30 results about "Hydrogen+Methane" patented technology

The invention discloses a preparation method of a large-thickness (111) crystal orientation monocrystal diamond for a semiconductor, and aims to solve the problems of low growth rate and poor growth quality of the (111) crystal orientation diamond. The preparation method of the monocrystal diamond comprises the following steps: S1, heating and soaking a seed wafer in mixed acid; s2, performing etching treatment on the seed wafer by using hydrogen plasma; s3, oxygen is introduced into the vacuum cavity; s4, methane continues to be introduced into the vacuum cavity, the volume concentration of methane, hydrogen and oxygen is controlled, and microwave plasma chemical vapor deposition growth is carried out; s5, controlling the growth time; and S6, polycrystals on the surface of the blank are cut off. According to the method, the MPCVD process is adopted, and parameters such as gas concentration, temperature, pressure intensity and microwave energy in the growth process are controlled, so that homoepitaxial growth of the high-quality single crystal (111) crystal orientation diamond is realized, the production cost of the (111) crystal orientation diamond is reduced, and the realization of mass production of the (111) crystal orientation single crystal diamond is facilitated.

This utility model discloses a safety performance testing chamber for mining electromechanical equipment, including a chamber body, an explosion-proof door, an observation window, a top sealing mechanism, an intermediate sealing partition, a foundation, and pipeline interfaces. The chamber body is a rectangular steel structure, using a composite design of steel plates and grid-shaped reinforcing ribs, and is made of carbon steel and stainless steel composite materials, making it vibration-resistant and explosion-proof. The intermediate sealing partition is removable, dividing the chamber body into two small compartments or forming a complete large chamber, flexibly adapting to the testing of small or large diesel engines. The top sealing mechanism uses a U-shaped groove and a venting membrane seal, allowing for rapid pressure relief in the event of an explosion. The side walls are equipped with a rotating explosion-proof door and a high-temperature tempered glass observation window for easy entry, exit, and observation. The foundation is fixed with anchor bolts, and the interior and exterior of the chamber are coated with antistatic, flame-retardant, and rust-proof paint. This utility model can withstand the impact of a methane-air or methane-hydrogen-air mixture explosion, ensuring safety; it is suitable for verifying the safety performance of diesel engines in underground coal mines, and has the advantages of high efficiency, safety, and economy.

The invention relates to a methane, hydrogen and hydrogen-doped methane under-expansion jet fire flame evaluation processing method and application. The method comprises the following steps: acquiring the proportion of each gas component in a mixed gas, the absolute pressure of the mixed gas and the temperature of the mixed gas; determining the molar mass, the gas adiabatic index and the air-fuel ratio of the mixed gas according to the proportion of each gas component; the constant-pressure adiabatic combustion temperature of the mixed gas is determined according to the proportion of all the gas components and the first law of thermodynamics; the gas speed at the leakage opening is determined; determining the gas density at the leakage port; the flame Froude number of the under-expansion jet flame is determined according to the air-fuel ratio of the mixed gas, the constant-pressure adiabatic combustion temperature, the gas density at the leakage opening and the gas speed at the leakage opening; and determining the flame length of the under-expansion jet flame according to the flame Froude number of the under-expansion jet flame and the proportion of each gas component in the mixed gas. In this way, the flame length of the under-expansion jet flow flame can be accurately and consistently determined.

This invention relates to the field of metallurgical technology, and more particularly to a method for preparing vanadium nitride using a mixed reducing gas. The method includes: grinding vanadium trioxide uniformly and pressing it into vanadium pentoxide tablets; placing the tablets in an electric furnace; first heating to 500-700°C under a nitrogen atmosphere; then introducing a mixed gas of methane, hydrogen, and nitrogen and holding for 20 minutes; then further heating to 800-850°C and holding for 20 minutes to obtain high-purity vanadium trioxide; subsequently heating to 1050-1150°C and holding for 1-5 hours to obtain crude vanadium nitride; stopping the introduction of the reducing gas and holding at 1050-1150°C for 0-4 hours under a nitrogen atmosphere; and then cooling to room temperature to obtain high-quality vanadium nitride. The technical solution mentioned in this invention features a low-temperature, short-time, and simple-to-operate vanadium nitride preparation process, enabling its large-scale application. Simultaneously, the resulting products are carbon monoxide and hydrogen, both of which can be recycled, thus helping to reduce carbon emissions.

The utility model relates to the technical field of chemical production, and discloses a methane hydrogen recovery device which comprises a regeneration gas unit, a regeneration gas separation tank, a methane hydrogen compressor, a first overline pipeline and a second overline pipeline, the regeneration gas separation tank is connected with the regeneration gas unit through a second main pipeline, the methane hydrogen compressor is connected with the regeneration gas separation tank through a third main pipeline, and the methane hydrogen compressor is connected with the hydrogen production device through a fourth main pipeline; the first overline pipeline is connected with the first main pipeline and the second main pipeline, the second overline pipeline is connected with the first main pipeline and the third main pipeline, and each overline pipeline is provided with a regulating valve. Compared with the prior art, the methane hydrogen recovery device fully recovers the surplus methane hydrogen of the ethylene device and uses the surplus methane hydrogen as a raw material of the hydrogen production device, so that the problem that the surplus methane hydrogen of the ethylene device in the prior art can only release a torch is solved.

The embodiment of the invention provides a light hydrocarbon separation system and method and a light hydrocarbon preparation system. The system comprises a demethanation unit, a decarburized light hydrocarbon unit, a low-temperature heat exchange unit, a first expansion unit and a second expansion unit, the decarburized light hydrocarbon unit is used for receiving the residual material conveyed by the demethanation unit and separating out the decarburized light hydrocarbon; the first expansion unit is used for receiving the methane hydrogen, performing expansion treatment on the methane hydrogen, and conveying the expanded methane hydrogen to the low-temperature heat exchange unit to serve as a refrigerant of the low-temperature heat exchange unit to provide cooling capacity; and the second expansion unit is used for receiving the gas-phase carbon disulfide hydrocarbon, carrying out expansion treatment on the gas-phase carbon disulfide hydrocarbon and conveying the expanded carbon disulfide hydrocarbon to the low-temperature heat exchange unit so as to serve as a refrigerant of the low-temperature heat exchange unit to provide cooling capacity. According to the system, the carbon disulfide light hydrocarbon in the separation process is conveyed to the low-temperature heat exchange unit to serve as a refrigerant to provide cooling capacity, and energy consumption of light hydrocarbon separation is remarkably reduced.

The system is characterized in that the input end of a methane hydrogen heater is communicated with a demethanizer, and the output end of the methane hydrogen heater is communicated with the input end of a liquid phase dryer; the output end of the mixed C4 heater is communicated between the output end of the methane hydrogen heater and the input end of the liquid phase dryer; the output end of the gas-liquid separation tank is communicated with the input end of the regenerated methane hydrogen coalescer; and the output end of the regenerated methane hydrogen coalescer is communicated with the input end of an external fuel pipe network. According to the utility model, a mixed C4 steam stripping process and a regenerated methane hydrogen secondary dehydration process are added, so that the water content in regenerated methane hydrogen gas is ensured to meet the requirements of receiving conditions of a fuel gas pipe network. According to the system for regenerating and recycling olefin by using methane hydrogen, disclosed by the invention, a mixed C4 and methane hydrogen medium is self-produced, so that the purpose of regenerating and recycling ethylene-propylene olefin substances by using the liquid-phase dryer is achieved, the nitrogen consumption and the torch gas emission are reduced, and the ethylene-propylene yield and the resource utilization rate are improved.

The invention provides a system and a method for reducing ethylene loss of a light cracking raw material, and belongs to the field of petrochemical industry. The system comprises a compression unit, wherein pyrolysis gas is introduced into an inlet of the compression unit; the multi-stage cooling and separating unit comprises at least three stages of coolers and corresponding separating tanks, and an inlet of the multi-stage cooling and separating unit is communicated with an outlet of the compression unit; an inlet of the demethanizer is respectively communicated with liquid phase outlets of all stages in the multi-stage cooling and separating unit; the first expansion compressor unit is communicated with a gas phase outlet of the last stage of the multi-stage cooling separation unit and a tower top gas outlet of the demethanizer; an inlet of the second expansion compressor unit is communicated with a tower top gas outlet of the demethanizing tower, and an outlet of the second expansion compressor unit is communicated with an inlet of the compression unit. The system provided by the invention reduces the loss of ethylene along with hydrogen from two aspects of separation precision and circulation optimization, and finally reduces the loss of ethylene in the methane hydrogen product.

To provide a hydrogen supply device for a methane gas fermentation tank capable of safely and easily eliminating clogging SOLUTION: In a biomethanation reaction for converting carbon dioxide (CO2) contained in a biogas into methane (CH4) by adding hydrogen into a digestive liquid of a methane fermentation tank, a hydrogen gas feeder 11 is inserted and arranged through an insertion part 7 provided in the methane fermentation tank 1. The hydrogen gas supply device includes a first tube part configured such that a distal end region thereof is positioned in the digestive juice W, and a second tube part disposed in the first tube part so as to be capable of being inserted into and pulled out from the first tube part and having a length capable of protruding from a distal end open region of the first tube part, and the second tube part has a hydrogen gas blowing region communicating with the inside of the tube in a protruding region protruding from the distal end open region of the first tube part.SELECTED DRAWING: Figure 2

The invention discloses a quantitative traceability measuring method for a mixed gas source of a working face, and belongs to the technical field of underground gas disaster prevention and control. At least two drill holes are drilled in each drill site upwards adjacent to the coal seam, at least two drill holes are drilled in the coal seam, at least two drill holes are drilled in the drill site downwards adjacent to the coal seam, and at least one coal sample is taken from each drill hole; s2, measuring a methane carbon isotope value (13C), an ethane carbon isotope value (13C), a carbon dioxide carbon isotope value (13C), a methane hydrogen isotope value (2H) and an ethane hydrogen isotope value (2H) of each coal sample; s3, measuring the isotope value of the gas sample of the mixed source gas; and s4, performing quantitative traceability analysis. According to the method, the hydrocarbon same-digit measuring technology is adopted, the symbolic hydrocarbon isotope value of each coal seam is effectively utilized, the proportion of the mixed source gas sample from each coal seam is calculated by establishing a mathematical model, the source of the mixed source gas sample is quantitatively traced, the distinction degree is high, and the accuracy is high.

The invention provides a light hydrocarbon separation system and a method thereof. The system comprises a demethanation unit, a decarburized light hydrocarbon unit and an expansion unit, wherein the demethanation unit comprises a first condenser; the demethanation unit, the decarburized light hydrocarbon unit and the expansion unit are sequentially connected through pipelines, and the expansion unit is connected with the first condenser through a pipeline; the demethanization unit is used for separating out methane hydrogen in a material, and the first condenser is used for cooling the methane hydrogen; the decarburized light hydrocarbon unit is used for receiving the residual material conveyed by the demethanation unit and separating out the decarburized light hydrocarbon; the expansion unit is used for receiving the gas-phase carbon disulfide hydrocarbon and conducting expansion treatment on the gas-phase carbon disulfide hydrocarbon, and liquid-phase carbon disulfide hydrocarbon obtained after expansion is conveyed to the first condenser to serve as a refrigerant of the first condenser to provide cooling capacity. According to the system, the carbon disulfide light hydrocarbon in the separation process is conveyed to the condenser to serve as a refrigerant to provide cooling capacity, and energy consumption and cost of light hydrocarbon separation are remarkably reduced.

The present invention belongs to the technical field of dry gas concentration and gas separation, and discloses a method and device for separating concentrated gas after concentration based on a change in dry gas raw material. The present invention adds an expander to the top of the absorption tower, and adds an ethylene coarse separation tower after the concentration, and provides the methane hydrogen cooling capacity of the expanded absorption tower top to the coarse separation tower. The crude ethane at the bottom of the coarse separation tower meets the ethane furnace feeding conditions without consuming the cooling capacity of the public works. The crude ethylene at the top of the tower does not contain carbon triple components and does not need to pass through a depropanizer, but only needs to pass through a demethanizer and an ethylene refining tower for separation. The dry gas raw material of the dry gas concentration device is changed from the hydrocarbonized tail gas produced by the gas-phase dry gas to ethylbenzene production device to catalytic dry gas. Compared with the original process, the present invention can reduce the total energy consumption by 21.2%; through the method of separation after concentration, the liquid-phase method is used to produce ethylbenzene instead of the gas-phase method, and 1.2 tons / h of high-grade ethylbenzene can be produced; thus significantly reducing energy consumption and improving product quality.

The invention belongs to the technical field of refinery dry gas treatment, and discloses a method and a system for preparing hydrogen for a fuel cell by refinery dry gas C2 recovery coupling, the method comprises the following steps: 1) deoxidizing; 2) compressing; 3) cooling; 4) absorption: feeding the cooled refinery dry gas into an absorption tower to obtain a tower kettle material flow and tower top tail gas; 5) desorption: the tower kettle material flow of the absorption tower enters a desorption tower, and the recovered C2 concentrated gas is obtained at the top of the tower; 6) reabsorption: enabling the tail gas at the top of the absorption tower to enter a reabsorption tower to obtain tower kettle material flow and methane hydrogen tail gas at the top of the tower; 7) stabilizing; and 8) performing vacuum pressure swing adsorption or membrane separation and pressure swing adsorption to obtain the hydrogen for the fuel cell. According to the method, the absorption temperature is high, ethylene and propylene refrigeration compressors and expansion machines are not needed, the energy consumption is low, the investment is small, and the operation is simple; and C2 and hydrogen resources in the refinery dry gas are effectively recovered.

The invention relates to a method and a system for regenerating a desulfurization adsorption bed of an ethylene unit, the method is characterized in that preheated vaporized ethane preheated by a cold box is divided into two streams, one stream is used as regenerated gas to perform regeneration treatment on the desulfurization adsorption bed and returns to a cracking furnace of the ethylene unit to participate in cracking reaction after being cooled; the other part is used as diluted temperature-adjusted ethane to return to the cracking furnace of the ethylene device to participate in cracking reaction, water is not introduced into the circulating ethane in the whole process, and wet hydrogen sulfide is not formed, so that an alkali washing system additionally arranged for treating the wet hydrogen sulfide can be reduced, the occupied area and equipment investment of the system are reduced, and the competitiveness of the ethylene device is further improved. Moreover, according to the system disclosed by the invention, the methane hydrogen generated by the ethylene device is directly used as a fuel to return to the combustor of the cracking furnace after heat exchange, and sulfides are not introduced, so that the problem that the sulfides in the discharged flue gas after combustion of the methane hydrogen exceed the limit can be avoided, and the environment-friendly up-to-standard emission of the flue gas is realized.

The present disclosure relates to a system and method for producing low-carbon olefins and aromatics from catalytic conversion of light hydrocarbon oil, which independently sets the device for cracking reaction and the device for catalyst regeneration, and can improve the adaptability and safety of the system. A second regeneration catalyst cooler is arranged on the second regeneration inclined pipe to reduce the temperature of a part of the regenerated catalyst, which can flexibly adjust the catalyst activity and concentration in the riser reactor, significantly increase the catalyst / oil ratio, improve the contact area between the raw material and the catalyst, significantly enhance the catalytic reaction, improve the yield of low-carbon olefins and low-carbon aromatics, and reduce the yield of methane hydrogen and coke. In addition, an oil-gas quencher is arranged in the system of the present disclosure to quickly reduce the temperature of the reaction oil-gas at the outlet of the reactor, avoid the safety hazards caused by excessive thermal cracking and condensation coking of the reaction oil-gas in the large oil-gas pipeline at the outlet of the reactor, and effectively utilize the heat in the high-temperature reaction oil-gas.

The application belongs to the technical field of membrane preparation and application, and discloses a modification method for improving the gas separation performance of carbon molecular sieve membranes. The hydrogen / methane, hydrogen / nitrogen and hydrogen / carbon dioxide separation performance of the carbon molecular sieve membrane is improved in the form of impregnating an oxidizing agent. The hydrogen / methane, hydrogen / nitrogen and hydrogen / carbon dioxide selectivity of the carbon molecular sieve membrane is changed by introducing oxygen-containing functional groups into the carbon molecular sieve membrane, and the carbon molecular sieve membrane has a wide application prospect in the field of gas separation membranes.

The present application relates to the technical field of gas permeability test, and more particularly to a device and method for testing the permeability of a mixture of methane and hydrogen in a polymer sample, characterized in that the device comprises a piston, a fixed iron plate, a methane filling chamber, a methane-hydrogen mixing chamber, a permeated gas concentration detection chamber, a pressure gauge, a connecting pipeline, a stop valve, a fixed screw, a fixed nut, a polymer sample, a gas cylinder, and a gas sensor; compared with the closest prior art, the device can adjust the mixing ratio of methane and hydrogen; and can also test the permeability of a mixture of methane and hydrogen with different ratios. The test results obtained by the present application are closer to the actual service conditions of polymer materials and elastomer seals in a mixed gas environment.

The invention belongs to the field of ethylene and related technologies, and discloses a dryer regeneration system and method for gas raw material cracking. The system comprises a gas cracking raw material pipeline, a regeneration gas heat exchange unit, a distribution unit, a dryer user and a regeneration gas treatment unit. Methane / hydrogen tail gas or hydrogen-rich tail gas generated by conventional cracking is not used, circulating ethane generated by a cracking device and raw material ethane gas and raw material propane gas of the device are adopted as regeneration gas, the hydrogen-rich gas can be kept at high pressure and directly used as raw material gas of a PSA hydrogen concentration device, power consumption of a compressor of a PSA unit is reduced, and the energy consumption of the PSA unit is reduced. And the energy consumption of the whole device is reduced while more hydrogen products are produced as byproducts.

To provide a marine engine fuel supply device capable of supplying fuel containing methane CH4 and hydrogen H2 to a marine engine without using a hydrogen storage tank.SOLUTION: A marine engine fuel supply device comprises: an LPG reformer 40 (reforming device) that uses LPG (liquefied petroleum gas) as a raw material to produce methane-rich gas containing methane CH4, hydrogen H2, and carbon dioxide CO2; and a CO2 separator 50 (removal device) that removes part of carbon dioxide contained in the methane-rich gas produced by the LPG reformer 40 and supplies the gas to a marine engine. The methane-rich gas produced by the LPG reformer 40 has a carbon dioxide (CO2) concentration of less than 20 vol% and a hydrogen (H2) concentration of 10 vol% or more.SELECTED DRAWING: Figure 1

The present disclosure relates to a down-flow bed reaction system and method for producing low-carbon olefins and aromatics from catalytic conversion of light hydrocarbon oil, which independently sets the device for cracking reaction and the device for catalyst regeneration, and can improve the adaptability and safety of the system. The down-flow bed reactor in the order of gravitational field can reduce the gas-solid axial back mixing, and thus can improve the yield of low-carbon olefins and low-carbon aromatics. The second regeneration catalyst cooler is arranged on the second regeneration inclined pipe, which can flexibly adjust the catalyst activity and concentration in the down-flow bed reactor, significantly increase the catalyst-oil ratio, improve the yield of low-carbon olefins and low-carbon aromatics, and reduce the yield of methane hydrogen and coke. In addition, the high-temperature reaction oil gas quencher arranged in the system of the present disclosure can quickly reduce the temperature of the reaction oil gas, avoid the safety hazards caused by excessive thermal cracking and condensation coking of the reaction oil gas in the reactor outlet large oil gas pipeline, and effectively utilize the heat in the high-temperature reaction oil gas.

The application discloses a breath methane and hydrogen synchronous detection method and system based on an improved gas sensor, and relates to the biomedical detection field.The method comprises the following steps: using the improved gas sensor to synchronously collect a breath flow signal and a sensor original electric signal at a set sampling rate; identifying a breath alveolar air plateau according to the breath flow signal, and intercepting a corresponding sensor original signal segment; performing filter denoising and baseline correction preprocessing on the sensor original signal segment of the plateau; based on the hydrogen and methane response time difference amplified by the gas diffusion delay structure of the improved gas sensor, extracting a first characteristic quantity related to the hydrogen concentration and a second characteristic quantity related to the methane concentration from the preprocessed plateau signal segment; and calculating and outputting the hydrogen concentration value and the methane concentration value according to the first characteristic quantity and the second characteristic quantity.The application can synchronously detect breath methane and hydrogen based on the sensor diffusion delay structure, and has the advantages of low cost, portability and high detection reliability.

The application discloses an online analysis system based on hydrogen and methane breath monitoring, and belongs to the technical field of breath monitoring. The online analysis system comprises a zero point calibration module, a raw signal acquisition module, a data processing module, a signal processing module, a signal compensation module, a secondary zero point calibration module and a baseline correction module. The zero point calibration module is used for acquiring a first collection environment background carbon dioxide concentration. The raw signal acquisition module is used for acquiring a breath sample. The data processing module is used for processing raw signal data flow. The signal processing module is used for outputting a filtered concentration signal. The signal compensation module is used for obtaining compensated hydrogen and methane concentrations. The secondary zero point calibration module is used for acquiring a reference carbon dioxide zero point. The baseline correction module is used for baseline correction. The model establishment module is used for outputting a trend judgment. The online hydrogen and methane breath analysis system reaches the technical effect of maintaining high concentration accuracy under the conditions of breath volume fluctuation and sensor nonlinearity, and solves the measurement deviation problem caused by volume change, nonlinear response and carbon dioxide zero point drift in the prior art.

The invention relates to the technical field of biomass carbonization, in particular to automatic continuous biomass carbonization equipment. The method comprises the steps that firstly, biomass is put into a first rotary furnace, and then the biomass in the first rotary furnace is preheated; the biomass subjected to moisture removal enters a second rotary kiln, the temperature of the first rotary kiln is controlled to be 150-220 DEG C, and the time is controlled to be 30-60 minutes; the fossil combustible gas is introduced into a second rotary furnace for combustion so as to carbonize the biomass; the carbonization temperature is controlled between 300 DEG C and 600 DEG C; biomass can generate a large amount of organic combustible gas such as methane and hydrogen in the carbonization process, after the organic combustible gas is introduced into the secondary combustion chamber to be combusted, the generated temperature can reach 1300 DEG C, released heat energy is mixed with cold air and then adjusted to the needed temperature, the first rotary furnace and the second rotary furnace are heated again, and the temperature of the first rotary furnace and the temperature of the second rotary furnace are adjusted to the needed temperature. Meanwhile, after sufficient combustion, tail gas meets the environment-friendly requirement; energy recycling is achieved, and the yield is increased.

A process for the manufacture of an alcohol selected from n-butanol and 2-ethylhexanol, comprises providing a gasifier feedstock; gasifying the gasifier feedstock by partial oxidation to form a raw product gas stream comprising a plurality of gases comprising methane, hydrogen and carbon monoxide; and recovering syngas from the raw product gas stream. Further, the process comprises obtaining propylene from renewably-sourced ethanol by subjecting renewably-sourced ethanol to dehydration to produce a renewably-sourced ethylene stream; and subjecting the renewably-sourced ethylene stream to an olefin-interconversion. The propylene obtained from renewably-sourced ethanol is mixed with propylene not obtained from renewably-sourced ethanol to form mixed propylene; and the mixed propylene is subjected to a sequence of chemical conversions to obtain n-butanol or 2-ethylhexanol. The process can be easily integrated into an existing production site in which one or more chemicals of interest are manufactured based on a fossil feedstock, allowing for fossil-based propylene to be partially substituted by renewably-sourced propylene.

This invention discloses a thin-film composite membrane and process for the separation of carbon dioxide from non-hydrophilic gases such as methane, hydrogen, and nitrogen. The thin-film composite membrane has a gas-separation layer and a nonporous high-diffusion-rate layer, and has carbon dioxide to non-hydrophilic gas selectivity that is greater than the intrinsic selectivity of the gas-separation layer alone.

The waste heat recycling system comprises a calcining furnace and a pretreatment assembly, the top of the calcining furnace is communicated with a volatile component conveying pipe, the other end of the volatile component conveying pipe is connected with the pretreatment assembly, calcining raw materials in the calcining furnace are calcined to generate a large amount of high-temperature flue gas, and the high-temperature flue gas is used for recycling waste heat in the calcining furnace. The high-temperature flue gas mainly comprises volatile components such as methane, hydrogen and tar, the high-temperature flue gas is conveyed into the pretreatment assembly through the volatile component conveying pipe to be recycled, the high-temperature volatile components are changed into a heat source of the pretreatment procedure from waste, closed-loop gradient utilization of energy in the production system is achieved, and the heat utilization efficiency is high.

The invention relates to the technical field of ethylene devices, in particular to a method and system for recycling a high-purity hydrogen product. The method comprises the following steps: carrying out multi-stage heat exchange on a cracking gas raw material, and then carrying out pressure swing adsorption to obtain a hydrogen product; the pressure of the pyrolysis gas is 3-4 MPa, and the pyrolysis gas comprises the following components: 40-95 mol% of hydrogen, less than or equal to 0.1 mol% of ethylene and the balance of methane; the multi-stage heat exchange comprises multi-stage heat exchange by using low-pressure tail gas and high-pressure tail gas as heat exchange media; the low-pressure tail gas and the high-pressure tail gas are hydrogen-methane mixtures and contain crude hydrogen-methane cracked gas raw materials before demethanization; the purity of the final hydrogen product is greater than 99.9 mol%; according to the method, the cracked gas of crude hydrogen methane before demethanation can be directly used as a raw material, the cooling capacity after multi-stage heat exchange is recycled, and in addition, a hydrogen product with the purity of 99.9 mpl% or above can be obtained in cooperation with the pressure and components of the cracked gas.

Apparatus for separation of a gaseous mixture containing CO2, hydrogen and water includes a compressor for compressing the gaseous mixture to a first pressure, a temperature swing adsorption unit for drying the compressed gas mixture comprising at least two adsorbent beds, a separation unit for separation of the dry and compressed gaseous mixture to produce at least two streams, being a liquid enriched in CO2 and depleted in at least one of methane, hydrogen or carbon monoxide as compared with the gaseous mixture and a first residual gas depleted in CO2 and enriched in at least one of methane, hydrogen or carbon monoxide as compared with the gaseous mixture, a pressure swing adsorption unit for separation of the first residual gas depleted in CO2 by adsorption in order to produce at least one gas richer in CO2 than the first residual gas and at least one gas depleted in CO2 and enriched in at least one of methane, hydrogen or carbon monoxide as compared to the first residual gas, a conduit for sending to one of said adsorbent beds a regeneration gas which is at least a part of at least one gas depleted in CO2.

The application discloses a biomimetic DNA double helix structure methane hydrogen mixer, relates to the technical field of hydrogen energy utilization, and can make methane and hydrogen more fully contact and mix in the mixer through a DNA double helix structure formed by two spiral columns and a guide plate, so that the mixing uniformity is improved. Meanwhile, the biomimetic DNA double helix structure can optimize the fluid channel and flow velocity distribution in the mixing element, so that the fluid resistance is reduced, the energy loss in the mixing process is reduced, and the energy efficiency of the whole system is improved.

The invention relates to the technical field of refraction film preparation, and mainly relates to a carbon-germanium co-sputtering refraction film and a preparation method thereof. The preparation method of the carbon-germanium co-sputtered refraction film comprises the following steps: configuring a substrate for pretreatment; placing the substrate in a multi-target magnetron sputtering device, vacuumizing, introducing argon, and activating the substrate by plasma; placing a graphite target and a germanium target, keeping introducing argon, newly introducing methane and hydrogen, carrying out ion beam reaction to co-sputter the graphite target and the germanium target, and stopping sputtering after a refraction film is deposited. Carbon-germanium double-target co-sputtering is matched with introduction of methane and hydrogen, the release stability of carbon-germanium atoms is guaranteed through a solid-state target material, activated carbon groups are supplemented through methane, methane dissociation is promoted through hydrogen, the carbon-germanium atomic ratio of a film layer can be preliminarily regulated and controlled, refractive index control of deposition film forming can be adjusted, and meanwhile through co-sputtering and reaction gas of methane, the film forming efficiency is improved. The composition uniformity of the film layer is ensured, and the compact degree and the refraction performance of the film layer are improved.