122results about "Hydrogen separation using solid contact" patented technology

To provide a metal film capable of satisfactorily permeating hydrogen even when the pressure of a raw material gas is high and to provide a hydrogen permeation device using the metal film and a hydrogen production method.SOLUTION: In a metal film: a hydrogen-containing raw material gas is in contact at a pressure of 30 kPa or higher and hydrogen is permeated; a fifth group element is included; and an average crystal particle diameter is 1 mm or less and a thickness is 0.05 mm or more when the surface of the fifth group element is observed and measured by a combination of an electron field emission type scanning electron microscope and an electron backscatter diffraction.SELECTED DRAWING: Figure 4

The present application relates to a process for producing synthetic ammonia by using hydrogen-containing tail gas, comprising the following steps: S1: sodium cyanide tail gas is pressurized, then heated and water-cooled. S2: the impurity-removed tail gas is desulfurized. S3: the desulfurized tail gas is mixed with chlor-alkali tail gas, the mixed gas is heated and deoxidized. S4: the deoxidized tail gas is pressurized and enters a PSA (pressure swing adsorption) device for pressure swing adsorption treatment, obtaining high-purity hydrogen. In the PSA device, dehydrating, carbon dioxide, methane, carbon monoxide and nitrogen adsorbents are sequentially arranged. The carbon dioxide adsorbent is activated carbon modified by carbonate and strong alkali, and the nitrogen adsorbent is 13X zeolite molecular sieve modified by Na + and Ba 2+ and Ca 2+ ion exchange. S5: nitrogen reacts with the high-purity hydrogen obtained in step S4 to generate ammonia. The present application can improve the adsorption capacity of the adsorbent for impurity gas, thereby reducing the replacement frequency of the adsorbent, prolonging the service period and service life of the adsorbent, and improving the production efficiency.

A chemical method and chemical system that pyrolyzes a hydrocarbon feedstock (e.g., methane or natural gas) using a pyrolysis reactor to produce treated hydrogen gas at high gas temperatures. The pyrolysis reactor flows a high temperature fluid stream of pyrolysis products, including hydrogen gas and solid carbon products, to a heat exchanger to cool it into a low temperature fluid stream of pyrolysis products. A treatment system connected to the heat exchanger receives the low temperature fluid stream and generates treated hydrogen gas at low gas temperatures, which is then flowed back to the heat exchanger as a gas stream at low gas temperatures to be used as a working fluid to cool the high temperature fluid stream of pyrolysis gas. Advantageously, this exchange heats the gas stream at low gas temperatures, producing the treated hydrogen gas at high gas temperatures.

An adsorptive separation method is disclosed. The adsorptive separation method of the present invention is a method for adsorptively separating a first gas from a mixed gas using a plurality of adsorption beds provided with an adsorbent selectively adsorbing the first gas, characterized by comprising an adsorption step, a depressurization step, a first rinse step, a second rinse step, a depressurization desorption step, a purge step, a pressurization step, a pressure increasing equalization and step, a repressurization step. According to the present invention, in the second rinse step, a high-purity first gas is introduced into the adsorption bed at a first pressure, and in the depressurization desorption step, the first gas is compressed to the first pressure by a compressor in a process of being transferred to a high-pressure product vessel, thereby making it possible to provide an adsorptive separation method configured to reduce power consumption by pressurizing a product gas of atmospheric pressure or higher discharged in a blowdown step to a pressure at which a rinse is performed, and to reduce power consumption used to create a recirculation stream used for the rinse.

This invention relates to the field of hydrogen purification technology, specifically to a hydrogen purification device, a hydrogen production system, and a method of use. A hydrogen purification device includes: an adsorption assembly comprising a first adsorption tower and a second adsorption tower, the first and second adsorption towers being adapted to dehydrate and dry incoming hydrogen gas; and a pipeline assembly comprising a main inlet pipe, a first inlet branch pipe, and a second inlet branch pipe, the main inlet pipe being adapted to allow the flow of hydrogen gas to be dried, one end of the first inlet branch pipe being connected to the main inlet pipe and the other end being connected to the first adsorption tower, and one end of the second inlet branch pipe being connected to the main inlet pipe and the other end being connected to the second adsorption tower. This invention provides a hydrogen purification device, a hydrogen production system, and a method of use to solve the problems of existing hydrogen purification devices, where the drying unit mostly adopts a TSA three-tower process, which involves cumbersome pipeline layout, complex program control, and high cost.

A method for synthesizing methanol and a synthesis gas flow include supplying hydrogen and carbon oxides to a methanol reactor assembly. A residual gas flow with unreacted hydrogen and unreacted carbon oxides is obtained from the methanol reactor assembly, and the residual gas flow is supplied to a hydrogen separation assembly to obtain a hydrogen-containing flow, which is supplied to the methanol reactor assembly and has a higher molar proportion of hydrogen than the residual gas flow. A purge gas flow having methane is obtained from the hydrogen separation assembly. The purge gas flow is supplied to a recovery assembly for recovering a recovery flow having carbon dioxide and hydrogen, the recovery assembly has a recovery reactor for partly converting the methane of the purge gas flow into carbon oxides and hydrogen using a partial thermal oxidation, and the recovery flow is supplied to the methanol reactor assembly.

ELECTROLYTIC HYDROGEN PURIFICATION The present invention relates to a method for purifying a hydrogen stream contaminated by water, oxygen, and optionally nitrogen. The method comprises contacting the hydrogen stream to be purified with a zeolitic adsorbent material comprising at least one metal selected from the metals of columns 3 to 12 of the Periodic Table of Elements, in its zero-valence metallic form, or in its oxidized or reduced form, and recovering the purified hydrogen stream. The invention also relates to the use of a zeolitic adsorbent material comprising at least one metal from columns 3 to 12 of the Periodic Table of Elements for hydrogen purification, as well as the use of hydrogen thus purified in industrial processes. Fig.: None

The utility model discloses a kind of cyclic treatment systems of silane gas decomposition tail gas in polysilicon production, including at least one group by adsorption tower and analysis tower composition pressure swing adsorption device, the gas inlet end of pressure swing adsorption device is equipped with tail gas compressor, tail gas compressor connects the tail gas outlet of silane gas decomposition device, the product gas outlet end of pressure swing adsorption device is equipped with adsorption product gas tank, adsorption product gas tank is connected to silane gas decomposition device by circulating hydrogen pipe, the pressure relief end of pressure swing adsorption device is connected to cold hydrogenation device.The utility model utilizes the principle of pressure swing adsorption to separate and impurity removal hydrogen in silane gas decomposition tail gas, obtained product hydrogen and pressure relief gas can be used as circulating hydrogen and cold hydrogenation device respectively, without material waste, the setting of tail gas compressor and adsorption product gas tank can guarantee the stability of system control and circulating hydrogen recovery.

This dehumidification apparatus is for dehumidifying a hydrogen gas that is produced by a hydrogen production device, the dehumidification apparatus comprising: a dehumidifier that includes an adsorption tower, inside of which there is provided an adsorbent that is capable of adsorbing moisture contained in the hydrogen gas; an inlet line for introducing the hydrogen gas from the hydrogen production device into the dehumidifier; an inlet valve that is provided to the inlet line; an outlet line for discharging the hydrogen gas that is dehumidified by the dehumidifier out from the dehumidifier; an outlet valve that is provided to the outlet line; and a control device that is configured to adjust the opening degree of the inlet valve and the opening degree of the outlet valve on the basis of the pressure within the adsorption tower during activation of the dehumidification apparatus.

This utility model discloses a staged purification device for electrolytic hydrogen production, including a purification tank. The purification tank contains a first cylinder and a second cylinder. Several dehydration units are arranged sequentially from bottom to top within the internal region of the first cylinder. A catalytic deoxygenation unit is arranged between two adjacent dehydration units in the region between the first and second cylinders. A heating device is arranged in the region between the second cylinder and the purification tank. An air inlet is located at the bottom of the purification tank. Several first connecting ports and several second connecting ports are provided on the wall of the first cylinder. The first connecting ports connect the catalytic deoxygenation unit to the dehydration unit below it, and the second connecting ports connect the catalytic deoxygenation unit to the dehydration unit above it. A dual-outlet air pipe is located at the top of the purification tank. This utility model can perform multi-stage continuous deoxygenation and dehydration treatment on hydrogen, effectively removing oxygen and water vapor mixed in with the hydrogen, thereby ensuring the purity of the final output hydrogen.

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

Hydrogen purification devices and components thereof are disclosed. In some embodiments, a device includes a permeation frame that can include a perimeter portion and a membrane support portion surrounded by the perimeter portion. The membrane support portion can include opposing first and second surfaces, each of the first and second surfaces having a plurality of grooves. The membrane support portion can contact and support at least one hydrogen-selective membrane. The membrane support portion can be integrally formed with the perimeter portion. The permeation frame can also include one or more output apertures in at least one of the perimeter portion and the membrane support portion. The permeation frame can also include at least one input aperture in the perimeter portion. The at least one input aperture can be distinct and spaced apart from the one or more output apertures.

The application provides an ethylene device cracking gas separation system and a separation method. The separation system comprises a multistage cryogenic unit, a first separation tank, a heat exchanger, a first membrane separation unit, a first compressor, a second membrane separation unit, a second compressor, a multistage series separation tank, a third membrane separation unit and a cryogenic demethanizer. The application separates most of the hydrogen in the ethylene device cracking gas through the multistage membrane separation unit, thereby increasing the partial pressure of ethylene in the condensation process, and further reducing the refrigeration load in the ultra-low temperature zone.

The application discloses a kind of high flash gas multi-element recycling device and method, belong to synthetic ammonia acid gas processing technical field, including hydrogen extraction system, high flash gas sulfur recovery system and high flash gas recovery ammonia system, high flash gas recovery ammonia system is communicated with high flash gas sulfur recovery system, hydrogen extraction system is connected with high flash gas recovery ammonia system.The application uses the above-mentioned one kind of high flash gas multi-element recycling device and method, by the desorption gas compressor of PSA hydrogen extraction device, gasification high flash gas is recovered to shift system, greatly improve the utilization value of high flash gas;By sending part of high flash gas into sulfur recovery device, the natural gas consumption of incinerator can be reduced, and the sulfuric acid production and byproduct steam production are increased;By setting raw material gas heat exchanger, part of purified gas is led to PSA hydrogen extraction device to prepare high-purity hydrogen.

A purified gas production system includes a molten carbonate fuel cell configured to output an anode exhaust stream including hydrogen and carbon dioxide, a gas separation system configured to receive the anode exhaust stream and to output a purified gas stream including one of purified hydrogen or purified carbon dioxide, a gas purity analyzer configured to detect concentrations of a plurality of contaminants in the purified gas stream using Fourier Transform Infrared Spectroscopy, a valve assembly configured to selectively direct the purified gas stream toward one of a first flow path or a second flow path, and a controller communicably coupled to the gas purity analyzer and the valve assembly and configured to control the valve assembly based on the detected concentrations of the plurality of contaminants.

This utility model relates to the field of coal chemical technology, and more particularly to a highly stable dual isothermal converter system. The system comprises a mixed gas pipeline of water gas and steam connected to the mixed gas inlet of a medium-temperature heat exchanger. The mixed gas outlet of the medium-temperature heat exchanger is connected to the upper inlets of primary isothermal converter A and primary isothermal converter B, respectively. The lower outlets of primary isothermal converter A and primary isothermal converter B are connected to the converter gas inlet of the medium-temperature heat exchanger. The converter gas outlet of the medium-temperature heat exchanger is connected to the converter gas inlet of a quencher. The converter gas outlet of the quencher is connected to the converter gas inlet at the upper end of a secondary isothermal converter. The converter gas outlet at the lower end of the secondary isothermal converter is connected to the converter gas output pipeline. This utility model ensures stable shutdown and maintenance of the isothermal converters by setting up two primary isothermal converters, adding double shut-off valves and blind flanges.

The application provides a method and device for hydrogen production by electromagnetic induction high-temperature carbonization, and belongs to the technical field of hydrogen production by carbonization. The method comprises the following steps: S1, drying and preheating solid carbon-containing raw materials, and isolating air throughout the process; S2, starting a ceramic screw propeller in the carbonization furnace to continuously push the raw materials and sequentially pass through a preheating section, a medium-temperature dry distillation section and a high-temperature carbonization section for pyrolysis carbonization reaction, and simultaneously generate solid carbonized substances and hydrogen-containing mixed gas; S3, the solid carbonized substances are discharged after being transported to a cooling section for cooling; the hydrogen-containing mixed gas is discharged from a gas outlet and subjected to dust removal and purification treatment; and S4, the purified hydrogen-containing mixed gas is purified to obtain high-purity hydrogen. The hydrogen production process of the application does not use open flame heating, reduces dust and waste gas emission, is more environmentally friendly, can prepare high-purity hydrogen, and further improves the product value.

The application discloses a wind-solar complementary self-adaptive water electrolysis hydrogen production system, which comprises an integrated wind-solar power generation unit, an electric energy regulating module, a water electrolysis hydrogen production module, a self-adaptive optimal distribution and control unit, an energy storage module and a hydrogen treatment module; the integrated wind-solar power generation unit combines a wind power generation unit and a photovoltaic power generation unit, and uniformly transmits the electric energy converted from wind energy and solar energy to the electric energy regulating module; the electric energy regulating module provides a power supply for the water electrolysis hydrogen production module after rectifying and stabilizing the input electric energy; the self-adaptive optimal distribution and control unit collects operation parameters of each module in real time, combines wind-solar power prediction and an electrolysis efficiency model, implements a dynamic power distribution and a multi-target optimization control strategy, and dynamically adjusts electric energy configuration, electrolysis tank operation parameters and charging and discharging states of the energy storage module; and the hydrogen treatment module purifies, dries and stores hydrogen generated through electrolysis.

The utility model discloses an industrial by -product hydrogen purification system relates to hydrogen purification technical field. After the active carbon adsorption unit processing of the utility model, again through the adsorption of three TSA adsorption towers in TSA adsorption unit, the hydrogen purity after purification is equal to or greater than 99.999%, and the process does not need to consume the chemical reagent that can produce a large amount of waste liquid, and the process is simple.

A system for processing coke oven gas (COG), in particular coke oven gas produced by a steel plant, the system being configured to receive a coke oven gas stream. The innovative system comprises a compression unit (100) configured to receive the coke oven gas stream, compress the coke oven gas stream and discharge a compressed coke oven gas stream; a separation unit (200) configured to receive the compressed coke oven gas stream, perform a hydrogen (=H2) separation and discharge a hydrogen stream and a gas stream comprising methane (=CH4) and other unreacted components of the coke oven gas stream; a pyrolysis unit (300) configured to receive the gas stream comprising methane and other unreacted components of the coke oven gas stream and perform a pyrolysis of the stream comprising methane and other unreacted components of the coke oven gas stream to discharge a solid carbon (=C) and a gas stream comprising hydrogen and other unreacted components of the coke oven gas stream.

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

The application discloses a kind of methanol reforming and hydrogen adsorption integrated multi-field coupling reactor and the continuous hydrogen production system and hydrogen production method with it.The reactor of the application couples reforming reaction cavity, adsorption cavity, desorption cavity, and designs the inner and outer two layers of adsorbent bed layer, and the inner layer adsorption cavity is adsorbed hydrogen-rich, and the outer layer desorption cavity is responsible for desorption regeneration, hydrogen molecules pass through adsorbent lattice and diffuse from inner layer to outer layer in situ under the driving of concentration gradient, this structure allows adsorption and desorption process to be separated in space but closely coupled, without interrupting reforming reaction, to realize the dynamic cycle of adsorbent adsorption-migration-desorption, lay the foundation for continuous operation, through innovative structure and material matching, realize the efficient coupling of methanol reforming and hydrogen selective adsorption in the uniform temperature zone of reforming reaction temperature.

[Problem] To provide a practical and novel alcohol and derivatives thereof which have more industrial value than existing petrochemical raw materials. [Solution] Ethanol comprising an inorganic component and / or an organic component, wherein the inorganic component comprises at least one component selected from the group consisting of: silicon having a content of 10 mg / L or more and 100 mg / L or less; chromium having a content of 0.6 mg / L or less; iron having a content of 2.0 mg / L or less ; sodium having a content of 150 mg / L or more and 1000 mg / L or less; and potassium having a content of 1.0mg / L or more and 10 mg / L or less; and the organic component comprises at least one component selected from the group consisting of: aliphatic hydrocarbon having a content of 0.16 mg / L or more and 10 mg / L or less; aromatic hydrocarbon having a content of 0.4 mg / L or more and 10 mg / L or less; and dialkyl ether having a content of 0.1 mg / L or more and 100 mg / L or less.

A kind of zero-emission carbon dioxide capture-hydrogen purification refining tail gas integrated processing system and its use method belong to refining tail gas technical field.Solve the problem of large fuel consumption, waste gas pollution emission in prior art.Technical points: refining tail gas enters TSA pretreatment tower and is removed, remaining gas enters PSA hydrogen purification tower and is removed, high-purity hydrogen is injected into town hydrogen pipe network, hydrogen purge gas flows into heat exchanger through shunt pipeline and is injected into PSA hydrogen purification tower, regeneration gas of PSA hydrogen purification tower is injected into TSA pretreatment tower after heating by combustion heater, regeneration gas of TSA pretreatment tower enters combustion heater after heat exchange;The combustion tail gas generated enters VSA separation tower, obtains N2 and CO2.The present application realizes H2 purification and CO2 capture by "adsorption-regeneration gas combustion and heat recovery-heat cascade utilization", obtains high-purity product, achieves resource recovery and harmful gas zero emission.

Provided is a method for reusing an adsorbent which can stably exhibit purification ability by regenerating a used absorbent, in order to keep the composition of a purified syngas constant. The present invention concerns a method for regenerating a zeolite adsorbent which adsorbs a carbon dioxide gas from a syngas comprising the carbon dioxide gas and reduces the concentration of the carbon dioxide gas in the syngas, comprising: a step of recovering a used zeolite adsorbent; a step of calcining the used zeolite adsorbent at a temperature of 300 °C to 600 °C in an oxygen atmosphere to produce a regenerated zeolite adsorbent; and a step of reusing the regenerated zeolite adsorbent.

Processes for hydrogenating toluene to methylcyclohexane (MCH) and dehydrogenating MCH to toluene with minimal to no by-products, thereby ensuring minimal loss of hydrogen are described. MCH acts as a liquid organic hydrogen carrier, and it can be transferred in storage vessels and / or pipelines for several thousands of miles to the final destination with very minimal to no degradation.

A process and system to integrate a steam cracking unit with a blue ammonia unit such that a methane-rich gas stream and / or a hydrogen-rich gas stream is directed from the steam cracking unit to the blue ammonia unit while a hydrogen gas containing stream is directed from the blue ammonia unit to the steam cracking unit.