707results about "Hydrogen separation using solid contact" patented technology

The invention relates to the technical field of gas separation and purification, in particular to a method and system for recycling hydrogen in mixed gas through pressure swing adsorption. The method comprises the following steps: performing multi-layer adsorption impurity removal on mixed gas containing 20-25% of silane, 10-15% of disilane and 60-70% of hydrogen, and cooling to 22-28 DEG C; the mixed gas subjected to primary impurity removal enters a pressure swing adsorption device, and an adsorbent in the adsorption device is modified activated carbon. The system comprises a mixed gas cylinder, a pretreatment unit, a pressure swing adsorption unit and a hydrogen collection unit which are connected in sequence. By adopting the pressure swing adsorption method, the hydrogen recovery rate is remarkably increased and can reach 93%, the purity can reach 99.2% or above, and the strict requirement of high-end industrial production for high-purity hydrogen can be met.

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

The invention belongs to the technical field of petroleum refining, and relates to a high-purity hydrogen recovery process for improving denitrification efficiency based on a PSA (Pressure Swing Adsorption) device, which comprises the following steps: carrying out primary adsorption impurity removal after pretreatment and pressure regulation on raw material gas, carrying out gas-liquid separation, pretreatment and pressure regulation on the obtained hydrogen-rich gas, and then carrying out membrane separation; the generated hydrogen-rich permeated gas is subjected to pressure regulation and then is sequentially input into a second-stage PSA device and a third-stage PSA device for further adsorption and purification, and finally finished hydrogen with the purity not lower than 99.9% is obtained. The membrane separation technology is adopted for selective separation of hydrogen and nitrogen, the membrane separation unit is arranged at the outlet of the first-stage PSA device, nitrogen is removed from the source, meanwhile, desorbed gas of the third-stage PSA device and retention gas of the membrane separation unit are combined for combustion, nitrogen accumulation in the system is avoided, the nitrogen circulation amount in the system is reduced, and the energy consumption of the system is reduced. The hydrogen recovery rate can be effectively improved while the adsorption efficiency is improved, the process is simple, the investment cost is low, the implementation period is short, and remarkable economic benefits and process advantages are achieved.

The invention discloses a self-cleaning type hydrogen purification adsorption tower, and belongs to the technical field of self-cleaning type hydrogen purification adsorption towers, the self-cleaning type hydrogen purification adsorption tower comprises a vertically arranged tower body, a gas inlet pipe is mounted at the lower part of the tower body, a gas outlet pipe is mounted at the upper part of the tower body, and a fixed seat is fixedly mounted on the inner wall of the upper part of the tower body; a lifting plate is installed on the inner side of the fixing base in a lifting mode, a rotating base is elastically and rotationally installed on the inner wall of the upper portion of the tower body, an elastic rubber part is fixedly connected between the lifting plate and the rotating base, a flushing air pipe is fixedly installed on the upper portion of the tower body, and a motor is fixedly installed on the top of the tower body; and an adjusting assembly for controlling the lifting plate to lift is connected between the motor and the lifting plate. The self-cleaning hydrogen purification adsorption tower can further perform auxiliary pressurization in the adsorption process so as to improve the adsorption effect, and can realize efficient backflushing and cleaning after the adsorption is completed, so that the regeneration adsorption effect of an adsorbent is ensured.

The invention provides a garbage pyrolysis gasification multi-stage directional regulation-gas-solid phase reforming synergistic hydrogen production treatment process which comprises the following steps: first-stage regulation: pretreatment and graded feeding: crushing, sorting, drying and catalytic coating treatment are performed on garbage through a physical-chemical directional means; second-stage regulation and control: performing low-temperature pyrolysis directional dechlorination, and performing thermochemical directional conversion on plastic and biomass garbage at 350-450 DEG C; third-stage regulation and control: gasifying and melting are coordinated and oriented, and a gas-solid phase coupling reaction is realized in double fluidized beds at 800-900 DEG C; four-stage regulation and control: multi-stage gas-solid phase reforming is carried out, and the hydrogen yield is increased through catalysis-adsorption synergistic effect in a 700 DEG C moving bed; and five-stage regulation and control: deep purification and hydrogen purification, wherein the synthesis gas is selectively oxidized by utilizing chemical looping combustion to release hydrogen with the purity being greater than or equal to 99.99%. According to the invention, the molten ash is used as a catalytic carrier, and the Fe-Ce active sites of the molten ash are utilized to synchronously realize tar cracking and synthesis gas reforming, so that the conversion rate of tar is effectively improved.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

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

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

The invention relates to the technical field of carbon sequestration and hydrogen production, and discloses a carbon sequestration and hydrogen production method and a carbon sequestration and hydrogen production device combined with new energy surplus electric power, and the carbon sequestration and hydrogen production method combined with new energy surplus electric power comprises the following steps: regulating and controlling the temperature and pressure of a geological reaction ore bed; carrying out degassing treatment on the water to obtain degassed water; injecting a mixed solution of carbon dioxide and the degassed water into the geological reaction ore bed; carrying out carbon dioxide mineralization storage and hydrogen production reaction to obtain carbonate minerals and hydrogen; purifying the hydrogen to obtain purified hydrogen; the new energy surplus electric power is used for providing driving force for the carbon sequestration hydrogen production method. The carbon sequestration and hydrogen production method is high in reaction efficiency and reaction rate, not only assists carbon dioxide emission reduction, but also can obtain high-purity hydrogen, can also consume new energy surplus electric power, and has both environmental protection and resource utilization values.

The invention relates to the technical field of gas adsorption materials, in particular to special silica gel for pressure swing adsorption hydrogen extraction and a preparation method thereof. The special silica gel for pressure swing adsorption hydrogen extraction comprises pretreated adsorption silica gel and advanced treatment adsorption silica gel, wherein the pretreated silica gel is specially used for capturing polar molecules; and the silica gel is deeply treated to accurately adsorb small-molecule gas. During preparation, a graded functionalization strategy is adopted, the stability of a silica gel framework is enhanced through acid activation, a multi-stage adsorption interface is constructed through amino / fluorocarbon directional grafting, and active components are fixed through chemical bonding to avoid loss. During application, a double-tower pressure swing adsorption process is adopted, the pretreatment adsorption tower preferentially removes strong adsorbate, the deep treatment adsorption tower improves hydrogen purity through hydrophobic screening, and gradient pressure reduction and pulse nitrogen desorption technologies are matched, so that efficient regeneration of the adsorbent is realized. A single material system breaks through a mass transfer barrier of a traditional multi-adsorbent combination, has the characteristics of high-selectivity adsorption and low-energy-consumption desorption, and is suitable for efficient recovery of hydrogen resources in synthesis ammonia tail gas.

The invention provides an offshore floating type platform PEM hydrogen production gas-liquid separation device which comprises a separator, a first outlet pipe is arranged at the top of the separator, a second outlet pipe is arranged at the bottom of the separator, and an inlet pipe is arranged on one side of the separator; the first separation part is obliquely arranged in the separator, and a plurality of first mesh holes are formed in the first separation part; the second separation part is arranged in the radial direction of the separator and located above the first separation part, and second mesh holes are formed in the second separation part; the separator has a large length-diameter ratio, the first separation piece and the second separation piece are matched with the separator with the large length-diameter ratio, the fluctuation area of the liquid level during shaking is reduced, the stability of the separation efficiency is further guaranteed, it is guaranteed that oxygen can be safely discharged, and the problem that liquid enters an oxygen pipeline to damage an instrument is solved.

The invention belongs to the field of hydrogen energy, and discloses a hydrogen recovery system and method for a hydrogenation mother station. The system comprises a hydrogen purification device, a product gas and recovery gas compressor, and an integrated pipeline network connecting feed gas, product gas, desorbed gas and a long pipe vehicle. According to the system, through a plurality of recovery paths, hydrogen which is not qualified in purification, desorbed gas and hydrogen replaced in the long pipe vehicle can be recovered to a fuel gas pipe network, a raw material gas inlet or a desorbed gas system respectively, and high-purity hydrogen can be used for carrying out online regeneration on a penetrating adsorbent. According to the invention, comprehensive recovery of the vented combustible gas in the hydrogenation mother station is realized, the hydrogen recovery rate is obviously improved, and the product gas quality and supply stability are ensured.

The invention relates to a method and a system for recovering hydrogen in mixed gas by using a pressure swing adsorption and membrane separation method. The method comprises the following steps: S1, preliminary impurity removal: carrying out multi-layer adsorption impurity removal on mixed gas containing silane, disilane and hydrogen, and cooling to 22-28 DEG C; s2, pressure swing adsorption: feeding the mixed gas subjected to primary impurity removal into a pressure swing adsorption device, wherein an adsorbent in the adsorption device is modified activated carbon which is activated at high temperature and is loaded with 3-5% of copper oxide on the surface; s3, membrane separation and adsorption: the mixed gas passing through the pressure swing adsorption device enters a filter and a dryer, and finally passes through a membrane separation device, silane and disilane are collected on the enrichment side of the membrane separation device for further purification, and hydrogen is collected on the permeation side of the membrane separation device for further purification. According to the invention, a process of combining pressure swing adsorption and a membrane separation method is adopted, the advantages of the two technologies are fully exerted, and efficient separation of silane, disilane and hydrogen is realized.

The invention provides hydrogen production and storage energy equipment and system, and belongs to the technical field of hydrogen energy storage, the hydrogen production and storage energy equipment comprises a cabinet body, the upper end face of the cabinet body is provided with a taking and placing opening used for taking and placing a hydrogen storage device; the hydrogen storage device is mounted at the upper part of the cabinet body; the fuel cell power generation device is pre-mounted below the hydrogen storage device; the water storage tank, the hydrogen production device, the gas-water separation device and the energy management device are fixedly arranged at the bottom of the cabinet body. The hydrogen production and storage energy equipment provided by the invention simultaneously has three functions of hydrogen production, hydrogen utilization and power generation, can conveniently convert solar energy and water into green hydrogen energy and electric energy, and has the advantages of safety in use, miniaturization in structure, convenience in use and maintenance, moderate cost and the like.

A fixed adsorbent and catalyst bed containing system includes two or more first reactors in a reaction (RM) mode and two or more second reactors in a regeneration (RGM) mode that are sequentially operable and positioned in parallel. The two or more first reactors in the RM mode are configured to simultaneously in-situ decompose NH3 by a catalyst and selectively adsorb N2 by an adsorbent. At a substantially same time, the two or more second reactors in the RGM mode are configured to continuously regenerate the catalyst after decomposing the NH3 and the adsorbent after adsorbing the N2. A moving adsorbent bed and fixed catalyst bed containing system and a dual fluidized bed containing system are also provided. The present invention also relates to methods for decomposing ammonia (NH3) to nitrogen (N2) and hydrogen (H2).

The invention relates to the field of impurity separation, and discloses a method for separating impurities in a liquid phase and application, the method comprises the following steps: (1) contacting a liquid-phase raw material with an adsorbent for adsorption to obtain a liquid-phase material flow; the liquid-phase raw material comprises an organic liquid hydrogen storage substance and impurities; the adsorbent preferentially adsorbs impurities in the liquid-phase raw material; (2) carrying out back-flushing desorption on the adsorbent by using part of the liquid-phase material flow to obtain a desorption solution; based on the total mass of the desorption solution, the impurity content in the desorption solution is 2-5%; (3) feeding the desorption liquid into a rectifying tower, carrying out rectification separation, and outputting the obtained tower bottom distillate and the residual part of liquid phase material flow as products; and (4) regenerating the adsorbent after backwashing desorption. The method has the characteristics of high purity of the organic liquid hydrogen storage substance, low cost and no introduction of new impurities.

The present application belongs to the field of hydrogen purification, and particularly relates to a temperature control type hydrogen purification system and a purification regeneration method. The system comprises a water tank, a refrigerator unit and an electric heater, at least one adsorption tower, a circulating water pump, a purge gas buffer tank, a purge pipeline and a control unit. The adsorption tower is of a jacket structure, and a coil pipe is arranged in the jacket. The inlet and outlet of the coil pipe are connected with the water tank to form a circulating water loop, so that the temperature in the adsorption tower is kept at 20-30 DEG C. The purge gas buffer tank is used for receiving and temporarily storing hydrogen obtained in the step of pressure reduction after normal discharge. The control unit is used for adjusting the pressure in the water tank to change the saturated vapor pressure of water, so that heat supply is realized in the same water body in the daily constant temperature adsorption and the regeneration stage. In the regeneration stage, the program control is adopted, which comprises constant temperature at a constant speed, constant temperature at a constant speed and constant temperature at a constant speed. In the normal production, the present application keeps the optimum adsorption temperature in the adsorption process, and when the adsorption tower needs to be regenerated, online regeneration is realized to avoid loss caused by discharge and reduce the production cost.

The invention relates to an energy optimization system for natural gas hydrogen production, compressed air energy storage and air direct carbon capture coupling, which comprises a natural gas steam reforming system, an outlet of a water supply preheater is connected with an inlet of a steam generator, and an outlet of the steam generator is connected with an inlet of a reaction gas preheater; an outlet of the reaction gas preheater is connected with an inlet of the reforming reactor, an outlet of the reforming reactor is connected with an inlet of the water vapor generator, and an outlet of the water supply preheater is connected with an inlet of the hydrogen pressure swing adsorption bed; according to the flue gas carbon capture system, an inlet of a flue gas cooler is connected with an outlet of a water vapor generator, and an outlet of the flue gas cooler is connected with an inlet of a flue gas carbon dioxide separation device; according to the compressed air energy storage and air direct carbon capture coupling system, an outlet of a compressed air cooler is connected with an inlet of a carbon dioxide pressure swing adsorption device, and an outlet of the compressed air cooler is connected with an inlet of a reaction gas preheater.

The application discloses a hydrogen purification device based on a hydrogen refueling station, which comprises a bottom plate, and a top plate arranged above the bottom plate. By opening the air inlet valve, hydrogen enters the inside of the gas storage cylinder from the air inlet pipe, and the hydrogen fills the gas storage cylinder. According to the second opening and closing mechanism, the air inlet end of one group of adsorption cylinders is arbitrarily selected to be opened, and the hydrogen rapidly enters the inside of the group of adsorption cylinders through the compression mechanism, and then the air inlet end of the group of adsorption cylinders is immediately closed. Next, the hydrogen is purified by the adsorption mechanism, the quality of the hydrogen is improved, and the hydrogen in the group of adsorption cylinders can be discharged through the air outlet pipe to the maximum extent. Then, the second opening and closing mechanism is continuously opened to open another group of adsorption cylinders, and the above purification operation is repeated, so that continuous hydrogen purification treatment is ensured, and the inside of the device can be cleaned after use, which is convenient and fast.

The application provides a hydrogen deep removal and moisture removal method. High-concentration raw gas is dynamically mixed with dry low-concentration reflux gas in a mixer to form mixed gas, so as to reduce the hydrogen content and reduce the reaction risk. After pressurized heating, oxygen with a precisely matched hydrogen concentration is injected into a reactor for reaction. The reactor is provided with an alternating fixed and rotatable cylinder, and the inner wall of the flow channel is coated with a catalyst; the corresponding cylinder speed is automatically adjusted based on real-time hydrogen concentration detection downstream, and the speed is accelerated when the concentration exceeds the standard to strengthen turbulent contact and prolong the reaction time, combined with the concentration threshold setting decreasing along the flow direction, so that the hydrogen is deeply removed to an ultralow level. The reaction generates moisture, most of which is separated by two-stage water cooling, and then is deeply adsorbed and dried to be completely removed to an ultralow content. Finally, the gas is divided into two parts, one part is output as product gas, and the other part is completely dried reflux gas which is recycled to the initial mixing step to reduce the reaction risk of high hydrogen content.

The utility model discloses a composite hydrogen supply system and hydrogen using equipment. The composite hydrogen supply system comprises a methanol storage device, a water storage device, a mixing device, a reaction chamber, a catalytic burner and a hydrogen storage device, the methanol storage device and the water storage device are connected to the mixing device in parallel, the mixing device is connected with the reaction chamber, the reaction chamber is used for being connected with hydrogen using equipment, and the catalytic burner is connected with the hydrogen storage device. The reaction chamber is used for carrying out reforming hydrogen production reaction or organic liquid hydrogen storage and desorption reaction, the catalytic burner is connected to the reaction chamber and used for maintaining the temperature needed by the reaction chamber, and the hydrogen storage device is used for being connected with hydrogen using equipment and used for providing hydrogen for the hydrogen using equipment in the cold start stage of the system. The water storage device is further used for being connected with hydrogen using equipment so as to collect water generated by the hydrogen using equipment. The composite hydrogen supply system provided by the utility model can solve the problem of slow cold start of methanol reforming hydrogen production in the prior art, and improves the hydrogen storage density of the whole system at the same time.

The present disclosure relates to a process for producing sponge iron from iron ore, comprising the steps of: - charging iron ore into a direct reduction shaft (211), - introducing a hydrogen-rich reducing gas (215) into the direct reduction shaft to reduce the iron ore and produce sponge iron (209), - removing a top gas (216) from the direct reduction shaft, - splitting the top gas into a recycle stream (218) and an extract stream (256), - processing the extract stream through a separation unit (257) to provide a hydrogen-rich off-stream (258) and an inerts-rich off-stream (259), - introducing the recycle stream and the hydrogen-rich off-stream into the direct reduction shaft as constituent parts of the hydrogen-rich reducing gas. The present disclosure further relates to a system for producing sponge iron.

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 utility model relates to the technical field of hydrogen production and hydrogenation, in particular to a movable hydrogen production and hydrogenation integrated system which comprises a raw material storage device, a reforming device, a condensing device, a hydrogen purification device, a compression device, a hydrogen storage device, a hydrogenation device and an electric control device. The hydrogen production and hydrogenation integrated system disclosed by the utility model can realize the purposes of high-efficiency hydrogen production and hydrogenation.

Hydrogen reforming system, comprehensive: a reformer (100) which produces a first mixed gas by means of a reforming reaction between fuel gas and water; a transformer (200) which is fed with the first mixed gas and produces a second mixed gas from which carbon monoxide is removed by means of a water-gas shift reaction; a unit (300) for pressure swing adsorption (PSA) that cleans and separates hydrogen from the second mixed gas generated in the transformer and discharges hydrogen-free exhaust gas; a heat exchanger (400) provided between the reformer and the transformer and between the transformer and the pressure swing adsorption (PSA) unit to control the temperatures of the first mixed gas and the second mixed gas by means of heat exchange with water; a water feeder (500) that communicates with the heat exchanger and supplies water to the heat exchanger and supplies the water exiting the heat exchanger to the reformer; and a control valve (600) which is provided on a line through which water is discharged from the water supply and which adjusts a flow rate of water supplied to the heat exchanger in order to control the first mixed gas and the second mixed gas separately, wherein the heat exchanger (400) comprises a first heat exchanger (410) provided between the reformer (100) and the transformer (200) in which heat exchange takes place between the first mixed gas and water; and a second heat exchanger (420) and a third heat exchanger (430) provided between the transformer (200) and the PSA unit in which heat exchange takes place between the second mixed gas and water, and wherein the water supply (500) comprises a first supply line (510) connected to and supplying water to the first heat exchanger (410), a second supply line (520) connected to and supplying water to the second heat exchanger (420), and a third supply line (530) connected to and supplying water to the third heat exchanger (430), thereby allowing the temperatures of the first mixed gas and the second mixed gas to be controlled separately, wherein the control valve (600) comprises a first control valve (610) provided on the first supply line (510) to control a flow rate of water flowing through the first supply line, and a second control valve (620) provided on the third supply line (530) to control a flow rate of water flowing through the third supply line (530), thereby separately controlling the flow rates of water flowing through the first supply line (510) and the third supply line (530).

The utility model discloses a low-calorific-value fuel gas calorific value adjusting device for stabilizing combustion of a hydrogen conversion furnace, which comprises a high-calorific-value analytic gas buffer tank and a controller, and the high-calorific-value analytic gas buffer tank is connected with a high-calorific-value analytic gas compressor through a gas pipeline. The high-calorific-value desorption gas compressor is connected with a low-calorific-value fuel gas pipeline through a high-pressure pipeline, an electric control valve controlled by a controller is arranged on the high-pressure pipeline, a gas analyzer controlled by the controller is arranged on the low-calorific-value fuel gas pipeline, and a mixing buffer tank is arranged at the tail end of the low-calorific-value fuel gas pipeline. According to the utility model, the mode that high-calorific-value analysis gas is supplied to low-calorific-value fuel gas is adopted, the low-calorific-value fuel gas pipeline is connected with the high-pressure pipeline, the high-calorific-value analysis gas is supplied to the low-calorific-value fuel gas conveying pipeline according to the detection of the gas analyzer and the adjustment requirements of the calorific value, and then the high-calorific-value analysis gas is mixed through the mixing buffer tank; and the adjusted low-calorific-value fuel gas is conveyed to the hydrogen production reformer, so that the hydrogen production reformer can stably burn.

The application provides a two-dimensional RUB-18 zeolite membrane and a preparation method and application thereof in gas separation, and belongs to the technical field of two-dimensional nanosheet membrane preparation and gas separation, and the preparation method of the two-dimensional RUB-18 zeolite membrane comprises the following steps: ball-milling stripping to obtain a two-dimensional RUB-18 zeolite nanosheet solution; and placing a porous substrate into the two-dimensional RUB-18 zeolite nanosheet solution to perform electrophoretic deposition. The application provides a mild method for preparing two-dimensional RUB-18 zeolite nanosheets by ball-milling stripping, and the two-dimensional RUB-18 zeolite membrane is prepared from the two-dimensional RUB-18 zeolite nanosheets, which is simple, efficient, low in cost, and a two-dimensional RUB-18 zeolite membrane with a thickness of 200-800 nm can be grown on the porous substrate in 5-50 minutes, and the two-dimensional RUB-18 zeolite membrane can be successfully used for gas separation, and the permeability and selectivity can be considered.

The present disclosure relates to a pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and a hydrogen purification method using the same, and more particularly, the pressure swing adsorption apparatus of the present disclosure includes a plurality of adsorption towers including a pretreatment unit and a hydrogen purification unit wherein the adsorption towers of the pretreatment unit and the hydrogen purification unit are packed with different adsorbents, thereby achieving high purity hydrogen purification from mixed hydrogen gas produced after ammonia decomposition, making it easy to replace the adsorbent for ammonia removal, minimizing the likelihood that the lifetime of the adsorbent in the hydrogen purification unit is drastically reduced by a very small amount of ammonia, and actively responding to a large change in ammonia concentration in the raw material.Additionally, a hydrogen purification method using the pressure swing adsorption apparatus of the present disclosure physically adsorbs and removes impurities such as moisture (H2O), ammonia (NH3) and nitrogen (N2) included in mixed hydrogen gas produced after ammonia decomposition below extremely small amounts, thereby achieving high purity hydrogen purification with improved selective adsorption of moisture, ammonia and nitrogen and maximized hydrogen recovery rate and productivity. In addition, since the temperature swing adsorption process is not introduced, there is no need for a heat source for regeneration, thereby reducing the driving cost.

There are provided systems and methods for using fuel rich partial oxidation to produce an end product from waste gases, such as flare gas. Lambda sensor modifications and other control parameters that provide closed-loop mixture control at extremely fuel-rich operating conditions utilizing feed-forward and feedback approaches, physics-based engine models, novel use of a lambda sensor (02-based sensor), sensors with intermittent contact with the gas stream. In an embodiment the system and method use air-breathing engines having control systems, control parameters, sensors and input / output (I / O) for the fuel rich (ER of 1.2 and greater), partial oxidation of the flare gas to form syngas. In embodiments the syngas is further converted into an end product. In an embodiment the end product is methanol.

The utility model discloses filtering and purifying equipment with a good sealing effect, which comprises a box body, one side of the box body is communicated with an air inlet pipe, the other side of the box body is communicated with a first connecting pipe, the other end of the first connecting pipe is communicated with a shell, the outer part of the shell is provided with a backflow assembly, the outer part of the shell is communicated with an air exhaust pipe, and the air exhaust pipe is communicated with an air outlet. A control assembly is arranged outside the box body, a sealing assembly is arranged at the top of the box body, a filtering and purifying device is arranged in the box body, through the arranged structure, hydrogen can be filtered and purified, meanwhile, purity detection can be conducted on the filtered and purified hydrogen, and if the purity of the hydrogen is not qualified, the hydrogen can be filtered and purified. Hydrogen is conveyed to the gas inlet pipe for secondary filtration and purification, meanwhile, a worker can replace the filtration and purification device conveniently, meanwhile, the sealing performance between the box cover and the box body is guaranteed, and then the worker can use the filtration and purification device conveniently.