22 results about "Hydrogen molecule" patented technology

Metal-based hydrogen storage fibers capable of selectively absorbing and desorbing / releasing hydrogen gas, and hydrogen storage vessels comprising the fibers, wherein the fibers are preferably arranged in a fabric. The fabric is a porous structure with a large surface area, which is well suited for hydrogen storage and transport. A hydrogen storage system is provided with attractive properties. Hydrogen storage in metal hydride fibers provides a compact and safe method of hydrogen storage, wherein hydrogen molecules in the gas phase can be adsorbed on the surface of the fibers, thereby forming metal hydrides, or dissociated into individual hydrogen atoms, which can further diffuse into the bulk of the metal hydride fiber and occupy sites in the metal hydride fiber matrix.

The application of prediction method for diffusion behavior of underground hydrogen in pore scale of water-containing clay mineral belongs to the technical field of underground hydrogen energy storage and unconventional gas migration prediction, and the key point is to fill water molecules and salt ions into the pores according to the target water saturation and salinity; the initial model of the water-containing clay mineral pores is pre-equilibrated by the molecular dynamics method; hydrogen molecules are filled under the given temperature and pressure conditions by the grand canonical Monte Carlo method, and the hydrogen pressure is corrected by the SRK-EOS state equation; the hydrogen diffusion simulation is carried out by the molecular dynamics method with temperature and fugacity as input parameters, the mean square displacement of hydrogen in the pores is calculated, and the self-diffusion coefficient is obtained; the application can quantitatively characterize the diffusion rate change rule of hydrogen in the clay pores under different water film thickness, salinity and temperature and pressure conditions, and reveal the diffusion inflection point, diffusion inhibition stage and migration restriction mechanism caused by the water film or water bridge structure.

This invention provides a multi-scale neighborhood synergistic catalyst, its preparation method, and its applications. The method uses nitrogen-doped carbon nanotubes (NCNTs) as a structural platform, achieving precise construction of Al diatomic sites through vapor-phase migration, trapping, and reduction fixation of volatile metal precursors. Furthermore, it combines secondary vapor-phase deposition to drive the surface deposition and nucleation of metal-containing Y species, resulting in in-situ growth into metal nanoclusters to obtain Al2-Y. NC / NCNT catalyst. In this catalyst, Al species are atomically dispersed and exhibit coordination unsaturation, while metallic Y is anchored to its neighboring interface in the form of nanoclusters. Both maintain a stable nearest-neighbor structure under the confinement and anchoring effect of carbon nanotube doping sites. The Al2 sites can regulate the selective adsorption configuration and electronic state of reaction intermediates, while the Y nanoclusters provide efficient hydrogen molecule activation and overflow hydrogen supply channels. Together, they lower the energy barrier of key hydrogenation steps and suppress excessive hydrogenation side reactions. This invention features mild conditions, a simple process, and exhibits excellent hydrogenation activity and selectivity.

A reactor is configured to electrochemically convert hydrogen sulfide to produce hydrogen. The reactor includes a first shell, a second shell, a hydrogen-permeable electrode, and a check valve. The first shell defines a first chamber. The first shell defines a first inlet for water, a second inlet for hydrogen sulfide, and a first outlet for hydrogen sulfide. The second shell defines a second chamber isolated from the first chamber. The second chamber stores hydrogen molecules. The hydrogen-permeable electrode is at least partially disposed within the first chamber. The hydrogen-permeable electrode is permeable to hydrogen atoms originating from the hydrogen sulfide. The check valve allows flow of hydrogen molecules, formed from the hydrogen atoms that have permeated into the hydrogen-permeable electrode, into the second chamber while preventing flow of hydrogen molecules back out from the second chamber through the check valve.

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

The present disclosure provides a hydrogen sensor, comprising: a substrate; a sensing film disposed on a first surface of the substrate, including a catalyst for decomposing hydrogen molecules and tungsten oxide; a pair of electrodes disposed on the first surface of the substrate in contact with the sensing film; and an IC tag connected to the pair of electrodes, the IC tag including: an IC chip; an antenna connected to the IC chip; and a pair of sensor terminals connected to the IC chip and to the pair of electrodes, respectively, the IC chip being an open-circuit short-circuit type that determines a high resistance state when a resistance value between the sensor terminals is above a first threshold resistance value, and determines a low resistance state when the resistance value between the sensor terminals is below a second threshold resistance value that is less than the first threshold resistance value, the resistance value between the sensor terminals when the hydrogen concentration is zero being above the first threshold resistance value, and the resistance value between the sensor terminals when the hydrogen concentration is a set value being below the second threshold resistance value.

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 application provides a porous carbon reinforced titanium-based hydrogen storage alloy composite material and a preparation method thereof. The porous carbon reinforced titanium-based hydrogen storage alloy composite material comprises the following components in parts by mass: 1-3 parts of SiO2 nanosphere templates, 1 part of sucrose, 0.01-0.05 parts of sulfuric acid, 1-2 parts of sodium hydroxide, 5-7 parts of titanium dioxide, 11-15 parts of ferrous sulfate heptahydrate, 2-4 parts of manganese nitrate hexahydrate, 0.5-1 part of lanthanum nitrate hexahydrate, 40-50 parts of calcium hydride and 40-50 parts of lithium chloride; wherein the SiO2 nanosphere templates have a pore diameter of 50-200 nm and a specific surface area of 50-200 m 2 / g. The porous carbon reinforced titanium-based hydrogen storage alloy composite material provided by the application improves the mass transfer and heat transfer efficiency of the material by setting the porous carbon structure, promotes the adsorption, dissociation and diffusion process of hydrogen molecules, improves the hydrogen storage kinetic performance, improves the cycle stability of the material, and improves the service life and comprehensive performance of the hydrogen storage material.

The present application relates to hydrogen purification technical field, a kind of high-efficiency stable palladium tube hydrogen purifier, comprising: shell assembly, shell assembly is made of shell, heat preservation layer and inner container, and heat preservation layer is filled in the gap between shell and inner container, the middle of one end of inner container is fixed with the original gas inlet pipe extending out of shell, and the one end of original gas inlet pipe is fixedly installed with inlet valve;Feed pretreatment component, feed pretreatment component is set in the one end of inner container close to original gas inlet pipe, and its top extends to the top side of shell;End cap, end cap is fixedly installed in the one end of shell away from original gas inlet pipe, and the middle of end cap is fixed with hydrogen outlet pipe.The present application realizes the multistage depth purification of hydrogen, greatly improves the recovery rate and purity of hydrogen after purification, simultaneously, high-efficiency breaks the laminar boundary layer formed by raw material gas on the surface of palladium tube body, reduces the resistance of hydrogen molecules from raw material gas main body to spread to the surface of palladium tube, and realizes the double energy saving of tail gas waste heat recovery and tail gas kinetic energy utilization.

This invention introduces a method for preparing hydrogen-based combustible ice based on hydrogen bonding. Currently, the successful preparation of hydrogen-based combustible ice globally is difficult primarily because the core value of hydrogen bonds in water molecules is generally overlooked in the industry. To successfully produce this type of combustible ice, a deep understanding of the unique functions and powerful forces of hydrogen bonds is essential. This invention uses the characteristics of hydrogen bonds as its core research focus, relying on hydrogen bonds to construct a cage-like structure of water molecules, encapsulating hydrogen molecules, thereby synthesizing structurally stable hydrogen-based combustible ice. This invention corrects past misconceptions about the technology, opens up a completely new research direction, and possesses significant scientific research value and practical application potential.

This invention relates to an MXene hydrogen storage catalyst, a hydrogen storage material containing the catalyst, and a preparation method thereof, belonging to the field of hydrogen storage technology. The MXene hydrogen storage catalyst has a surface functional group density of 25–39 at.%, which not only facilitates the adsorption and dissociation of hydrogen molecules by the transition metal in MXene but also promotes the diffusion of hydrogen atoms, achieving a good match between the hydrogen dissociation and diffusion processes. This catalyst exhibits higher catalytic activity and has significant advantages in improving the performance of magnesium-based hydrogen storage. When combined with MgH2, the composite hydrogen storage material releases 6.10 wt.% hydrogen within 4 minutes at 280°C and absorbs 5.26 wt.% hydrogen within 60 seconds at 100°C. Furthermore, after 50 hydrogen absorption / desorption cycles, the composite hydrogen storage material still retains a hydrogen storage capacity of over 4.8 wt.%. The catalyst exhibits good stability, a simple preparation process, and readily available raw materials, making it suitable for large-scale production.

This invention discloses a hydrogen supply system and hydrogen consumption equipment with a buffer function, relating to the field of hydrogen fuel cell technology. The system includes a housing, inside which a hydrogen storage tank and a fuel cell are fixedly installed. An air pump is fixedly connected to the input end of the hydrogen storage tank, and a delivery pipe is fixedly connected to the output end of the air pump. One end of the delivery pipe is fixedly connected to the fuel cell. A buffer mechanism is provided on the surface of the fuel cell. This hydrogen supply system with a buffer function, when the hydrogen storage tank supplies hydrogen to the fuel cell through the air pump and delivery pipe, allows excess hydrogen to enter a pressure relief box through a pressure relief pipe when the pressure in the delivery pipe becomes too high. This pressure relief causes the excess hydrogen to move and enter the pressure relief box through the pressure relief port, thus buffering the hydrogen supply and reducing the risk of affecting the diffusion rate and reaction rate of hydrogen molecules within the fuel cell stack.

The application provides an electrode structure for in-situ nitrogen separation, a fuel cell and a preparation method, and belongs to the technical field of fuel cells. The electrode structure comprises an anode gas diffusion layer and an anode catalytic layer, and a nitrogen selective separation adsorption layer is arranged between the anode gas diffusion layer and the anode catalytic layer. The separation adsorption layer is a porous film layer with a pore size between the kinetic diameter of a hydrogen molecule and the kinetic diameter of a nitrogen molecule, and is deposited on the side surface of the anode gas diffusion layer facing the anode catalytic layer in an in-situ growth manner. By adopting the technical scheme provided in the embodiment of the application, the problems in the prior art that the system volume increases sharply, the in-situ nitrogen separation cannot be realized at the electrode level, the nitrogen occupies the active sites of the catalytic layer, hinders the diffusion of hydrogen and accelerates the performance decay of the electrode can be solved.

This application provides a gas sensor, a battery pack, an energy storage system, and a new energy vehicle. The gas sensor includes a heating layer, an insulating layer, an electrode layer, and a gas-sensitive layer stacked sequentially. The gas-sensitive layer is made of tin-doped iron oxide, with at least a portion of the tin atomically doped into the iron oxide lattice. This allows for better dispersion of tin within the iron oxide lattice, resulting in more active sites. These active sites facilitate interaction between the gas-sensitive layer material and hydrogen molecules, improving the sensitivity of hydrogen detection and enabling better monitoring of hydrogen concentration. This, in turn, enhances the performance of the gas sensor and prevents thermal runaway.

This invention relates to a method for evaluating the gas absorption and flowability of impregnating agent molecules based on microscopic physical properties, belonging to the technical field of performance evaluation of impregnating agents for high-voltage power capacitors. The method first constructs a matrix of microscopic characteristic parameters for evaluating the gas absorption and flowability of impregnating agent molecules. Then, it constructs an adsorption system model of impregnating agent molecules adsorbing hydrogen molecules to calculate the parameters of adsorption energy, charge transfer, and adsorption distance. A solution model of impregnating agent molecules is then constructed to calculate the parameters of free volume fraction, diffusion coefficient, and interaction energy. Finally, the microscopic performance characteristics of the adsorption system and solution system of different types of impregnating agents are plotted as radar charts to comprehensively evaluate the gas absorption and flowability capabilities and differences of different types of impregnating agents. This invention, starting from the microscopic chemical structure level of impregnating agents, provides an effective technical means for selecting impregnating agents with excellent intrinsic gas absorption and flowability properties.

This invention relates to a hydrogen and oxygen measuring device and a method for detecting hydrogen and oxygen concentrations in a nuclear power plant. The hydrogen and oxygen measuring device includes a base, a housing, a detection component, and a membrane component. The base has mounting holes. The housing is detachably connected to the base and has a accommodating cavity extending through it along its axial direction. The accommodating cavity communicates with the mounting holes and is filled with an electrolyte. The detection component is disposed within the accommodating cavity, with one end detachably mounted in the mounting holes. The detection component is used to detect either hydrogen or oxygen concentrations. The membrane component is detachably connected to the housing and can selectively allow hydrogen or oxygen molecules to pass through. The detection component and membrane component, with preset element content, can be replaced within the accommodating cavity according to detection requirements. The same nuclear power plant hydrogen and oxygen measuring device can be compatible with both hydrogen and oxygen concentration detection components and membrane components, improving detection efficiency and reducing detection costs.

This invention belongs to the field of polymer technology, specifically relating to a method, system, and device for calculating the porosity of a hydrogen-sensitive colorimetric detection gel. It aims to solve the problems of existing tape detection methods, such as limited detection range, reliability limited by tape thickness and adhesion, and susceptibility to missed detections; and the complex preparation and poor final product quality of hydrogels, where porosity cannot be accurately calculated. This invention includes: a set of heat and mass transfer equations characterizing hydrogen molecule diffusion in a hydrogel, expressed in dimensionless form; obtaining equations for hydrogen flow and diffusion migration in the hydrogel by combining boundary motion constraints; solving for the physical properties of the material and calculating the hydrogel porosity; and preparing the hydrogen-sensitive colorimetric detection gel based on the hydrogel porosity. This invention calculates the porosity of the hydrogel and controls porosity during preparation, achieving precise location detection of hydrogen leaks, reducing the likelihood of missed detections. The preparation process is simple, the gel is recyclable, and the cost is low and safety is high.

The present application relates to a kind of Ni-In base composite catalyst and its preparation method and application in 3-hydroxypropionaldehyde hydrogenation preparation 1,3-propanediol, catalyst includes carrier and active component nickel, first auxiliary component indium, second auxiliary component supported on carrier;Wherein second auxiliary component is selected from at least one of iron, cobalt, manganese, silver, platinum, zinc, palladium, rhodium, ruthenium, tungsten, iridium, molybdenum, yttrium, niobium;Catalyst is synthesized using impregnation method, can be used for 3-hydroxypropionaldehyde hydrogenation preparation 1,3-propanediol reaction.Compared with prior art, the present application provides abundant active site for hydrogenation reaction by introducing first auxiliary In, hydrogen molecule is adsorbed and dissociated on active site, on the one hand, In2O3 surface is reduced to form oxygen vacancy, and oxygen vacancy enhances the adsorption activation capacity of reactant, on the other hand, activated hydrogen molecule speeds up the reaction rate.Based on the synergistic effect between active metal, first auxiliary In and second auxiliary, the catalyst has high activity and high selectivity.

The application provides a hydrogen diffusion behavior analysis method and system for a composite hydrogen pipeline, and belongs to the technical field of hydrogen energy storage and transportation. In view of the problem that the prior art is difficult to simultaneously analyze the diffusion differences of different material layers, the interlayer interface influence and the cross-layer migration process, a multilayer structure analysis model containing each material layer and an interlayer interface region is constructed; the hydrogen diffusion coefficients of the single-layer materials corresponding to each material layer are extracted; the cross-layer diffusion process of hydrogen molecules is tracked, and the interface equivalent diffusion coefficient of the interlayer interface region is calculated; the hydrogen diffusion coefficients of the single-layer materials and the interface equivalent diffusion coefficient are taken as diffusion units arranged in series, and the thicknesses are combined to perform series resistance superposition calculation, so that the overall diffusion coefficient of the composite pipeline is obtained. The application can comprehensively characterize the overall hydrogen diffusion behavior and hydrogen blocking performance, and provides a basis for material selection and structure optimization of the composite pipeline.

This invention relates to a liquid hydrogen storage tank and its operation method that reduces hydrogen loss. The liquid hydrogen storage tank includes an outer tank, an inner tank, and a vacuum insulation layer disposed between the outer and inner tanks. The vacuum insulation layer contains a hydrate layer that encloses the inner tank. The hydrate layer is based on copper foam. Before the inner tank is filled with liquid hydrogen, carbon dioxide hydrate forms within the pores of the copper foam to capture hydrogen molecules escaping from the inner tank. The hydrate layer containing carbon dioxide hydrate fills and solidifies the pores of the copper foam, forming a continuous, uniform, and structurally stable composite low-temperature hydrate functional layer. When hydrogen molecules escape from the inner tank, they directly enter the hydrate layer. The hydrate layer absorbs and encapsulates the evaporated hydrogen through low-temperature condensation, heterogeneous nucleation, and microporous retention, reducing the escape rate of evaporated hydrogen and effectively minimizing hydrogen loss.

The present invention relates to the technical field of hydrogen permeation resistance, and relates to an environmentally friendly chemical-resistant high-pressure hydrogen transmission and storage coating and a preparation method therefor. Montmorillonite is modified with dodecylbis(2-hydroxyethyl)methylammonium chloride, and zirconium oxide is deposited on the surface thereof to form a composite filler. The composite filler significantly improves the compatibility and dispersibility with a polymer matrix, and oxygen vacancies in zirconium dioxide are utilized to effectively adsorb and anchor hydrogen molecules, thereby further hindering diffusion and permeation of hydrogen. Cellulose nanocrystals are modified with stearic acid to successfully introduce hydrophobic groups, significantly reducing agglomeration phenomenon of the cellulose nanocrystals and improving the dispersibility and compatibility of the cellulose nanocrystals in a waterborne polyurethane emulsion. The modified cellulose nanocrystals provide the coating with excellent hydrogen barrier performance, chemical resistance, and mechanical strength, form a highly compact structure, effectively prevent hydrogen leakage, reduce pores and defects in the coating, and improve the compactness and hydrogen barrier performance of the coating.

The application relates to a prediction method and application of underground hydrogen adsorption behavior in a pore scale of a clay mineral containing impurities and water, and belongs to the technical field of underground hydrogen energy storage and unconventional energy development. The key points are as follows: an initial pore model of the clay mineral containing impurities and water is subjected to energy minimization and pre-equilibrium through a molecular dynamics method to obtain a stable pore model of the clay mineral containing impurities and water; based on the stable pore model of the clay mineral containing impurities and water, hydrogen fugacity is calculated through an SRK-EOS state equation, the corresponding relationship between the hydrogen fugacity and pressure is calibrated, and an initial hydrogen adsorption simulation model is obtained; based on the initial hydrogen adsorption simulation model, hydrogen molecules are introduced into the pore through a grand canonical Monte Carlo method with temperature and fugacity as input parameters, hydrogen insertion and deletion simulation is carried out, and a hydrogen adsorption model is obtained; and the hydrogen adsorption characteristics are calculated according to the hydrogen adsorption model, so that the prediction of the hydrogen adsorption behavior in the pore scale of an underground reservoir is realized.