133 results about "Hydrogen adsorption" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

The present application relates to the technical field of catalysts and relates to a non-noble metal cathode hydrogen evolution catalyst for PEM water electrolysis and a use thereof. The present application provides a method for preparing a cathode hydrogen evolution catalyst. A nickel-molybdenum heteropoly acid having a specific structure is generated in situ on the surface of a porous carbon material carrier, and is used as a hydrogen evolution catalyst active component precursor, and an in-situ generated nickel-containing molybdenum sulfide active component is subjected to sulfidation treatment to prepare a non-noble-metal-supported cathode hydrogen evolution catalyst, wherein the in-situ generated nickel-containing molybdenum sulfide active component has a hydrogen adsorption free energy similar to that of Pt and catalytic hydrogen evolution activity, the dispersity is good, and the number of active sites is large, thereby reducing the costs of the catalyst; in addition, during the sulfidation treatment of the nickel-molybdenum heteropoly acid, nitrogen or phosphorus atoms in the carrier can be doped into the lattice of molybdenum disulfide, thereby reducing the hydrogen evolution Gibbs free energy of sulfur atoms on an MoS2 crystal basal surface, and more active sites are formed on a sulfur edge and a molybdenum edge, facilitating a hydrogen evolution reaction.

The invention belongs to the technical field of hydrogen adsorption, leakage and sequestration simulation experiments, and particularly relates to a system and a method for detecting the hydrogen adsorption, leakage and sequestration capacities of soil. The system comprises a simulation bin system, a hydrogen inlet system, a helium inlet system, a water inlet system and a gas outlet system, the simulation bin system is divided into an air simulation bin, a sample bin and a gas source bin by a pressurizing device and a supporting device, and a water vapor heating disc is arranged in the gas source bin. The hydrogen inlet system is in valve control connection with the gas source bin, the helium inlet system is in valve control connection with the air simulation bin and the gas source bin, the water inlet system is in valve control connection with the steam heating disc, and the gas outlet system is in valve control connection with the air simulation bin and the gas source bin. The method comprises eight steps, and the processes of adsorption, leakage and sealing storage of hydrogen in soil when the hydrogen leaks upwards under different air temperatures and air pressures in the nature are simulated. Therefore, the system and the method can provide theoretical and technical guidance for earth surface exploration of natural hydrogen.

The disclosure provides a method for improving hydrogen adsorption performance of a covalent organic framework material, including the following steps: providing a covalent organic framework material including an imine bond; and placing the covalent organic framework material in hydrochloric acid vapor for protonation. The disclosure further provides a protonated covalent organic framework material, and use thereof as a hydrogen storage medium.

The invention relates to the technical field of hydrogen fluoride adsorption, and particularly discloses a hydrogen fluoride adsorption tower which comprises a tower body, a gas inlet pipeline arranged on the lower section of the tower body, a gas outlet pipeline arranged on the upper section of the tower body, a plurality of layers of adsorption beds arranged in the tower body in the vertical direction, and adsorbents arranged on the adsorption beds. The material changing mechanism comprises a waste material pipe rotationally arranged in the tower body, a driving part I for driving the waste material pipe to rotate, a plurality of inverted conical funnels respectively arranged below the plurality of layers of adsorption beds and a plurality of trapping boxes arranged on the waste material pipe, and the waste material pipe penetrates through all the adsorption beds; a plurality of spiral scrapers for driving the adsorbent to radially flow are arranged on the waste pipe, the upper end of the inverted-cone-shaped funnel exceeds the outer edge of the adsorption bed, an annular air jet hole is formed in an outlet in the bottom of the inverted-cone-shaped funnel, and the trapping boxes surround the waste pipe in an annular array; the device has the beneficial effects that saturated aluminum oxide is separated in time, so that the adsorption effect of the aluminum oxide is improved.

The invention belongs to the technical field of anion exchange membrane fuel cells, and discloses a high-stability ruthenium-based hydroxide electrocatalyst used as an anode of an anion exchange membrane fuel cell and a preparation method of the high-stability ruthenium-based hydroxide electrocatalyst. The catalyst is prepared by taking ruthenium as a unique active component, fullerene (C60) as a carbon substrate and polydopamine (PDA) as an additive through argon heat treatment. The preparation method disclosed by the invention is simple and easy to implement, and through the design scheme that C60 with high electron affinity is used as a carrier, the electronic structure of a ruthenium active site is effectively adjusted, and excessive adsorption of a ruthenium-based catalyst to hydroxyl species in a hydrogen oxidation reaction (HOR) process is weakened, so that the ruthenium reaction active site is greatly reserved for hydrogen adsorption, and the hydrogen adsorption efficiency is improved. Therefore, the stability of ruthenium-based electro-catalysis in hydrogen oxidation reaction can be greatly improved.

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 application provides a method, an apparatus and a device for evaluating a dynamic diffusion of natural hydrogen in rock pores. The method includes: performing, at a target pressure and a target temperature, a simulation calculation of a natural hydrogen adsorption based on a pre-constructed pore model of a rock to be evaluated, and determining an average number of hydrogen molecules adsorbed in the rock pores when the natural hydrogen is saturated at the target pressure and the target temperature; determining a natural hydrogen content, based on lithologic parameters, the average number of hydrogen molecules, the target pressure and the target temperature; adding one or more preset gases to the pre-constructed pore model, determining a loss content of the natural hydrogen, and determining a diffusion coefficient of the natural hydrogen; determining a diffusion evaluation parameter, based on the natural hydrogen content, the loss content and the diffusion coefficient.

The invention discloses a liquid hydrogen filling device and method, and belongs to the technical field of liquid hydrogen. The device comprises a liquid hydrogen supply tank, a liquid hydrogen receiving tank, a filling pipeline and a pressurizing pipeline, the bottom of the liquid hydrogen supply tank is communicated with the bottom of the liquid hydrogen receiving tank through a filling pipeline; evaporation ends of the low-temperature heat pipes are positioned in the hydrogen adsorption module, and condensation ends of the low-temperature heat pipes are positioned in the metal cavity and are provided with metal fins; the head end of the pressurizing pipeline is divided into two branches, the first branch is connected with the filling pipeline, the first pressurizing valve, the intermittent heater and the metal cavity, the second branch is connected with the top of the liquid hydrogen receiving tank and the second pressurizing valve, and the two branches are combined and then connected with the liquid hydrogen supply tank. The pressure in the receiving tank in the filling process is reduced through the hydrogen adsorption module, the filling success rate is increased, meanwhile, liquid hydrogen is used for conducting non-contact cooling on the hydrogen adsorption module, vaporized hydrogen obtained after cooling serves as pressurized gas of the supply tank, the pressure in the hydrogen adsorption module is kept stable, and a certain supercooling degree is provided for operation of the liquid hydrogen pump.

The invention provides a hollow pipe fitting forming device and method. The hollow pipe fitting forming device comprises a heating mechanism, a bulging quenching mold and an air source mechanism. The heating mechanism comprises a roller hearth furnace provided with a conveying roller way, a furnace body is sequentially provided with a feeding isolation chamber, a heating chamber and a discharging isolation chamber in the length direction, all the chambers are isolated from one another and communicated with a protective atmosphere system, and the chambers are used for introducing dry air or inert gas into the furnace body and maintaining the dew point temperature below-15 DEG C; hydrogen adsorption on the surface of the hollow pipe blank is effectively inhibited, and the hydrogen embrittlement risk is reduced. After a pipe blank is heated at a high temperature, austenitizing of a material structure is achieved, then the pipe blank is rapidly transferred to a bulging quenching die, gas expansion deformation occurs in a die cavity under the action of set air pressure, the hollow pipe fitting is formed by attaching the die wall, meanwhile, the hollow pipe fitting attached to the die cavity is synchronously cooled through a cooling assembly in the die, and quenching treatment is achieved. The material structure is converted into martensite, and the mechanical property of a formed part is improved.

The invention provides a method and a device for testing hydrogen doping of a buried steel pipe under a cathode protection condition. The method and the device solve the technical problem that an internal hydrogen permeation-external hydrogen adsorption synergistic effect mechanism faced by a buried pipeline cannot be reflected in an existing test. The method comprises the following steps: establishing a dual test environment under a cathode protection condition, forming a control group and an experimental group of a corrosion test piece to be tested, deploying the control group in a single soil environment, and deploying the experimental group in internal and external hydrogen environments; the power-on potential and the power-off potential are continuously monitored in the dual test process; quantitative comparison of key parameters of the control group and the experimental group is formed according to the double test periods; and constructing a multiple regression model according to the key parameters in combination with potential correction data to quantify the correlation between the corrosion rate and the hydrogen embrittlement sensitivity. The double-environment coupling effect in the actual operation of the pipeline is synchronously simulated, and the diffusion path difference of hydrogen atoms in metal lattices and the influence of double-environment superposition on the corrosion rate are more truly reflected.

The invention relates to an electrode and a preparation method and application thereof, and belongs to the field of water electrolysis industry. The preparation method of the electrode comprises the following steps: providing an electroplating base material; nickel is plated on the surface of the electroplating base material to form a nickel plating layer, and a pre-plated base material is obtained; the pre-plated base material is added into a first electroplating solution to be electroplated to form an alloy plating layer, the electrode is obtained, and the first electroplating solution comprises a NiSO4 solution with the concentration being 0.5 mol / L to 1 mol / L, a Na2MoO4 solution with the concentration being 0.01 mol / L to 0.05 mol / L and a CuSO4 solution with the concentration being 0.1 mol / L to 0.5 mol / L. Compared with nickel or common nickel alloy, the prepared electrode has the advantages that the hydrogen adsorption performance is reduced, the overpotential is effectively reduced, and the water electrolysis performance is close to that of precious metal.

A method and apparatus for regenerative hydrogen separation at high temperatures for production of pure hydrogen gas. Pure metals and metallic alloys are used at high temperatures to maximize the catalytic effect for hydrogen dissociation, hydrogen diffusion and hydrogen sorption capacity. Metallic materials are used that can selectively sorb hydrogen at high temperatures. These materials are integrated into equipment designs and process configurations to process a stream of hot mixed process gases to produce a stream of pure hydrogen product at the desired system temperature. The invention can be used to enhance the performance of existing plants such as steam methane reforming applications by increasing the conversion to hydrogen, eliminating or reducing the number of shift converters, providing pure hydrogen product, and enhancing the overall energy efficiency. In some embodiments, the hydrogen sorption system is built inside a hydrogen production reactor, enhancing the chemical equilibrium inside the reactor, to achieve higher conversion and hydrogen yields.

The utility model discloses a pressure equalizing adjusting device of a hydrogen production adsorption tower, and relates to the technical field of hydrogen production adsorption towers. The pressure equalizing adjusting device of the hydrogen production adsorption tower comprises a hollow shell with an opening in the rear end, a controller is fixedly connected to the lower end in the shell, a display screen is fixedly connected to the interior of the upper end of the front surface of the shell, and two three-way pipelines are arranged at the upper end in the shell; the left end and the right end of the three-way pipeline are fixedly connected with the outer wall of the shell, an electromagnetic valve is fixedly connected to the horizontal section of the three-way pipeline and located on the right side of the turning position, and an electromagnetic proportional valve is fixedly connected to the right end of the turning section of the three-way pipeline. And the controller is electrically connected with the display screen, the electromagnetic valve, the electromagnetic proportional valve and the pressure sensor in the adsorption tower. According to the pressure-equalizing adjusting device for the hydrogen production adsorption tower, plc control equipment and a pipeline control system are integrated together, and the internal pressure can be adjusted and controlled only through pipeline connection.

The utility model discloses a device for automatically adjusting the gas treatment amount of an adsorption tower on line, relates to the technical field of polycrystalline silicon production, and mainly aims to monitor the content of Cl <-> in hydrogen treated by the adsorption tower on line and realize automatic adjustment of an outlet adjusting valve of the hydrogen adsorption tower. According to the main technical scheme, the device for automatically adjusting the gas treatment amount of the adsorption tower on line comprises a reaction chamber, a gas inlet pipe and an ion chromatograph, the upper end of one side of the reaction chamber is connected to a discharge pipe, a filler layer is arranged in the reaction chamber, and the liquid level in the reaction chamber is located above the filler layer; one end of the gas inlet pipe is connected to the adsorption tower outlet pipe, the other end of the gas inlet pipe penetrates through the top wall of the other side of the reaction chamber and is connected to the bubbling pipe, the bubbling pipe is located below the filler layer, and a plurality of through holes are uniformly distributed in the pipe wall of the bubbling pipe; the detection end of the ion chromatograph extends into the liquid above the filler layer, and the ion chromatograph and the adsorption tower outlet regulating valve are in interlocking control.

The invention provides a hydrogen adsorption and storage composite material for a high-hygrothermal environment of a coal mine as well as a preparation method and application of the hydrogen adsorption and storage composite material, and relates to a high-efficiency hydrogen adsorption and storage composite material. The method comprises the following steps: activating activated carbon to obtain pretreated activated carbon; the method comprises the following steps: soaking zeolite in a NaCl solution, and drying to obtain pretreated zeolite; mixing ZIF-8, the pretreated activated carbon and zeolite, and adding the mixture into a ball mill for ball milling to obtain composite powder; mixing and stirring the obtained composite powder and a binder, curing into a sphere by adopting a spray drying method, and drying and heating to form a porous structure, thereby obtaining the hydrogen adsorption and storage composite material for the high-humidity-heat environment of the coal mine. According to the MOFs composite material disclosed by the invention, efficient separation and storage of hydrogen in a complex gas source are realized by utilizing a hierarchical pore structure and moisture-resistant stability of the material, relatively high hydrogen adsorption capacity and relatively high adsorption rate can be kept in a high-humidity-heat environment, and the MOFs composite material is suitable for high-risk environments such as a coal mine and the like.

The invention discloses a preparation method and application of a selective hydrogen adsorption type magnesium base material in a non-pure hydrogen atmosphere, and the preparation method comprises the following steps: carrying out thinning treatment on Ti3C2 MXene powder to obtain few-layer Ti3C2; the method comprises the following steps: weighing a MgH2 powder sample, pretreating, and then carrying out atomic layer deposition to obtain a sample subjected to atomic layer deposition coating treatment; carrying out ball milling treatment on the sample subjected to atomic layer deposition coating treatment and few-layer Ti3C2, so as to obtain MgH2-ZrTi; mgH2-ZrTi powder is weighed and pretreated, amorphous Al2O3 of 5 nm to 20 nm is deposited after pretreatment, and the selective hydrogen adsorption type magnesium-based material is obtained. The method disclosed by the invention is simple, efficient and easy to operate, is beneficial to large-scale production and application, and also fills the blank of air stability and selective hydrogen absorption of the hydrogen storage material.

This invention provides a method for preparing nano-sized magnesium hydride, comprising the steps of preparing magnesium nanoparticles by gas-phase condensation, MXene-confined catalytic hydrogenation, and atomic layer deposition to construct a composite coating layer. This invention achieves the preparation of ultrafine magnesium nanoparticles through gas-phase condensation; simultaneously utilizing the three-dimensional wrinkled structure Ti3C2T x MXene not only effectively prevents the migration and aggregation of nanoparticles during cycling through physical confinement, but also lowers the energy barrier of hydrogen adsorption and desorption reactions through in-situ generated highly active catalytic phases (such as TiH2), achieving a dual synergistic effect of confinement and catalysis. A titanium dioxide-amorphous carbon composite coating layer is constructed using atomic layer deposition (ALD) technology, which, in conjunction with the MXene confinement framework, provides a dual stabilization mechanism for nano-magnesium hydride. This invention organically combines gas-phase condensation, MXene-confined hydrogenation, and ALD coating, resulting in a product with an initial dehydrogenation temperature below 100°C and a hydrogen storage capacity retention rate exceeding 95% after 3000 hydrogen adsorption and desorption cycles, demonstrating excellent comprehensive performance.

The utility model discloses an adsorption bed with an online monitoring function, and belongs to the technical field of hydrogen adsorption and impurity removal in polycrystalline silicon production, the adsorption bed is used for hydrogen adsorption and impurity removal in polycrystalline silicon production, the adsorption bed comprises a main body, the main body comprises a shell, an adsorption mechanism is mounted on the inner wall of the shell, the adsorption mechanism comprises an adsorption bed body, and the adsorption bed body is arranged on the adsorption bed body. The surface of the adsorption bed body is fixedly connected with the inner wall of the shell, a monitoring mechanism is installed on the inner wall of the adsorption bed body and comprises a connecting plate, the surface of the connecting plate is attached to the surface of the adsorption bed body, a connecting rod is installed in the connecting plate, a connecting groove is formed in the lower surface of the adsorption bed body, and the connecting rod is connected with the connecting groove. An elastic block is fixedly connected to the inner wall of the connecting groove, the lower surface of the elastic block is attached to the upper surface of a connecting rod, and a first protruding block is fixedly connected to the surface of the connecting rod. The internal activated carbon net can be easily detached for replacement, and the practicability of the device is improved.

A method for enhancing hydrogen storage through the hierarchical thermal sequence construction of carbon-based fuel micro / nano structures belongs to the field of carbon-based hydrogen storage material preparation technology. The purpose of this invention is to address the difficulty in achieving precise control over the pore structure and oxygen-containing functional groups of carbon-based materials using existing technologies, thus hindering the realization of their hydrogen storage potential at low and room temperatures. This method utilizes potassium-containing compounds to activate and prepare a carbon substrate with a specific physicochemical structure. Then, it employs low-temperature H2O to enhance the generation of micro / nano channels. Finally, it uses low-temperature air oxidation to construct a hierarchical thermal sequence micro / nano structure with oxygen-containing functional groups. On the one hand, the synergistic effect of oxygen-containing groups and micro / nano pores significantly improves the hydrogen adsorption capacity of carbon-based fuels. On the other hand, the use of H2O and air post-treatment greatly reduces the amount of chemical activation reagents required, making the overall technology more environmentally friendly and cleaner. Simultaneously, it achieves quantitative control over the micro-meso-hierarchical pore structure and ultra-micropore sequence / oxygen content, efficiently utilizing carbon-based fuels and providing a new approach for the preparation of hydrogen storage materials.

The utility model relates to the technical field of chemical engineering, and discloses a low-pressure separated gas recovery system of a coal tar hydrogenation device for chemical engineering. The system comprises a liquid-phase hydrogenation cold low-pressure separation tank, a hydrofining cold low-pressure separation tank, a hydrofining cold high-pressure separation tank, a low-pressure separation gas desulfurization tower and the like. The upper part of the desulfurization tower is connected with a desulfurization barren liquor solvent pump, and the bottom of the desulfurization tower is connected with a desulfurization pregnant solution desorption regeneration system and is connected with the desulfurization barren liquor solvent pump and the desulfurization pregnant solution desorption regeneration system. The top of the desulfurization tower is connected with a low-pressure gas vapor-liquid separator, and is subsequently connected with a series of equipment such as a low-pressure gas hydrogen extraction adsorption tower. According to the system, sulfides in low-pressure gas are removed by using a desulfurization barren solution, and a desulfurization pregnant solution is subjected to desorption regeneration and then is recycled. The desulfurized low-pressure separated gas is subjected to the steps of gas-liquid separation, hydrogen extraction adsorption and the like, and the purity of gas hydrogen at the outlet of the top of the hydrogen extraction adsorption tower can be controlled to be greater than 95%, so that the effective utilization of energy is realized, the coal tar hydrogenation and hydrogen cost is reduced, the energy waste, environmental pollution and potential safety hazards are reduced, the ecological environment is improved, and the production safety is improved.

The application relates to the technical field of hydrogen storage performance calculation and evaluation, and discloses a solid hydrogen storage material hydrogen storage performance calculation and evaluation method and system, which comprises the following steps: using a functional density theory and a molecular dynamics method, constructing a material microcosmic model, and analyzing and designing the mechanical properties, electronic distribution, heat conduction performance and thermal stability of the material itself; calculating the adsorption state and adsorption energy of hydrogen molecules on the hydrogen storage material, and the hydrogen adsorption amount of the material under different pressures and temperatures, so as to calculate the hydrogen adsorption performance of the newly designed hydrogen storage material; and drawing a hydrogen adsorption kinetics curve of the solid hydrogen storage material, so as to calculate and evaluate the hydrogen storage kinetics performance of the material. The system comprises a performance analysis module, a performance calculation module and a performance evaluation module. The application can comprehensively improve the research and development efficiency and hydrogen storage performance of the solid hydrogen storage material in theory and actual application. Each step provides important theoretical support and data basis when solving different technical challenges.

The utility model relates to the field of hydrogen storage bottles, in particular to an adsorption type low-temperature hydrogen storage bottle. The hydrogen storage bottle comprises a heat insulation shell, a hydrogen adsorption mechanism, a filter, a gas bottle valve and a safety valve, the filter is installed on the gas bottle valve and arranged in the heat insulation shell, the hydrogen adsorption mechanism is arranged in the heat insulation shell, the safety valve is installed on the gas bottle valve, the hydrogen adsorption mechanism is made of a carbon-based material, and a plurality of nanometer micropores are distributed in the hydrogen adsorption mechanism. According to the hydrogen storage device, high-density hydrogen storage is realized in a relatively low-temperature and pressure environment through the strong adsorption capacity of the microporous hydrogen adsorption mechanism to hydrogen molecules. And the hydrogen is filtered through the filter.

The invention belongs to the technical field of electro-catalysis and new energy chemical industry, and relates to a composite catalyst, a preparation method thereof and application of the composite catalyst in ammonia production through electrochemical nitrate reduction. The catalyst comprises a substrate and CoCu2O nanoclusters located on the surface of the substrate, the substrate is made of a conductive metal organic framework material containing Co and Cu, and an organic ligand in the conductive metal organic framework is HHTP; non-coordinated hydroxyl exists in the substrate; co in the CoCu2O nanocluster exists in a Cu2O crystal lattice in a doping manner, and at least a (111) crystal face is exposed. CoCu2O in the catalyst serves as an efficient water dissociation and hydrogen adsorption (Had) center, and a reaction hydrogen source is continuously supplied; a large number of non-coordinated hydroxyl groups are exposed on the partially reduced substrate, a hydrogen bond network is constructed to stabilize NO3, NO2 and other key intermediates, and the energy barrier of NO3 <-> adsorption and NO hydrogenation is reduced, so that the ammonia production catalytic activity and selectivity of the NO3RR are improved, and the service life of the NO3RR is prolonged.

A hydrogen gas storage tank includes a body including a metallic bulk region and one or more protective layers adjacent to the bulk region. One or more of these protective layers comprise a number of graphyne molecules such that the one or more protective layers are configured to lower hydrogen adsorption into the bulk region when compared to a bulk region with protective layers free from graphyne.

The invention provides an electrocatalyst and a preparation method thereof, an electrode, an electrolysis device and application. The electrocatalyst comprises a carbon-based substrate and a coating layer loaded on at least part of the surface of the carbon-based substrate, wherein the carbon-based substrate has a three-dimensional porous structure; the coating layer comprises metal nickel and trinickel disulfide; the porous structure of the carbon-based substrate is utilized to provide a larger specific surface area so as to increase the coating amount and provide more catalytic active sites, and through the synergistic effect of the carbon-based substrate and metal nickel and trinickel disulfide loaded on the surface of the carbon-based substrate, an area with negative electricity locally can be formed, more active sites are provided for hydrogen adsorption, and the hydrogen adsorption efficiency is improved. The catalytic activity can be greatly improved, the hydrogen evolution overpotential is reduced, and the stability of the electrocatalyst is improved.

The invention provides an adsorbent regeneration method of a PSA hydrogen production adsorption tower, and belongs to the technical field of adsorbent regeneration, and the adsorbent regeneration method comprises the following steps: S1, slowly heating and preliminarily preheating nitrogen, and simultaneously introducing the nitrogen into the adsorption tower; s2, heating the nitrogen, continuously introducing the nitrogen into the adsorption tower, further desorbing impurities in the adsorbent, and stopping heating the nitrogen until the temperature at a nitrogen outlet of the adsorption tower reaches the lowest and rises; s3, continuously carrying out cold blowing cooling on the adsorption tower by using nitrogen; s4, after cooling is completed, nitrogen containing a small amount of oxygen is introduced into the adsorption tower, light oxidation activation is conducted on the adsorbent, and regeneration is completed. Hot nitrogen uniformly penetrates through an adsorbent layer, contacts with and desorbs impurities, then is matched with condensation-gasification circulation of low-pressure steam to further dredge micropores of the adsorbent, and is supplemented with a small amount of oxygen to oxidize impurities on the surface of the adsorbent, recover the activity of the adsorbent and effectively regenerate the adsorbent, so that the adsorption performance of the adsorbent is 90% or above of the initial performance.

The invention relates to a safe scavenger for inflammable and virulent hydrogen sulfide and a preparation method thereof, and belongs to the technical field of hydrogen sulfide adsorption materials. The preparation method comprises the following steps: by taking a carbon nanotube as a matrix, growing iron oxide nanoparticles on the carbon nanotube in situ, so that the dispersion and distribution uniformity of the iron oxide nanoparticles can be improved, and then carrying out Michael addition reaction on a vinyl group on the vinyl modified iron oxide loaded carbon nanotube and a secondary amino group in a hexahydro-s-triazine grafted compound, so as to obtain the composite material. Amine groups containing a large number of hexahydrotriazine groups, piperazine groups and the like can be further cross-linked and coated on the surface of the scavenger, and a hexahydrotriazine-piperazine cross-linked network polymer is formed on the surface of the scavenger; the tubular carbon nanotubes, the ferric oxide particles loaded on the surfaces of the tubular carbon nanotubes and the piperazine-hexahydro-s-triazine cross-linked network-shaped polymer coated on the surface of the hydrogen sulfide scavenger work together, so that the removal effect of hydrogen sulfide in a gas phase and a water phase is effectively improved.

The utility model discloses a hydrogen separation and recovery device, which solves the problem that hydrogen is not easy to separate when hydrogen and other harmless gases exist in mixed gas, and comprises a base, a hydrogen separation component is mounted at the top end of the base and comprises a fixed cylinder fixedly mounted at the top end of the base, and the fixed cylinder is fixedly mounted at the top end of the base. One end of the fixed cylinder is opened, a separation unit is installed in the fixed cylinder and comprises an end plate located on the side, close to the opening, of the fixed cylinder, an inner cylinder is installed on the side, close to the fixed cylinder, of the end plate, the outer diameter of the inner cylinder is smaller than the inner diameter of the fixed cylinder, an inner cavity is formed in the inner cylinder, and a separation cavity is formed in the inner cylinder; the separation cavity is located on the outer side of the inner cavity, the separation cavity is far away from the end plate and penetrates to the outer side of the inner cylinder, and a hydrogen adsorption material is installed in the separation cavity; according to the utility model, the hydrogen in the mixed gas is adsorbed through the hydrogen adsorption material in the separation cavity.