130 results about "Metallic hydrogen" patented technology

The invention relates to the technical field of hydrogen energy solid hydrogen storage, and discloses a metal hydride hydrogen storage tank and a circulating hydrogen charging and discharging method.The metal hydride hydrogen storage tank comprises a tank body, the top end of the tank body is communicated with a gas inlet pipe, and the bottom end of the gas inlet pipe extends into the tank body and is rotationally provided with a connecting pipe through a rotating connector; a plurality of circular heat dissipation fins are fixedly connected between the inner walls of the tank body, the bottom end of the connecting pipe penetrates through the heat dissipation fins to be rotationally connected with the bottom end of the tank body, and a plurality of air holes are formed in the surface of each heat dissipation fin; four telescopic rods are fixedly connected to the top wall of the interior of the tank body, the hydrogen storage tank drives the transmission assembly to drive the connecting pipe and the stirring plate to rotate through movement of the piston, metal hydride is prevented from caking, hydrogen is dispersed more evenly through inclined air outlet holes, and the hydrogen storage efficiency is improved; the circular heat dissipation fins are provided with air holes, so that heat dissipation is achieved, and circulation of hydrogen is not blocked.

A device for compressing a medium is equipped with a compressor unit (2) for compressing a drive medium and with a pressure intensifier (13) operatively connected to the compressor unit, in which a drive piston (15) driven by the drive medium and a high-pressure piston (18a, 18b) cooperating with the drive piston (15) for compressing the medium to be compressed is arranged. According to the invention, hydrogen is used as the drive medium, and the compressor unit (2) comprises a hydrogen storage system (3a, 3b) which has a pressure vessel (4a, 4b) equipped with a metal hydride storage medium (7a, 7b) with at least one supply line (5a, 5b, 6a, 6b) for supplying and / or removing hydrogen into or from the pressure vessel (4a, 4b) and a heating device (8a, 8b) for heating the metal hydride storage medium (7a, 7b) in the pressure vessel (4a, 4b).

The invention discloses a solid hydrogen storage and fuel cell energy coupling system and method, and belongs to the technical field of fuel cells, the system comprises a solid hydrogen storage module, a combustion cell, a hydrogen storage pipeline, a hydrogen delivery pipeline and a circulation pipeline, the hydrogen storage pipeline is used for inputting hydrogen into the solid hydrogen storage module, the hydrogen conveying pipeline is used for conveying hydrogen output by the solid hydrogen storage module to the fuel cell; the solid hydrogen storage module comprises a plurality of reactors, each reactor is of a double-layer structure composed of a first cavity and a second cavity, the first cavity is filled with a metal hydride bed and a heat exchange pipe penetrating through the metal hydride bed, and first heat exchange fins distributed in the metal hydride bed are installed on the heat exchange pipe; a phase-change material and spiral second heat exchange fins distributed in the phase-change material are arranged in the second cavity; each heat exchange pipe is connected into a circulating pipeline penetrating through the fuel cell, and a circulating medium circularly flowing in the circulating pipeline transfers heat generated by power generation of the fuel cell into the metal hydride bed to promote hydrogen release.

The invention discloses a hydrogen energy production and production-and-use distributed energy supply system, which relates to the technical field of new energy, and comprises a hydrogen production module which comprises a proton exchange membrane electrolytic tank, an alkaline electrolytic tank and a solid oxide electrolytic tank and runs through a three-mode collaborative architecture, in combination with a light-electricity-heat synergistic catalysis device and a wastewater or industrial tail gas coupling hydrogen production device, the hydrogen storage and safety management module comprises a metal hydride hydrogen storage unit, a metal organic framework material hydrogen storage unit and a liquid organic hydrogen storage unit. According to the invention, multi-source, high-efficiency and low-cost hydrogen production is realized through the hydrogen production module with a three-mode collaborative architecture in combination with light-electricity-heat collaborative catalysis and wastewater / industrial tail gas coupling hydrogen production, and meanwhile, a solid oxide fuel cell and micro gas turbine combined cycle, a hydrogen combustion turbine direct drive and a multi-type energy storage unit in the energy supply module realize multi-source, high-efficiency and low-cost hydrogen production. And in cooperation with waste heat-cold energy gradient utilization, the energy conversion efficiency and the comprehensive energy utilization rate are greatly improved.

The invention provides metal-hydrogen modified porous carbon and a preparation method thereof, a silicon-carbon composite material and a preparation method thereof, and a battery, and the preparation method of the metal-hydrogen modified porous carbon comprises the following steps: mixing an aldehyde compound, a phenolic compound, a metal source and a catalyst, and carrying out heating treatment to prepare modified phenolic resin; carrying out carbonization treatment on the modified phenolic resin to prepare metal-doped porous carbon; mixing the metal-doped porous carbon with a metal hydride reducing agent, and performing reduction treatment to prepare metal-hydrogen modified porous carbon; wherein the mass ratio of metal elements to phenolic compounds in the metal source is (2-5): 100. A proper amount of metal-hydrogen bonds are introduced into the inner surface of a porous carbon pore structure; when the porous carbon is subsequently subjected to silicon deposition, low-temperature, uniform and confined deposition of nano silicon in a porous carbon matrix is facilitated, and the silicon-carbon composite material with low expansion rate and excellent electrochemical performance is prepared.

A gas permeation and leakage rate testing device and method for a non-metallic hydrogen transmission pipe. The device includes: a testing member formed with a testing cavity adapted to placing a to-be-tested pipe, and the testing cavity being formed with a sealed testing chamber after the to-be-tested pipe is placed therein; a calibration chamber selectively communicated with the testing chamber; a first gas-filling assembly selectively communicated with the calibration chamber to be adapted to filling a gas into the calibration chamber to a first set pressure; a measuring unit configured to measure pressures and temperatures in the calibration chamber and the testing chamber, and to calculate a calculated volume of the testing chamber; and a permeation and leakage rate testing unit configured to obtain a pressure change value of the testing chamber in a preset time interval and calculate a gas permeation and leakage rate of the to-be-tested pipe.

The invention discloses a slurry hydrogen storage fuel cell system, which comprises: a hydrogen storage slurry circulation module for storing and circulating a slurry hydrogen storage material; the slurry hydrogen storage material comprises organic liquid and metal hydride; the fuel cell adopts a liquid metal anode; the fuel cell comprises an anode inlet and an anode outlet; a separator for separating the anode discharge; the metal hydride powder feeder is used for supplementing metal hydride powder to the hydrogen storage slurry circulating module; wherein the slurry hydrogen storage material reacts on a liquid metal anode interface to generate electric energy and form organic liquid vapor; and the organic liquid vapor is discharged into the separator from the anode outlet, is separated, is conveyed into the hydrogen storage slurry circulating module, and is mixed with the metal hydride powder from the metal hydride powder feeder to form a slurry hydrogen storage material. According to the invention, direct power generation of the slurry hydrogen storage material on the fuel cell anode interface is realized, and the power density of the system is greatly improved.

The invention relates to the technical field of electrochemical hydrogen permeation devices, in particular to a thermodynamic coupling electrochemical hydrogen permeation device and a use method thereof.The thermodynamic coupling electrochemical hydrogen permeation device comprises a device body, a sample, an electrochemical workstation, a galvanostat and a data collection unit, and one side face of the sample is plated with nickel; the device body is internally provided with a cavity body, the sample is detachably mounted on the device body, the sample divides the cavity body into a cathode chamber and an anode chamber which are horizontally and oppositely arranged and mutually closed, the cathode chamber contains a 0.1 mol / L hydrogen chloride solution, and when the device is used, the sample is arranged between the cathode chamber and the anode chamber; under the action of a constant-temperature water circulation system, the solution in the anode chamber is circularly heated, then the solution in the cathode chamber is pressurized, so that the solution in the anode chamber is in a constant-temperature state, sample data are measured through an electrochemical workstation and a galvanostat, and the metal hydrogen permeation test at high temperature and high pressure is realized.

The present invention relates to the technical field of metal hydrogen-based smelting, and specifically discloses a hydrogen flash direct reduction process for metal ore powder, which integrates ore powder pretreatment, heating, reduction, separation, cooling, metal smelting, waste heat recovery, and flue gas purification, and realizes functions such as ore powder suspension heating, flash reduction, metal separation, electric furnace smelting, hydrogen preheating, heat recycling, and environmentally friendly emissions. The process flow is highly controllable, the heat energy recycling rate is high, the requirements for raw material quality are low, the processing capacity is large, the mineral processing process and the smelting process can be shortened, and the integrated metal mineral dressing and smelting and the high-efficiency, energy-saving, and environmentally friendly goals of metal hydrogen-based smelting are realized, and significant economic and social benefits are achieved in the field of metal dressing and smelting.

The invention discloses a vortex channel hydrogen storage reactor of a fluid streaming gradual change hydrogen storage tank unit, and belongs to the field of chemical reactor design. The whole reactor is a cylindrical shell, a heat exchange fluid inlet is formed in the center of the upper side of the shell, a hydrogen inlet is formed in a left end shell cover, and a heat exchange fluid outlet is formed in a right end shell cover; the heat exchange fluid channel is in a vortex shape, the multiple hydrogen storage tank units are sequentially arranged in the center of a flow channel of the vortex channel, and the diameter of the hydrogen storage tank is evenly reduced from the shell to the center position. Hydrogen enters the bed layer through a hydrogen pipe in the hydrogen storage tank and reacts with the metal hydride; meanwhile, the heat exchange fluid in the vortex channel flows around the hydrogen storage tank unit in the axial direction for heat exchange and then flows out through an outlet; the hydrogen storage tank has the advantages of excellent heat and mass transfer performance, uniform bed temperature of the hydrogen storage tank, small pressure-bearing stress of the tank body, synchronous reaction process of each hydrogen storage tank, high reliability and long service life, and is suitable for hydrogenation / dehydrogenation reaction of metal hydride with high hydrogen storage capacity requirement and larger reaction heat effect.

The invention provides a structure for strengthening heat transfer in a metal hydride hydrogen storage reactor, and belongs to the technical field of solid hydrogen storage, the structure comprises a hydrogen storage reactor tank body, a hydrogen pipe and a spiral pipe are installed in the hydrogen storage reactor tank body, the spiral pipe comprises a central straight pipe, the central straight pipe is communicated with a spiral branch pipe, and the spiral branch pipe is communicated with the central straight pipe. N inner fins are uniformly distributed and mounted on the central straight pipe in the axial direction, M outer fins are uniformly distributed and mounted on the spiral branch pipes in the axial direction, the hydrogen storage reactor tank body is filled with hydrogen storage alloy, hydrogen enters the hydrogen storage reactor tank body through the hydrogen pipe, and heat exchange fluid enters the hydrogen storage reactor tank body through one end of the spiral pipe. The problems of low heat transfer efficiency caused by insufficient heat exchange area and reaction dynamic unbalance caused by uneven temperature distribution are solved, the heat exchange efficiency is improved through an integrated heat exchange structure, and sufficient heat exchange of heat exchange fluid in the hydrogen storage reactor is ensured by combining the spiral pipe and the inner and outer fins; the energy utilization rate of the heat exchange fluid and the hydrogen storage performance of the hydrogen storage reactor are improved.

This invention belongs to the field of hydrogen energy technology and provides a metal hydride hydrogen energy storage system and its thermal management method. The metal hydride hydrogen energy storage system includes a fuel cell, a heat exchange fluid circulation system, and multiple parallel-connected metal hydride hydrogen storage devices. The heat exchange fluid circulation system is connected to the multiple parallel-connected metal hydride hydrogen storage devices through the fuel cell. One end of each metal hydride hydrogen storage device is provided with a hydrogen inlet / outlet, a first heat exchange fluid inlet, and a second heat exchange fluid inlet, and the other end is provided with a first heat exchange fluid outlet and a second heat exchange fluid outlet. A hydrogen buffer zone is provided between the hydrogen inlet / outlet and the metal hydride region. The metal hydride hydrogen storage device is filled with metal hydride and also has a through-type inner and outer heat exchange tube bundle. This significantly improves the hydrogen storage / desorption efficiency of the hydrogen storage reactor and shortens the reaction time.

The invention relates to the field of metal hydrogenation equipment, and discloses a heat energy management system which comprises a reaction heat management device arranged on a reactor, the reaction heat management device comprises upflow and a reaction heat exchanger, the reactor comprises an air inlet pipe and an air outlet pipe, and the upflow is continuously introduced from the air inlet pipe below the reactor; the gas is discharged from a gas outlet pipe above the reactor; and the reaction heat exchanger is fixed on the outer wall of the reactor and can perform heat management on the reactor. A reaction heat management device is formed by ascending airflow and a reaction heat exchanger, hydrogenation reaction is carried out in a vertically arranged reaction container, metal powder is suspended by the ascending airflow to carry out hydrogenation reaction, and heat energy released in the reaction process is taken away by heat convection of the ascending airflow and the reaction heat exchanger; according to the method, the metal powder is added, local high temperature is avoided, the hydrogenation reaction process is easier to control, the controllability of the hydrogenation reaction is improved, and possibility is provided for continuous hydrogenation of the metal powder.

The application discloses a method for driving metal hydride reversible hydrogen storage by light. The method comprises the following steps: (1) introducing non-active gas into a sealed transparent reactor containing metal hydride powder; (2) applying light to the reactor to remove hydrogen and obtain a dehydrogenation product; (3) hydrogenating the dehydrogenation product in a hydrogen atmosphere to obtain the metal hydride; wherein the metal hydride is selected from at least one of alkali metal hydride, alkaline earth metal hydride and rare earth metal hydride; and the valence of hydrogen in the metal hydride is -1. In the application, the metal hydride can be directly driven by light energy, has high reactivity, and can realize reversible dehydrogenation cycle at normal temperature by using specific hydride, so that the process is simple and suitable for large-scale production.

The invention belongs to the technical field of nuclear reactor cores, and particularly relates to a fast thermal coupling metal hydride reactor core controlled by a rotating drum and a rotating drum control method, and the reactor core comprises the rotating drum, a reactor core active area, a coolant flow channel, a beryllium oxide reflecting layer and a thermal insulation shielding layer; the coolant flow channel is composed of a coolant flow channel inner barrel and a coolant flow channel outer barrel; the reactor core active area is wrapped by the coolant flow channel inner barrel, and oxide fuel rods and metal hydride fuel rods are arranged in the reactor core active area; the beryllium oxide reflecting layer is arranged on the coolant flow channel outer barrel in a sleeving manner, and the heat preservation shielding layer is arranged on the beryllium oxide reflecting layer in a sleeving manner; a plurality of rotating drums are arranged between the beryllium oxide reflecting layer and the heat preservation shielding layer in the circumferential direction. The oxide fuel rods and the metal hydride fuel rods are arranged in the reactor core active area at the same time, so that the fast thermal coupling design of a reactor core neutron energy spectrum is realized, and the reactivity control value of the rotating drum is improved.

A hydrogen fueling system (1) comprising a control system (10), a hydrogen storage unit (2), a cooling system (3), a heating system (4), and a heat transfer fluid circuit interconnecting the hydrogen storage unit (2) to the cooling system (3) and the heating system (4), the hydrogen fueling system configured for receiving hydrogen from a hydrogen source at a first pressure through a hydrogen inlet (11i) and outputting hydrogen at a second pressure higher that the first pressure through a hydrogen outlet (16), the hydrogen storage unit comprising containers lodging therein a metal hydride adapted for hydrogen storage, the cooling system connected to the heat transfer fluid circuit via at least one valve (Vc1, Vc2) and the heating system connected to the heat transfer fluid circuit via at least one valve (Vh1, Vh2). The heating system (4) comprises a thermal energy storage unit (7) including a tank containing a volume of thermal liquid connected to a heating unit (8, 9), the volume of thermal liquid comprising a sensible thermal energy capacity exceeding 80% of a thermal energy required by the hydrogen storage unit to desorb and compress to the second pressure at least 80% of the hydrogen stored in a full hydrogen storage unit (2).

The invention discloses a full-sea-depth metal hydrogen manufacturing device which comprises an upper shell and a lower shell which are assembled together, a water inlet hole communicated with the outside is formed in the upper shell or the lower shell to form an open structure, clamping grooves are correspondingly formed in the upper shell and the lower shell, an anode and a counter electrode are arranged in the clamping grooves in the two sides respectively, and the anode and the counter electrode are arranged in the clamping grooves in the two sides respectively. A bipolar electrode composed of a diaphragm, an anode and a counter electrode is inserted into the middle clamping groove, the anode and the counter electrode are clamped on the two sides of the diaphragm, the anode and the counter electrode are connected through a conductive connecting piece penetrating through the diaphragm, and the connecting piece in the upper shell and the connecting piece in the lower shell are connected with a controller through a watertight cable. The device is of an open structure, the internal and external pressure difference of the device is eliminated, seawater serves as electrolyte, the electrolyte does not need to be carried, and the hydrogen production rate can be adjusted through the controller.

The invention relates to the technical field of metal hydrogenation, and discloses a metal hydride preparation method, which comprises: S1, gas introduction: continuously introducing hydrogen gas with a pressure of 1-6 MPa and a temperature of 50-500 DEG C into a vertical reactor to form an upflow from bottom to top; and S2, hydrogenation: continuously feeding metal powder with the particle size of less than 2000 microns through a feeding pipe, carrying out hydrogenation reaction under the lifting of ascending airflow, discharging the product from an air outlet pipe along with the airflow, and starting a reaction heat exchanger to control the temperature and maintain the temperature required by the reaction. According to the method, metal powder is suspended and dispersed through ascending airflow, gas-solid contact is enhanced, and the reaction efficiency is improved; upflow has the functions of reaction and heat dissipation, reaction heat is timely guided out through convection, and caking or melting caused by local overheating is prevented; by combining temperature regulation and control of the reaction heat exchanger, dynamic heat balance is realized, the reaction stability is effectively guaranteed, the purity and granularity uniformity of the product are remarkably improved, and the method is suitable for continuous and high-quality metal hydride preparation.

The application provides a pressure regulating hydrogen storage device, a pressure regulating hydrogen storage method and a composite hydrogen delivery system, which can deliver hydrogen under pressure for a long time and meet the filling demand of hydrogen for hydrogenation load with large capacity. The pressure regulating hydrogen storage device comprises a hydrogen delivery pipeline, a pressure regulating hydrogen storage unit and a temperature regulating liquid bath unit. The pressure regulating hydrogen storage unit comprises a first pressure regulating hydrogen storage tank group filled with a first metal hydride hydrogen storage material and a second pressure regulating hydrogen storage tank group filled with a second metal hydride hydrogen storage material, which are sequentially connected in series along the hydrogen delivery direction of the hydrogen delivery pipeline. The platform pressure of the first metal hydride hydrogen storage material at room temperature is less than that of the second metal hydride hydrogen storage material at room temperature. The temperature regulating liquid bath unit comprises a first temperature regulating bath chamber containing the first pressure regulating hydrogen storage tank group, a second temperature regulating bath chamber containing the second pressure regulating hydrogen storage tank group and a temperature regulating liquid delivery tank in circulation communication with the first temperature regulating bath chamber and the second temperature regulating bath chamber, respectively.

The utility model discloses a tubular metal hydride hydrogen storage tank, which belongs to the technical field of hydrogen storage and comprises a support seat, a central heat exchange tube, an outer winding heat exchange pipeline, a hydrogen storage long tank, a hydrogen inlet and a hydrogen outlet. Supporting seats are fixedly mounted at the two ends of the long hydrogen storage tank respectively, and hydrogen storage alloy powder is filled in the long hydrogen storage tank; the central heat exchange tube is arranged in the hydrogen storage long tank; the outer winding heat exchange pipeline is wound on the outer wall of the long hydrogen storage tank and is propped against the long hydrogen storage tank; the section of the outer winding heat exchange pipeline is semicircular; the winding directions of the adjacent outer winding heat exchange pipelines are opposite; a hydrogen inlet is formed in one end of the hydrogen storage long tank, and a hydrogen outlet is formed in the other end; and a central heat exchange pipe water outlet of the central heat exchange pipe and a winding pipe water inlet of the outer winding heat exchange pipeline are positioned on the same side of the hydrogen storage long tank. By designing the inner and outer heat exchange systems, heat exchange of the hydrogen storage alloy powder is facilitated, and the hydrogen absorption and desorption rate is increased.

A method and medium for simulating a hydrogen absorption / desorption process of a hydrogen storage device relates to the technical field of energy system modeling and simulation, and the method comprises the following steps: obtaining a hydrogen absorption / desorption reaction model of a hydrogen storage material, the hydrogen storage material being a metal hydride for hydrogen storage and desorption in the hydrogen storage device; based on the reaction model, a user-defined function is generated, and the user-defined function is used for representing the hydrogen absorption / desorption process of the hydrogen storage material; determining a user-defined scalar based on the conversion rate of the hydrogen storage material; and based on the user-defined function and the user-defined scalar, simulating the hydrogen absorption / desorption process of the hydrogen storage device by using simulation software so as to realize coupling calculation of hydrogen absorption / desorption reaction and flow, heat transfer and mass transfer.

A metal hydride fuel burn-up self-sustaining reactor core controlled by burnable poison relates to the technical field of nuclear reactor cores, and comprises a low-enrichment-degree control rod-free fuel assembly located in the center of the reactor core, and a middle-enrichment-degree control rod-free fuel assembly arranged around the periphery of the low-enrichment-degree control rod-free fuel assembly. A middle-enrichment-degree safety rod-containing fuel assembly is arranged between the fuel tank and the fuel tank; a high-enrichment-degree control rod-free fuel assembly is arranged around the periphery of the medium-enrichment-degree control rod-free fuel assembly, and a medium-enrichment-degree compensation adjusting rod-containing fuel assembly is arranged between the medium-enrichment-degree control rod-free fuel assembly and the high-enrichment-degree control rod-free The periphery of the high-enrichment-degree control rod-free fuel assembly is filled with lead bismuth; the reactor core is used for solving the problem that a traditional reactor core is difficult to reach expected burnup depth and even causes short service life.

The present application relates to helium purification device and method, specifically relates to a kind of metal hydride reactor dehydrogenation helium extraction device and method, purpose is to solve the problems of insufficient pressure fluctuation suppression ability, energy utilization efficiency, energy consumption is higher or the problem of insufficient safety that helium purification technology exists.The present application device includes heat exchanger, first reactor and second reactor are filled with metal hydride and are in parallel, and hydrogen storage tank and related monitoring and control components;First reactor, second reactor and heat exchanger are connected with external public heat exchange equipment.The present application method includes alternately using first reactor, second reactor carries out adsorption and desorption work, and according to actual situation, hydrogen storage tank releases hydrogen, and the system is self-pressurized.The present application improves energy utilization efficiency, reduces the energy consumption of device overall, and the pressure fluctuation of entire system is stable.

The invention discloses an alkaline earth metal stable oxygen-like superatomic cluster material and a preparation method thereof.The material is prepared from aluminum powder, alkaline earth metal hydride and anhydrous metal halide serving as a structure-directing agent, and the preparation method comprises the steps that firstly, under the inert atmosphere, the raw materials are subjected to high-energy ball milling to prepare a composite precursor; then temperature programming heat treatment is carried out, hydrogen generated by hydride in-situ decomposition is used for reducing an interface and inducing lattice defects, and meanwhile, interface migration and chemical adsorption effects of halide ions are used for pinning newly generated cluster units; and finally, carrying out non-equilibrium densification through spark plasma sintering. According to the method, the defect that a thermodynamically stable alloy phase is easily formed in a traditional smelting method is overcome, the oxygen-like cluster structure with the 38 electron open shell layer characteristic is successfully stabilized in a macroscopic solid state through a synergistic mechanism of gas phase pore forming and interface pinning, and the material is endowed with excellent catalytic activity and semimetal conduction characteristic.

The invention discloses a spiral array tube-shell type hydrogen storage reactor with fluid flowing around a hydrogen storage tank, and belongs to the field of chemical reactor design. The whole reactor is a cylindrical shell, a heat exchange fluid inlet is formed in the center of the upper side of the shell, a hydrogen inlet is formed in a left end shell cover, and a heat exchange fluid outlet is formed in a right end shell cover; the multiple hydrogen storage tank units are arranged in a spiral array mode and are arranged in a gradually-changing-spacing or gradually-changing-diameter mode, and the hydrogen storage tank array serves as a heat exchange channel wall face. Hydrogen enters the bed layer through a hydrogen pipe in the hydrogen storage tank and reacts with the metal hydride; meanwhile, the heat exchange fluid in the spiral channel flows around the hydrogen storage tank unit in the axial direction for heat exchange and then flows out through an outlet. The hydrogen storage tank has the advantages of excellent heat and mass transfer performance, uniform bed temperature of the hydrogen storage tank and small tank body stress; different hydrogen storage tanks are synchronous in reaction process and high in reliability; the hydrogen storage tank array serves as a heat exchange channel wall surface, and the mass of the reactor is remarkably reduced. And the requirements of hydrogenation / dehydrogenation reaction with high hydrogen storage capacity requirement and large reaction heat effect can be met.

To produce high-purity hydrogen while suppressing the deterioration in heat efficiency when the off-gas discharged from an electrolytic cell is recirculated to the electrolytic cell.SOLUTION: An electrolysis system includes: an electrolysis module comprising a solid oxide electrolytic cell and a thermal insulation housing container that accommodates the electrolytic cell; a water vapor feed line that supplies water vapor to the electrolytic cell; and a hydrogen separation unit having a metal hydrogen-permeable membrane and accommodated in the housing container, which receives off-gas containing produced hydrogen and water vapor discharged from the electrolytic cell, outputs the produced hydrogen that has permeated the hydrogen-permeable membrane to a produced hydrogen line outside the housing container, and outputs the produced hydrogen and water vapor that have not permeated the hydrogen-permeable membrane to the water vapor feed line within the housing container. The housing container has a first storage space that accommodates the electrolytic cell, and a second storage space that is maintained at a temperature lower than that of the first storage space. The hydrogen separation unit is accommodated in the second storage space.SELECTED DRAWING: Figure 1

Neutron shielding comprising a metal-hydride metal composite: the metal-hydride metal composite comprising: a metal matrix; and a plurality of metal-hydride particles dispersed within the metal matrix; wherein, the fraction of metal-hydride in the metal-hydride metal composite is at least 1 mol % and the volume fraction of metal-hydride in the metal hydride metal composite is no higher than the ratio of the solid solubility limit of hydrogen in the metal matrix and the molar fraction of hydrogen in the metal-hydride.

This invention relates to the field of metal hydride hydrogen storage materials, and particularly to a metal hydride hydrogen storage material, its preparation method, and its applications. The method includes the following steps: First, using metal hydride and metallocene as starting materials; second, ball milling the materials in an Ar glove box; third, ball milling in a ball mill jar filled with a hydrogen atmosphere or an inert atmosphere. This invention provides a method for controlling the thermodynamics of metal hydrides. This method is simple, exhibits lower thermodynamic stability and better kinetic performance, making it promising for future applications. It allows control of the thickness of the surface coating layer, enabling thermodynamic / kinetic regulation of hydrogen absorption and desorption without affecting hydrogen transport. The preparation method is simple, requiring only high-energy ball milling to obtain the product. It effectively improves the hydrogen absorption / desorption performance of metal hydride materials and enables the development of a high-performance metal hydride hydrogen storage system, which can be widely applied in hydrogen fuel cell vehicles, hydrogen refueling stations, hydrogen purification and separation, and other fields.

The application relates to the technical field of air conditioner protection, and discloses an overload protection method for an electrochemical air conditioner, which comprises the following steps: when the electrochemical air conditioner is running, the hydrogen conveying flow rate in a hydrogen conveying pipeline and the temperature difference between two metal hydride heat exchangers are obtained; the hydrogen pressure difference between the two metal hydride heat exchangers is determined according to the hydrogen conveying flow rate in the hydrogen conveying pipeline and the temperature difference between the two metal hydride heat exchangers; overload protection judgment is performed according to the hydrogen pressure difference between the two metal hydride heat exchangers, and corresponding protection strategies are triggered. The overload protection method provided by the embodiment of the application determines the pressure difference condition between the two metal hydride heat exchangers according to the hydrogen conveying flow rate of the hydrogen conveying pipeline and the temperature difference between the two metal hydride heat exchangers, and then performs overload protection judgment according to the pressure difference condition, thereby reducing the probability of hydrogen leakage and other risks of the air conditioner caused by overload. The application further discloses an overload protection device for the electrochemical air conditioner and the electrochemical air conditioner.

The invention discloses a neodymium iron boron magnet and a preparation method thereof. The method comprises the following steps: (1) metal hydride powder is attached to two opposite surfaces perpendicular to the orientation direction of a neodymium-iron-boron magnet blank, and a first pretreated blank is obtained; wherein the composition of the neodymium-iron-boron magnet green body is RExFebalMyBz, and the formula of the neodymium-iron-boron magnet green body is as follows The metal hydride forming the metal hydride powder is selected from one or more of ZrH and TiH; (2) attaching alloy powder to two opposite surfaces perpendicular to the orientation direction of the first pretreated blank to obtain a second pretreated blank; wherein the composition of the alloy powder is LEmN (100-m); and (3) carrying out compression molding on the second pretreated blank, and then carrying out heat treatment to obtain the neodymium-iron-boron magnet. According to the preparation method, the intrinsic coercive force of the neodymium-iron-boron magnet can be improved.