383results about "Noble gas compounds" patented technology

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

The invention provides an inert gas generation system, and relates to the technical field of industrial gas production. The inert gas generation system comprises the following modules: a gas pretreatment module, an intelligent separation module, a dynamic purification module, a pressure regulation and control module, a quality analysis module, a safety control module and an energy efficiency optimization module, and the gas pretreatment module is used for removing particulate matters through an electrostatic dust collection device by adopting a multi-stage gradient filtering algorithm based on ambient air input, adjusting humidity by combining a dew point control technology, forming a standardized gas source and generating a standard gas source. Through combination of a multi-stage gradient filtering algorithm and a dew point control technology, collaborative treatment of particulate matters and humidity is realized, stable gas source input is formed, the reliability of a subsequent processing link is improved, membrane separation parameters are dynamically predicted by applying a convolutional neural network model, and the permeation efficiency of a hollow fiber membrane stack is optimized.

The invention provides an oriented ultrathin FER zeolite molecular sieve membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing a monodisperse FER zeolite nanosheet with a high length-depth ratio through a hydrothermal method; preparing a seed crystal liquid, and coating the surface of a porous carrier with the seed crystal liquid to form an oriented seed crystal layer; and carrying out hydrothermal epitaxial growth in a secondary growth solution. Through innovative design of seed crystal synthesis and epitaxial growth, the FER zeolite membrane prepared by the method has a structure with high alpha-axis preferred orientation, submicron controllable thickness, compactness and no defect. The membrane can be used for accurately screening gas molecules with small size difference by utilizing six-membered ring pore channels uniformly arranged along an a axis. When helium and methane or carbon dioxide are separated, the membrane shows permeation flux and separation selectivity far superior to those in the prior art, provides a brand new technical approach for efficient and low-energy-consumption recovery of helium and other high-value gases in the industry, and has great industrial application value.

The invention relates to an air pre-impurity-removal control method and system for enrichment and separation of Kr, and relates to the technical field of gas separation and purification, and the air pre-impurity-removal control method comprises the following steps: removing impurity components in air through an impurity removal device to obtain air subjected to impurity removal treatment; carrying out multi-stage enrichment and separation treatment on the air subjected to impurity removal treatment to obtain enriched Kr gas; and introducing the enriched Kr gas into a chromatographic separation device, and separating krypton from other inert gases to obtain a target krypton component. The problems that in the traditional Kr enrichment and separation process, due to the fact that air impurities are prone to icing, the device is blocked, the multi-stage separation parameter adaptability is poor, and the enrichment efficiency is low are solved, and through pre-impurity removal of intelligent parameter configuration and multi-stage enrichment of gradient temperature control, the Kr separation stability, the enrichment efficiency and the target component purity are improved.

The invention relates to a Kr separation method and system based on selective desorption, a terminal and a storage medium, and relates to the technical field of rare gas purification. Calculating the difference between the quotient of the historical krypton loss amount and the adsorption column mass and the initial unit krypton adsorption amount to generate the actual unit krypton adsorption amount; calculating the quotient between the product of the actual unit krypton adsorption quantity and the mass of the adsorption column and the flow velocity of the single to-be-adsorbed air so as to generate actual adsorption time; controlling the first-stage adsorption column to adsorb the to-be-adsorbed air according to the actual adsorption time so as to generate a to-be-separated adsorption column; controlling the adsorption column cleaning device to clean the adsorption column to be separated according to the actual unit krypton adsorption quantity, and collecting desorbed gas after cleaning to the waste gas storage device; and performing desorption operation on the cleaned adsorption column, controlling a gas collection device to collect desorbed gas, and heating and activating the first-stage adsorption column to recover the adsorption capacity. The application has the effect of reducing krypton loss.

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.

The invention discloses a porous carbon particle adsorption material capable of preparing ultra-pure helium through one-step purification as well as a preparation method and application of the porous carbon particle adsorption material. The method comprises the following steps: (1) carbonizing biomass particles; (2) dipping the carbonized biomass particles in a nitrogen source-containing aqueous solution; (3) carrying out CO2 activation pore-forming and nitrogen functional group doping on the nitrogen source impregnated carbonized biomass particles obtained in the step (2) at high temperature; and (4) fully activating the nitrogen source impregnated carbonized biomass particles, performing programmed cooling, and introducing water vapor to perform secondary pore forming and oxygen functional group doping to obtain the porous carbon material. According to the method, the porous carbon particle adsorbent is prepared from natural biomass, the pore size distribution is concentrated, nitrogen and oxygen containing functional groups are rich, the adsorbent has ultrahigh adsorption and capture capacity on various impurities in the crude helium under the low-temperature condition, the impurities in the crude helium can be removed in one step, the helium is purified to reach the 6N standard, and the method is suitable for industrial production. And the application requirement of high-efficiency removal of impurities in the production process of ultra-pure helium is met.

The invention provides application of a silver modified AFX molecular sieve in xenon and krypton gas separation, and belongs to the technical field of gas separation. According to the invention, silver ions with electronegativity are introduced into AFX molecular sieve pores through ion exchange, selective adsorption of xenon is realized through the AFX topological molecular sieve subjected to Ag exchange so as to enrich xenon, and excellent separation of xenon and krypton is finally realized. The xenon and krypton adsorption isotherm of the silver modified AFX molecular sieve under the condition of 25 DEG C is tested, and the IAST (ideal adsorption solution theoretical value) of the molecular sieve is analyzed to be 36.5 through a static adsorption curve; according to the method disclosed by the invention, a dynamic penetration test is carried out under trace Xe and Kr concentrations by simulating the waste gas subjected to UNF post-treatment, and the dynamic capacity of Xe is calculated to be 104 mmol kg <-1 >, which is superior to that of other reported materials.

The utility model discloses a BOG helium extraction device with self-circulation guarantee. The BOG helium extraction device comprises a catalytic dehydrogenation unit, a crude helium extraction unit, a low-temperature helium purifier and a helium filling device, the catalytic dehydrogenation unit comprises a raw material gas BOG storage tank, a circulating compressor and a catalytic dehydrogenation device, and the raw material gas BOG storage tank is connected with the circulating compressor and the catalytic dehydrogenation device; the circulating compressor is connected with the oil separator, the oil separator is connected with the heat exchanger, the heat exchanger is connected with the second electric heater, the second electric heater is connected with the catalytic dehydrogenation device, the catalytic dehydrogenation device is connected with the heat exchanger, the heat exchanger is connected with the cooling tower, the cooling tower is connected with the first electric heater, and the first electric heater is connected with the crude helium extraction unit. The crude helium extraction unit is connected with the low-temperature helium purifier, and the low-temperature helium purifier is connected with the helium filling device. The helium extraction device disclosed by the utility model can be used for producing helium by utilizing enriched helium-containing BOG during operation, and the technology is high in helium enrichment concentration, small in investment, quick in equipment installation and flexible in operation.

The utility model provides a BOG (Boil Off Gas) dehydrogenation system, which belongs to the technical field of gas separation and comprises a dehydrogenation device, the dehydrogenation device is connected with a mixed gas source unit and a circulating heat exchange medium unit, and one end, far away from the mixed gas source unit, of the dehydrogenation device is connected with a dehydrogenation mixed gas unit; the dehydrogenation device comprises a heat exchange box body, a plurality of hydrogen storage alloy tank bodies are arranged in the heat exchange box body, each hydrogen storage alloy tank body is connected with a mixed gas inlet and a mixed gas outlet, the mixed gas inlet is connected with a mixed gas source unit, and the mixed gas outlet is connected with a dehydrogenation mixed gas unit; the BOG gas dehydrogenation system further comprises a control system, and the control system is connected with the dehydrogenation device. According to the BOG dehydrogenation system disclosed by the utility model, the purpose of hydrogen separation is achieved by adopting reversible reaction of hydrogen storage alloy and hydrogen adsorption, the process is carried out under the conditions of normal temperature and low pressure, and compared with the existing methods of low-temperature separation, high-pressure adsorption and the like, the energy consumption is greatly reduced, and energy conservation and emission reduction are facilitated.

The invention discloses an argon recovery system for EIGA powder preparation, belongs to the technical field of gas recovery, and solves the problems that the step is added for further purification after argon recovery every time, so that excessive energy is consumed, the cost of recovered argon is forcibly increased, and the production cost is reduced. Therefore, whether low-concentration impurities such as CO and H2 are mixed in argon or not needs to be detected in the argon recovery process. Comprising a pretreatment module, a filtration and purification module, a deep purification module, a pressurized gas storage module and a low-concentration impurity detection module. According to the device, argon is sampled in a split-flow mode, impurity gathering is enhanced through a sound field, detection, signal processing and the like are carried out, errors are corrected through temperature and pressure compensation, alarm is triggered, emergency purification is controlled, real-time detection and closed-loop control of the CO / H2 in the argon as low as 0.5 ppm / 0.3 ppm are achieved, routes can be switched through an execution module, the argon is treated through a chemical looping combustion reactor, impurities are removed, and the device is suitable for industrial production. And purity of argon is ensured.

The application relates to the technical field of film materials, in particular to a mixed matrix membrane and a preparation method and application thereof. Toluene is added into a viscous polyamine acid solution, the temperature is increased to 200-250 DEG C, and stirring reaction is carried out for 5-8 hours, then the precipitate is obtained through centrifugation, the precipitate is washed with methanol for 3-5 times, and the product COOH-PI is obtained through drying; zinc nitrate hexahydrate and 2-methyl imidazole are dissolved in methanol, stirring reaction is carried out at room temperature for 3-8 hours, then the product is taken out and centrifuged, the product is washed with anhydrous methanol for 3-5 times, and ZIF-8 is obtained through drying; NH2-ZIF-8 is synthesized by using the same method; COOH-PI is added into DMF and stirred to obtain a PI solution, ZIF-8 and NH2-ZIF-8 are respectively added into DMF, and MOF suspension is obtained through ultrasonic treatment for 2-5 hours, then the MOF suspension is added into the PI solution, stirring is carried out at room temperature for 24-36 hours, the casting solution obtained is poured into a flat and clean glass plate, heating is carried out at 60-65 DEG C for 24-48 hours, then the formed membrane is dried to obtain the mixed matrix membrane. The preparation condition of the mixed matrix membrane is mild, the stability of the membrane is obviously improved, and the mixed matrix membrane has high selective permeability to helium.

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.

Provided is a waste gas treatment device including a waste gas inlet configured to introduce waste gas discharged from a semiconductor processing chamber and an adsorption unit configured to adsorb competitive adsorption gas from the waste gas flowing from the waste gas inlet, and configured to adsorb xenon (Xe) from the waste gas from which the competitive adsorption gas has been removed, and recover the adsorbed xenon. Also provided are waste gas treatment methods, and waste gas adsorption and recovery systems including the present waste gas treatment devices.

The utility model discloses a helium dehydrogenation and purification device taking air as regenerated gas. The helium dehydrogenation and purification device comprises a catalytic dehydrogenation reactor, a first adsorption reactor and a second adsorption reactor, a refrigerant of the heat exchanger is connected with a feed gas source and a compressed air source, a refrigerant outlet of the heat exchanger is connected with an inlet of the catalytic dehydrogenation reactor, an outlet of the catalytic dehydrogenation reactor is connected with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is connected with an inlet of the steam-water separator; inlets of the first adsorption reactor and the second adsorption reactor are connected with an outlet of the steam-water separator and a regenerated waste gas outlet; outlets of the first adsorption reactor and the second adsorption reactor are connected with a product gas outlet and a compressed air source; a hydrogen analyzer and a flow meter are arranged on a pipeline for connecting a refrigerant inlet of the heat exchanger with the feed gas source, and a flow controller and a flow control valve are arranged on a pipeline for connecting the refrigerant inlet of the heat exchanger with the compressed air source; the flow controller is electrically connected with the hydrogen analyzer and the flow meter and can control the opening degree of the flow control valve. The problem that hydrogen-containing gas cannot be provided as regeneration gas in most helium catalytic dehydrogenation purification scenes is solved.

The invention discloses an argon recovery system and method based on nano-catalysis and membrane separation synergy, the system comprises an argon pretreatment module, a nano-catalysis reaction module, a membrane separation synergy module and a rectification system, the pretreatment module removes particulate matters, oil and hydrocarbon impurities through a cyclone separator, an activated carbon adsorption tower and a precision filter; the nano catalytic module adopts a multi-tube fixed bed reactor, a Pt-CeO2-loaded carbon nanotube and ZSM-5 molecular sieve composite catalyst is arranged in the nano catalytic module, and CO and O2 are catalytically removed at the temperature of 180-220 DEG C; the membrane separation module realizes argon-nitrogen separation through a hollow fiber membrane group and a pressure swing adsorption unit which are connected in parallel, argon-rich gas is rectified and purified at-180 to-190 DEG C through a low-temperature rectifying tower, and nitrogen-containing gas at the tower top is returned to the membrane separation for circular treatment; the rectification system is integrated with a condensation evaporator, and tower top gas condensation and tower kettle liquid argon evaporation are simultaneously driven by a liquid nitrogen refrigerant, so that cold and heat coupling is realized; the system is provided with an intelligent control module to adjust the catalytic temperature, the membrane separation parameters and the reflux ratio in real time.

An apparatus for extracting and utilizing noble gases from carbonate rock includes a container body. A gas-solid separation assembly defines filter pores, and a diameter of each filter pore is micrometer-scale. A mechanical crushing assembly is disposed at a bottom of the gas-solid separation assembly, and is configured to crush a carbonate-rock sample until particles each have a size on the order of micrometers or larger. The gas-solid separation assembly is elastic. The particle deposition device is disposed inside a crushing chamber. The particle deposition device includes connecting ropes and spheres. The connecting ropes are fixed to an inner wall of the crushing chamber, and the spheres are fixed to the connecting ropes. This apparatus not only avoids the generation of large quantities of impurity components, but also separates solid carbonate-rock sample particles from the noble gases, enabling effective extraction of the noble gases from the carbonate-rock sample for utilization.

The invention belongs to the technical field of helium extraction equipment, and relates to a natural gas impurity removal device for extracting helium, which comprises a tank body, a transmission shaft, an oxygen pipe, a gas outlet pipe, a first annular pipe, a first gas transmission assembly, a plurality of reaction pipes, a second gas transmission assembly and a rotating assembly, and the third gas conveying assembly is used for conveying the helium subjected to impurity removal in the first annular pipe to the gas outlet pipe, so that the helium subjected to impurity removal is discharged from the gas outlet pipe. According to the invention, oxygen and hydrogen are introduced through the plurality of reaction tubes and then are shunted, so that the contact path of the oxygen and the hydrogen is increased, the oxygen and the hydrogen in each reaction tube can relatively collide, the mixing effect of the oxygen and the hydrogen is improved, the contact of the oxygen and the hydrogen is more sufficient, and the removal effect of the hydrogen is improved; the plurality of reaction tubes are driven by the transmission shaft to rotate to generate centrifugal force to separate helium from water, so that new impurities are prevented from being introduced into the helium, the impurity removal effect of the helium is improved, and the purity of the helium is ensured.

This paper discloses a rapid cyclic pressure swing adsorption (PSA) method for separating O2 from N2 and / or Ar. The method uses a carbon molecular sieve (CMS) adsorbent with a driving force of 1 atma and 86 atma, as indicated by a linear driving force model. o F measures at least 5% O2 / N2 and / or O2 / Ar kinetic selectivity and at least 0.2000% O2 adsorption rate (1 / s).

The application discloses a helium low-temperature purification pressure building device and a pressure building method, which comprise a flash evaporation unit, a purification unit and a heat recovery unit connected in sequence. In the application, the product gas of the liquid air separator is used to build pressure for the adsorber under the regeneration pressure building in the high-pressure working state, so that the adsorber under the working state is prevented from charging pressure for the adsorber under the regeneration pressure building and the pressure of the adsorber under the working state is prevented from being lost. Since the pressure difference between the liquid air separator and the adsorber under the regeneration pressure building is large, the high-pressure impact is easy to cause the damage of the equipment, the pressure building process is arranged in the purification process, the time required for the pressure building is reduced, the adsorber under the working state is saturated, the adsorber under the regeneration state is built in pressure, automatic switching can be realized, the continuous production of the product high-purity helium gas is realized, and the use demand of the high-purity gas is met.

The utility model relates to a molecular sieve device for krypton and xenon production, which comprises a pipeline with a rectangular section, a plurality of screening mechanisms are arranged on the pipeline along the length direction, a plurality of strip-shaped insertion holes which vertically extend are arranged on the right side wall of the pipeline and are in one-to-one correspondence with the screening mechanisms, and the screening mechanisms can be inserted into the strip-shaped insertion holes; the screening mechanism comprises a rectangular frame body, the two faces of the frame body are both covered with net faces, and the frame body is filled with molecular sieve filler. A vertically-through upper opening is formed in the top edge of the frame body, and a vertically-through lower opening is formed in the bottom edge of the frame body. The right side edge of the frame body is provided with a horizontally-through plugboard hole, and the plugboard hole corresponds to the position of the lower opening; and the plug board penetrates through the plug board hole and extends into the lower opening. The multi-stage screening mechanism is adopted, compared with the prior art, a better impurity gas removing effect is achieved, the molecular sieve filler of a certain screening mechanism can be replaced according to needs, and the replacement process is simpler.

The utility model relates to the technical field of gas production equipment, in particular to full-automatic ultra-pure helium and xenon gas purification equipment, when the full-automatic ultra-pure helium and xenon gas purification equipment is used, a catalyst is respectively arranged in each group of lower tank bodies, and a worker operates gas to enter the first group of lower tank bodies to carry out purification operation through the catalyst; when the catalyst in the first group of lower tank body needs to be replaced, the gas can be continuously purified while the catalyst is replaced, so that the processing efficiency is improved; comprising a supporting seat, lower tank bodies, upper tank bodies and supporting legs, the supporting legs are arranged at the bottom end of the supporting seat, two groups of lower tank bodies are fixedly mounted on the supporting seat, one group of upper tank bodies is detachably arranged at the top end of each group of lower tank bodies, the device further comprises locking assemblies, an air inlet assembly and an air exhaust assembly, and the lower tank bodies and the upper tank bodies are connected through a plurality of groups of locking assemblies. The output ends of the two groups of lower tank bodies are respectively communicated with the exhaust assembly, and the input ends of the two groups of upper tank bodies are respectively communicated with the output end of the air inlet assembly.

The present invention relates to the field of ammonia synthesis technology, and more specifically to a low-carbon, high-temperature gas-cooled reactor ammonia synthesis system and a low-carbon, high-temperature gas-cooled reactor ammonia synthesis method. The system provided by the present invention utilizes the heat of the high-temperature helium from the high-temperature gas-cooled reactor unit through a steam heat exchange unit and uses the resulting high-pressure, high-temperature steam in the ammonia synthesis unit, thereby providing the ammonia synthesis reaction conditions in the ammonia synthesis unit and improving energy utilization efficiency. Furthermore, the method provided by the present invention simplifies the process flow, particularly by utilizing the high-temperature, low-carbon heat energy from the high-pressure gas-cooled reactor to provide a high-temperature environment for the ammonia synthesis reaction, thereby reducing carbon emissions.

The invention provides an inorganic membrane for extracting helium as well as a preparation method and application of the inorganic membrane. The inorganic membrane comprises a molecular sieve membrane and a protective coating, the molecular sieve membrane comprises a carrier and a molecular sieve layer, the protective coating is located on the surface of the side, away from the carrier, of the molecular sieve layer, and the protective coating comprises beta-cyclodextrin and / or polydimethylsiloxane. The inorganic membrane for helium extraction comprises the molecular sieve membrane and the protective coating, the protective coating comprises beta-cyclodextrin and / or polydimethylsiloxane, and due to the existence of the protective coating, the separation selectivity of the inorganic membrane on helium in mixed gas containing helium and methane can be high.

The invention belongs to the field of helium extraction, and particularly relates to a hot spring associated helium extraction device and method. The device comprises an aeration inner cavity and an aeration outer cavity. The aeration inner cavity comprises a first cavity body, a plurality of nozzles arranged at the upper end of the first cavity body along the circumferential direction of the first cavity body, and a liquid inlet arranged at the lower end of the first cavity body and used for introducing thermal spring water. The aeration outer cavity comprises a second cavity body arranged on the outer side of the aeration inner cavity, a liquid outlet which is formed in the lower end of the second cavity body and is used for leading out thermal spring water, and a gas outlet which is formed in the top of the second cavity body and is used for leading out helium-containing gas. The device can efficiently separate out associated helium in thermal spring water, has the characteristics of small occupied area, low energy consumption and the like, and has a good application prospect in the field.

To provide a gas separation method and a gas separation apparatus capable of easily continuing the separation of target gas from raw material gas even when concentration of the target gas in the raw material gas fluctuates.SOLUTION: A gas separation method according to the present invention is a gas separation method for separating a target gas from raw material gas by a pressure fluctuation adsorption, includes a separation cycle which repeats the steps of, in this order, an adsorption step of supplying the raw material gas to an adsorption unit and adsorbing the target gas in the raw material gas on the adsorption unit, a purge step of supplying the target gas stored in a target gas storage tank to the adsorption unit, and a separation step of desorbing the target gas adsorbed on the adsorption unit from the adsorption unit and supplying and storing the desorbed target gas in the target gas storage tank, where a target gas supply amount, which is an amount of the target gas supplied to the adsorption unit in the purge step, is adjusted according to target gas concentration, which is concentration of the target gas in the raw material gas supplied to the adsorption unit in the adsorption step.SELECTED DRAWING: Figure 1

The application discloses a helium collection system and seawater helium collection equipment, which comprises a separation tank body, a gas separation net arranged in the separation tank body, a conveying pipeline penetrating through the separation tank body, a separation assembly arranged in a first chamber of the separation tank body, and a collection assembly communicated with the first chamber through a gas outlet arranged at the top of the separation tank body. The gas separation net divides the inner cavity of the separation tank body into the first chamber and a second chamber arranged in a vertical mode. The conveying pipeline extends along the arrangement direction of the first chamber and the second chamber, and the outlet end of the conveying pipeline is arranged in the first chamber, the inlet end of the conveying pipeline penetrates through the bottom of the separation tank body, and a gas-water inlet is connected to the conveying pipeline. The conveying pipeline is configured to convey a gas-water mixture into the second chamber, and the separation assembly is configured to separate helium from liquid. The helium enters the collection assembly through the gas outlet, and the liquid enters the second chamber and is discharged. The application solves the problem of insufficient helium resources in China.

The application relates to the technical field of gas filtering materials, in particular to a polyimide film composite material and a preparation method and application thereof, the composite material is mainly made of polyimide and Zn / g-C3N4, Zn / g-C3N4 accounts for 10-20 wt% of the mass of the polyimide; the preparation method is that the polyimide is stirred in a solvent to obtain a polyimide casting solution, then Zn / g-C3N4 is poured into the polyimide casting solution, stirring is carried out at 60-80 DEG C for 8-12 h, cooling is carried out to room temperature for 1-4 h, the defoaming casting solution is poured on a glass plate, a film with a thickness of 50-80 mu m is scraped out by using a coating machine, the scraped film is dried under vacuum at 100-120 DEG C for 8-12 h, peeling is carried out, annealing is carried out at 200-230 DEG C for 8-12 h, the obtained Zn / g-C3N4 composite polyimide film is placed in a plasma reactor for plasma treatment, and the polyimide film composite material is obtained. The polyimide film composite material can be used for efficient purification of helium, high selectivity is achieved while high flux is met, and high stability is also achieved.

A method of separating hydrogen from a gas comprising helium includes receiving an input gas stream comprising hydrogen and helium and forwarding the input gas stream to at least one first membrane module comprising at least one first hydrogen-selective membrane for performing a first separation process for separating hydrogen, forwarding a first retentate from the at least one first membrane module to at least one second membrane module comprising at least one second hydrogen-selective membrane for performing a second separation process for separating hydrogen in the first retentate, providing a hydrogen stream comprising the first permeate and the second permeate from the at least one second membrane module and providing a helium stream comprising the second retentate from the at least one second membrane module. The disclosure includes a related method of extracting hydrogen and helium from a gas source and a related membrane module system.

An apparatus and process for drying a product gas for supplying the gas to a downstream user such that the product gas may be dried to remove water from the gas that may be absorbed or adsorbed during an initial start-up phase of production and / or delivery of the product gas (e.g., from a conduit that may have been exposed to water during installation). Therefore, the product gas can be delivered downstream to the user instead of being exhausted. Some embodiments may be configured to utilize a removable, mobile water redistribution device that may be completed during an initial start-up phase of product gas delivery and that provides a pipeline layout of product gas is transported to a new location after the product gas has been dried via an operation for an initial start-up period.