas is subjected to a step of carbon dioxide removal in a carbon dioxide removal unit to form a hydrogen product stream and a carbon dioxide stream, the carbon dioxide stream is recovered and at least a portion of the hydrogen product stream is fed to the fired heater as a fuel.

A system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and / or altering the process conditions to alter the output composition.

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.

The present disclosure relates to the field of catalytic reactors, specifically to a low-temperature catalytic methane splitting reactor operating between 500°C and 650°C. The reactor is designed for the continuous production of high-purity hydrogen and graphitic carbon, with no CO₂ emissions, using a novel combination of supported catalysts, reaction module, and a membrane-based gas separation system.

A method and a system for the coproduction of hydrogen, electrical power, and heat energy. An exemplary method includes desulfurizing a feed stream to form a desulfurized feed stream, reforming the desulfurized feed stream to form a methane rich gas, and providing the methane rich gas to a membrane separator. A hydrogen stream is produced in a permeate from the membrane separator. A retentate stream from the membrane separator is provided to a solid oxide fuel cell (SOFC). Electrical power is produced in the SOFC from the retentate stream.

Hydrogen purification devices and their components are disclosed. In some embodiments, the device can include at least one foil microscreen assembly disposed between and coupled to a first end frame and a second end frame. The at least one foil microscreen assembly can include at least one hydrogen-selective membrane and at least one microscreen structure including a non-porous planar sheet having a plurality of apertures forming a plurality of fluid passages. The planar sheet can include generally opposing planar surfaces configured to provide support for the permeate side. The plurality of fluid passages can extend between the opposing surfaces. The at least one hydrogen-selective membrane can be metallurgically bonded to the at least one microscreen structure.