269results about "Hydrogen separation" patented technology

The invention relates to the technical field of methanol resource utilization, and discloses a system for preparing methanol based on SOEC-CH4 electrolysis, which is characterized in that a cathode subsystem main body reacts to generate water vapor and H2 mixed gas, the water vapor and H2 mixed gas are condensed and separated to obtain H2, and most of H2 is conveyed to an H2 storage buffer tank and stored; the anode subsystem for preparing CO2 comprises a CH4 tank, an anode subsystem main body and an electrolytic bath anode of an SOEC electrolytic bath which are communicated in sequence, and the anode subsystem main body reacts to generate water vapor, CH4 and CO2 mixed gas; the mixed gas of the water vapor, CH4 and CO2 is subjected to condensation and adsorption separation to obtain CO2, and most of CO2 is conveyed to a CO2 storage buffer tank to be stored; and the methanol preparation subsystem reacts to obtain methanol. According to the system for preparing methanol through electrolysis, methane is introduced to prepare carbon dioxide, the technical problems of high energy consumption and low comprehensive utilization rate of waste heat and wastewater are solved, and cost is greatly reduced to prepare methanol.

The utility model relates to a hydrogen purification system based on magnesium-based hydride, which comprises a buffer tank, a gas inlet of the buffer tank is connected with a discharge end of a hydrogen purification module through a first gas path header pipe, and a vacuum pump is mounted on the first gas path header pipe in a matched manner. An exhaust port of the buffer tank is connected with a feeding end of the hydrogen purification module through a second gas path header pipe, a metal hydrogen storage material is arranged in the hydrogen purification module, and a feeding port of the buffer tank is connected with an exhaust port of the feed gas storage device through a third gas path header pipe. By arranging the hydrogen purification module, hydrogen components in raw material gas can be absorbed based on magnesium hydride, and compared with some traditional physical and chemical purification schemes, the production cost is low; meanwhile, the number of hydrogen storage tanks in the hydrogen purification module can be reasonably set according to purification requirements, the use flexibility is good, the purity of obtained hydrogen is high, no other impurity gas is mixed in the purification process, and the working efficiency of the system is high.

Systems and methods for synthesizing ammonia include one or more electrochemical hydrogen pumps to recover excess hydrogen gas from the ammonia synthesis product stream. The systems and methods improve overall yield and efficiency of the ammonia production process by separating and purifying hydrogen gas that otherwise would be lost.

The invention discloses a cascade energy supply and green hydrogen coupling biomass all-carbon directional conversion synthesis gas system and method, and belongs to the technical field of biomass energy conversion. The system comprises a first-stage gasification furnace, a second-stage gasification furnace, a gas-solid separator, an alkane reforming device, a reverse water-gas shift device and a water electrolysis device. The method comprises the following steps: pyrolyzing a biomass raw material and a catalyst in a primary gasifier (500-700 DEG C) to generate semicoke and tar-containing fuel gas; carrying out catalytic co-gasification on the semicoke and tar-containing fuel gas in a secondary gasifier (800-900 DEG C), and realizing tar cracking and CH4 reforming by using a catalyst to obtain crude synthesis gas; after being subjected to high-temperature dust removal, the crude synthesis gas sequentially passes through a self-heating alkane reforming device (CH4lt; 1%) and a reverse water-gas shift device, and finally synthesis gas with the H2 / CO ratio of 2: 1 is produced, so that the chemical application requirements of methanol, Fischer-Tropsch synthesis and the like are completely met, the high energy consumption bottleneck of a traditional process is broken, and full-life-cycle negative carbon emission is achieved.

The invention is applicable to the technical field of hydrogen production, and provides filtering and purifying equipment for hydrogen production and a purifying method.The filtering and purifying equipment comprises a box body, a barrel body and a drying box which are arranged on a base plate; the first partition plate is fixed in the box body and is used for dividing an inner cavity of the box body into at least two independent filtering treatment chambers; and the gas inlet assembly is correspondingly matched with the filtering treatment chambers and is used for conveying hydrogen to be purified to each filtering treatment chamber. According to the filtering and purifying equipment for hydrogen production and the purifying method provided by the scheme, the box body is divided into at least two independent filtering treatment chambers through the first partition plate, and the valve on the gas inlet pipe is matched, so that when part of the filtering treatment chambers are maintained, other filtering treatment chambers can be utilized to continue working, the downtime of the equipment is greatly shortened, and the working efficiency is improved. The influence on an industrial production process is reduced.

Provided are: a hydrogen separation filter which has a high hydrogen permeation rate and which prevents or reduces separation between layers; and a method for producing the hydrogen separation filter. The hydrogen separation filter includes a porous substrate and a palladium layer provided on the porous substrate. The grain boundary number density observed in a cross-sectional secondary electron image of the palladium layer is 1-5 grains / [mu] m. A method for manufacturing a hydrogen separation filter includes forming a palladium layer on a porous base material by a sputtering method while keeping the temperature of the porous base material at 300-600 DEG C.

The invention belongs to the technical field of methanol hydrogen production, and discloses an online methanol hydrogen production global control system, which comprises a feeding and evaporation unit, a reforming reaction unit, a gas purification and separation unit, a hydrogen storage and supply unit, a multi-source sensor group and a controller, the controller comprises a soft measurement module, a double-layer model prediction control module and a safety degradation module, and the soft measurement module estimates CO concentration in real time based on characteristics such as a temperature field, pressure drop and heating power. The double-layer model predictive control module realizes comprehensive optimization of hydrogen purity, energy efficiency and catalyst life through combination of inner-layer steady-state control and outer-layer economic optimization, and the safety degradation module triggers limited power or inerting purging operation under abnormal conditions. According to the invention, the whole-process optimal control from feeding, reaction, purification to hydrogen supply can be realized, the hydrogen purity and the system efficiency are improved, the CO concentration fluctuation is reduced, the service life of the catalyst is prolonged, and continuous and safe hydrogen supply is still maintained under the condition of sensor failure or operation disturbance.

The invention discloses a biomass pyrolysis and gasification hydrogen production device and method, and belongs to the field of biomass pyrolysis and gasification hydrogen production. The biomass pyrolysis and gasification hydrogen production device comprises a fixed bottom plate, and the top end of the fixed bottom plate is fixedly connected with a biomass pyrolysis gas assembly and a chemical looping hydrogen production assembly; a pyrolysis gas conveying pipe is communicated between the biomass pyrolysis gas assembly and the chemical-looping hydrogen production assembly, the chemical-looping hydrogen production assembly is connected with the cyclone separator, and waste discharge areas of the biomass pyrolysis gas assembly, the chemical-looping hydrogen production assembly and the cyclone separator are all connected with collecting assemblies; according to the biomass pyrolysis gasification hydrogen production device, uniform pyrolysis of raw materials is guaranteed through a dispersion funnel of the biomass pyrolysis reactor, pyrolysis gas makes full contact with an oxygen carrier through the design of inclined gas distribution holes of the chemical looping hydrogen production reaction tank, reaction conditions are further optimized through accurate control over parameters of the oxidation reduction section, and compared with a traditional device, the yield of hydrogen is increased.

The utility model relates to the technical field of condensation recovery, and discloses a condensation recovery device of a nitriding furnace distillation retort, which comprises a reaction furnace with an open bottom and fixed in the air, a sealing bottom cover arranged right below the reaction furnace, a lifting module arranged below the sealing bottom cover, and a uniform air supply structure arranged in the reaction furnace, ammonia gas, hydrogen and other gases are respectively fed into the reaction furnace through the uniform air supply structure; the condensation shunting structure comprises a condensation chamber, is arranged above the reaction furnace and is connected with the reaction furnace through an exhaust pipe, waste gas is converted into hydrogen and ammonia water through the condensation shunting structure, and the hydrogen is recycled; the decomposition and diversion structure comprises a decomposition chamber arranged on one side of the reaction furnace, the top of the decomposition chamber is connected with the condensation chamber through a flow guide pipe, ammonia water is decomposed into ammonia gas and water in the decomposition chamber, and the ammonia gas is recycled. Compared with the prior art, the device disclosed by the utility model has the advantages that the condensation shunting structure is arranged, so that waste gas can be condensed, ammonia water is prevented from flowing back, and hydrogen and ammonia gas are recycled.

The invention discloses a reaction system for producing hydrogen through coal supercritical water gasification. The reaction system comprises a vertical tank body, a heat insulation lining, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe at the lower part of the slag collecting chamber extends out of the vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the coal water slurry distribution pipe; the inlet diffuser is mounted at the bottom head of the vertical tank body; the inlet end of the supercritical water inlet pipe extends out of the bottom head of the vertical tank body to form a supercritical water inlet; a coal water slurry inlet is formed in the coal water slurry distribution pipe; a gas outlet is formed in a top sealing head of the vertical tank body; the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity is realized.

The present invention provides a method for catalytically pyrolyzing a methane-containing stream, comprising at least the steps of: (a) providing a methane-containing stream (10); (b) feeding the gaseous methane-containing stream (10) in the form of gas bubbles into a reaction zone (3) containing molten salt and catalyst particles, the catalyst particles being suspended in the molten salt; (c) subjecting the methane-containing stream to catalytic pyrolysis in the reaction zone (3), thereby obtaining solid carbon and gaseous hydrogen; (d) allowing the molten salt, solid carbon, and gaseous hydrogen to migrate upward from the reaction zone (3) to an intermediate zone (4) while the catalyst particles are retained in the reaction zone (3); and (e) optionally returning a first portion of the molten salt from the intermediate zone (4) to the reaction zone (3) or from an upper portion of the reaction zone (3) via a return loop (6). (f) using an inverted funnel (9) to allow a second portion of the solid carbon, gaseous hydrogen, and molten salt to move further upward from the intermediate zone (4) to the separation zone (5) by gas entrainment; and (g) removing the solid carbon and gaseous hydrogen from the separation zone (5), wherein gas bubbles are broken by a first bubble breaker (7) having an open area of ​​more than 90% when the molten salt, solid carbon, and gaseous hydrogen are moving upward from the reaction zone (3) to the intermediate zone (4) in step (d), and gas bubbles are broken by a second bubble breaker (8) when the molten salt, solid carbon, and gaseous hydrogen are moving upward from the intermediate zone (4) to the separation zone (5) in step (f). [Selected drawing] Figure 1

A process for producing an aldehyde is disclosed. The process comprises: hydroformylating an olefin to form the aldehyde using a hydroformylation catalyst; recovering an effluent stream comprising the aldehyde, hydrogen and the hydroformylation catalyst; passing the effluent stream to a stripper; contacting the effluent stream with a strip gas in the stripper to produce a stripped effluent stream having a lower hydrogen concentration than the effluent stream; and recovering the stripped effluent stream.

A method for purifying a crude hydrogen feed stream utilizes an adsorbent having a N2 / Ar selectivity ranging from 2 to 4 at 30° C. and a Henry's law coefficient for argon ranging from 0.15 to 1.0 mmole / g / atma at 30° C. The composition of crude hydrogen streams from processes in which carbon dioxide is captured necessitates new criteria for adsorbent selection to improve recovery.

A clean filter device and a hydrogen production device. The clean filter device is applied to the hydrogen production device. The clean filter device comprises a filter, a filter element and a separation member, wherein the filter element is mounted in the filter and divides the interior of the filter into an upper cavity and a lower cavity; the lower cavity is provided with a first input channel, and the upper cavity is provided with a gas output channel; the separation member is arranged in the lower cavity corresponding to the position of the first input channel, and the separation member is configured to perform a pre-separation treatment on a gas to be treated entering the lower cavity through the first input channel; and the filter element is configured to filter the gas subjected to the pre-separation treatment and discharge same through the gas output channel. The clean filter device is used for reducing the adverse effects of various metallic and non-metallic solid impurities on electrolytic chemical reactions in electrolytic cells, electrical instruments, and container corrosion, thus optimizing gas purity, and improving the reliability and safety of the operation of the hydrogen production device.

The invention discloses a reaction device for producing hydrogen through coal supercritical water gasification. The reaction device comprises an inner-layer vertical tank body, an outer-layer vertical tank body, a jacket layer of the inner-layer vertical tank body, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe is arranged at the lower part of the slag collecting chamber and extends out of the outer-layer vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the pipe wall; the inlet diffuser is mounted at a bottom sealing head of the inner-layer vertical tank body and directly faces the outlet end of the supercritical water inlet pipe, a gas outlet extending out of the outer-layer vertical tank body is formed in a top sealing head of the inner-layer vertical tank body, and the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity can be realized.

The application relates to the technical field of gas-liquid separation, and provides a device and a method for reducing hydrogen content in oxygen by using a multistage gas-liquid separation technology, which comprises a separator, the inner cavity of the separator is sequentially divided into a first separation cavity and a second separation cavity from top to bottom, and the first separation cavity is communicated with the second separation cavity; a gas-liquid cyclone inner part is arranged in the first separation cavity; a strong centrifugal force field generated by the gas-liquid cyclone inner part is used for making micron-sized bubbles in a hydrogen-electrolyte mixture coalesce and separate, and free-state fine bubbles in the hydrogen-electrolyte mixture are efficiently removed; a throttling device is arranged between the first separation cavity and the second separation cavity, over-saturated dissolved hydrogen in hydrogen-rich electrolyte after first separation in the first separation cavity is depressurized through the throttling device, the hydrogen is actively precipitated by using static pressure drop, and separation is completed in the second cavity, so that the purpose of reducing hydrogen content in oxygen is achieved. The two-stage progressive separation structure significantly improves the hydrogen separation efficiency, and reduces the hydrogen content in oxygen to a low level.

A system for photocatalytic conversion includes a flowline, in which a production flow travels in a flow direction; and a reactor module. The reactor module includes a waveguide; a photocatalyst coupled to the waveguide, configured to convert hydrogen sulfide in the production flow to hydrogen and sulfur; a heater configured to heat a bottom of the reactor module, such that the sulfur is in liquid phase; and a sulfur collector configured to collect the sulfur. A method for photocatalytic conversion includes introducing a production flow from a flowline to a reactor module, the production flow including hydrogen sulfide and traveling in a flow direction; directing a light from a light source to a photocatalyst through a waveguide; converting the hydrogen sulfide into hydrogen and sulfur using the photocatalyst; and heating a portion of the reactor module to an elevated temperature, the sulfur in a liquid phase under the elevated temperature.

The utility model relates to the technical field of hydrogen purification, and discloses an ultralow-temperature hydrogen purifier which comprises a tank body with an opening in the top, an inner tank used for being filled with liquid nitrogen is fixedly installed in the tank body, a heat preservation cavity is formed between the tank body and the inner tank, an upper end cover located at the opening is detachably connected to the tank body, and a lower end cover located at the opening is detachably connected to the upper end cover. A lower end cover located in the inner tank is fixedly installed on the surface of one side of the upper end cover, a partition plate is fixedly installed between the upper end cover and the lower end cover, and a heat preservation cavity is formed between the tank body and the inner tank, so that heat transfer is effectively reduced, the utilization efficiency of liquid nitrogen is improved, meanwhile, the upper end cover and the tank body are detachably connected, and the heat preservation effect is improved. The purification device and the gas purification material are easy to replace and maintain, the maintenance cost is reduced, the closing assembly is further arranged, liquid nitrogen can be manually controlled to enter and exit, and therefore the gas purification material is convenient to replace, and the flexibility is higher.

The invention discloses a device and a method for recycling hydrogen-rich tail gas. The device comprises a dehydrogenation tower and a plate-fin heat exchanger, wherein an inlet of the plate-fin heat exchanger is connected with an outlet in the top of the dehydrogenation tower; an inlet of the tail gas buffer tank is connected with an outlet of the plate-fin heat exchanger; an inlet of the compressor is connected with a top outlet of the tail gas buffer tank; an inlet of the gas separation and purification unit is connected with an outlet of the compressor; an inlet of the hydrogen buffer tank is connected with the top of the gas separation and purification unit; an inlet of the desorbed gas mixer is connected with the bottom of the gas separation and purification unit; an inlet of the reverse deflation buffer tank is connected with the middle part of the gas separation and purification unit; and the desorbed gas mixer is connected with the reverse deflation buffer tank through a fuel gas removal pipe network. According to the present invention, by using the pressure swing adsorption technology, the purification of hydrogen and the regeneration of the adsorbent are achieved under the periodically changing pressure according to the difference of the adsorption capacities of the components in the hydrogen-rich tail gas on the adsorbent;

The present disclosure relates to compositions, systems, and methods that enable the electrochemical conversion of ammonia into hydrogen and nitrogen gases under mild operating conditions, including ambient temperature and pressure. This approach addresses key limitations of conventional ammonia thermal cracking, including the need for high temperatures and pressures and complex downstream gas separation, while overcoming media and catalyst constraints in electrolytic cracking of ammonia.

The present invention relates to a process for producing isocyanates and, optionally, polyurethanes, by at least synthesizing (1) phosgene (20) from carbon monoxide (21) and chlorine (22); reacting (2) phosgene (20) with a diamine (23) to produce a diisocyanate (24) and hydrogen chloride (25); providing a carbon dioxide gas stream (31); and cleaning (4) the carbon dioxide gas stream (31) with additional components, wherein the carbon dioxide is converted by a RWGS reaction (6) to produce carbon monoxide (21) and hydrogen (29), which are used as raw materials for polyurethane production, and optionally reacting (3) the diisocyanate (24) with a polyether polyol (35a) and / or polyester polyol (35b) to produce polyurethane (37).

The invention discloses a method for separating and purifying hydrogen from ethylbenzene dehydrogenation tail gas by using an MOF (Metal Organic Framework) membrane separation device, which belongs to the technical field of advanced membrane separation, adopts a zeolite membrane, a polymeric membrane, a carbon membrane and an MOF membrane as membrane materials, can realize high purification of hydrogen in the tail gas, and comprises the following steps: pretreating the ethylbenzene dehydrogenation tail gas in a pretreatment unit; the pretreated raw materials are fed into MOF membrane separation equipment through a flow controller or a pump to be separated, a permeation component hydrogen is extracted from a permeation side by using a pump or N2 purging or differential pressure pushing, and a retentate side is connected with a back pressure valve to extract other impurity components of a retentate component. According to the method, efficient purification and recovery of hydrogen from ethylbenzene dehydrogenation tail gas are realized, the hydrogen production capacity can be remarkably increased, and the economic benefit is improved.

A method of more stably synthesizing methanol from a gas containing carbon dioxide and sulfur compounds, such as blast furnace gas. The method includes: a water addition process of adding water to a feed gas G01; a hydrolysis process of hydrolyzing carbonyl sulfide contained in obtained hydrated feed gas into hydrogen sulfide and carbon dioxide; a water-gas shift reaction process of converting carbon monoxide and water contained in obtained hydrolyzed gas into carbon dioxide and hydrogen; a carbon dioxide gas separation process of separating obtained shift reaction gas into carbon dioxide gas and gases of components other than carbon dioxide; a desulfurization process of removing at least hydrogen sulfide from hydrogen sulfide and carbonyl sulfide contained in the carbon dioxide gas to obtain a high-concentration carbon dioxide gas; a hydrogenation process of adding hydrogen gas to the high-concentration carbon dioxide gas; and a methanol synthesis process of reacting carbon dioxide and hydrogen contained in obtained methanol feed gas.

In a fuel cell system with a HT-PEM fuel cell (2), hydrogen is separated from the anode exhaust gas and recycled into the anode (10A) of the fuel cell (10) in order to increase efficiency. Separation of H2 gas from the anode exhaust gas leaves an option for collecting the remaining CO2 after condensing the water, with the additional aspect of using the dried remaining CO2-free anode exhaust gas for recirculation into the reformer (7) and / or the reformer heater (6). The latter is motivated by the fact that the electrochemical H2 separator (12) is only used for separating less than 90% of the H2 available H2 in the anode exhaust gas, which prolongs the lifetime of the H2 separator (12).

Systems and methods for production of gaseous products utilizing reaction vessels that integrate catalytic reaction and sorbent -based separation processes. The systems and methods may include introducing a reactant gas within a vessel containing a catalyst and sorbent, whereby the catalyst facilitates conversion of the reactant gas into a product species and the product species is selectively sorbed by the sorbent; withdrawing a first effluent stream from the vessel; and withdrawing a second effluent stream from the vessel that is enriched in the product species relative to the first effluent stream. The systems and methods may additionally be implemented using multiple reaction vessels operating in coordinated cycles to allow for continuous production and may be used in some variations for ammonia production where nitrogen and hydrogen reactants are converted to ammonia.

A process for converting carbon dioxide to syngas comprising the steps of introducing a feed gas comprising carbon dioxide, a carbon source, and a catalyst into a reactor, operating said reactor at a temperature of up to 900°C and at a pressure of up to 500 kPa to convert the feed gas and carbon source into a product comprising carbon monoxide and hydrogen, wherein the reactor is heated using a microwave source.

A method and system for integrating a steam cracking unit with a blue hydrogen unit wherein a methane-rich gas stream, a hydrogen-rich gas stream, or both from the steam cracking unit is fed to the blue hydrogen unit and a high purity hydrogen stream from the blue hydrogen unit is directed to the steam cracking unit.

The present application pertains to a method of making carbon disulfide. The method comprises reacting methane and sulfur under conditions sufficient to produce carbon disulfide, hydrogen disulfide, and heat. At least a portion of the produced hydrogen disulfide is reacted with methane under conditions sufficient to produce a mixture comprising carbon disulfide and hydrogen. Advantageously, at least a portion of the heat from reacting methane and sulfur is employed in the reacting of at least a portion of the produced hydrogen disulfide with methane.

An integrated energy system comprising a power plant configured to generate steam. The power plant may comprise a nuclear reactor and / or an electricity generation system. A chemical product generation system may comprise a first reaction chamber that receives sodium formate (HCOONa), which decomposes into sodium oxalate ((COO)2Na2) and hydrogen (H2), via the insertion of a first portion of steam at a first temperature, wherein the steam may comprise a first reaction chamber containing superheated steam. A chemical product generation system may comprise a second reaction chamber that receives sodium oxalate ((COO)2Na2), which decomposes into sodium oxide (Na2O), carbon monoxide (CO), and carbon dioxide (CO2), via the insertion of a second portion of steam at a second temperature. A syngas generation system may be operably connected to the chemical product generation system and configured to generate a combination of hydrogen (H2), carbon monoxide (CO), and / or carbon dioxide (CO2), and / or syngas.

The utility model relates to the technical field of hydrogen purification equipment, in particular to a deep adsorption hydrogen purification device. According to the technical scheme, the device comprises a supporting base and pressure swing adsorption equipment installed on the supporting base, the device comprises a main shaft rotationally installed in the pressure swing adsorption equipment and a plurality of impurity removal assemblies annularly arrayed with the main shaft as the axis, and each impurity removal assembly is formed by vertically overlapping a first filling frame and a second filling frame. According to the utility model, the traditional adsorption layers which are arranged up and down in multiple layers are designed into the horizontal annular array arrangement, so that gas can be in balanced contact with the adsorbents on the impurity removal components during vertical movement, and the balanced adsorption of the adsorbents at all positions is ensured; the impurity removal assembly is designed to be formed by vertically overlapping the first filling frame and the second filling frame, and the adsorbent can be gradually filled along with overlapping, so that the adsorbent can be uniformly paved in the impurity removal assembly as far as possible through the filling mode, and the problem that the adsorption efficiency is reduced due to accumulation and interval of the adsorbent is avoided.