76 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.

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 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.

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.

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.

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.

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.

According to some embodiments, a method of activating a battery system is presented. The method includes initiating a first activation sequence in a first time period on a first energy rack system, the first activation sequence including alternating charge and discharge cycles; initiating a second activation sequence in a second time period following the first time period on a second energy rack system, the second activation sequence including alternating charge and discharge cycles; and executing the first activation sequence and the second activation sequence until activation completion, wherein the first activation sequence is coordinate with the second activation sequence such that charge cycles in the first activation sequence correspond with discharge cycles of the second activation sequence and discharge cycles in the first activation sequence correspond with charge cycles of the second activation sequence.

Method for the dehydrogenation of a liquid hydrogen carrier material in the form of a metal hydride or a liquid organic hydrogen carrier (LOHC), comprising the following steps: a. The metal hydride or the LOHC is provided to a thin-film evaporator (1), wherein the LOHC is brought into contact with a catalyst which is added to the LOHC before it enters the thin-film evaporator (1), and / or wherein the LOHC comes into contact with a catalyst in the thin-film evaporator (1), b. In the thin-film evaporator (1), a film of the liquid hydrogen carrier material is mechanically generated on a cylindrical or conical heated wall (7) and held against the heated wall (7) by means of wiping elements (12, 13, 14) of a rotor (3), whereby the chemical bond of the hydrogen to the liquid hydrogen carrier material is broken by the supply of heat via the wall (7), the resulting hydrogen is withdrawn from the thin-film evaporator (1) and the remaining liquid hydrogen carrier material is collected.

The invention provides a reactor core block (200), comprising: a plurality of fuel channels (202); a plurality of heat pipes (204); a primary moderator matrix (206), consisting for example of graphite, silicon carbide, aluminum nitride, stainless steel, and combinations thereof, configured to encompass the plurality of fuel channels (202) and the plurality of heat pipes (204); and a secondary moderator channel (208) configured to at least partially surround the plurality of fuel channels (202), the plurality of heat pipes (204), and the primary moderator matrix (206). The secondary moderator channel (208) is comprised of metal hydride.

The application discloses a kind of solid metal hydride continuous hydrogen release device and process, belong to solid hydrogen storage technical field, the device includes: solid hydrogen storage material storage bin, high-pressure hydrogen cylinder, solid hydrogen storage material hydrolysis hydrogen release bin and hydrogen pipeline;Solid hydrogen storage material storage bin one end is connected with high-pressure hydrogen cylinder, the other end is connected with solid hydrogen storage material hydrolysis hydrogen release bin, and high-pressure hydrogen cylinder provides pressure for the feeding of solid hydrogen storage material storage bin, and transports solid hydrogen storage material to solid hydrogen storage material hydrolysis hydrogen release bin, and solid hydrogen storage material hydrolysis hydrogen release bin is hydrolyzed hydrogen release reaction by extracting natural water with solid hydrogen storage material and releases hydrogen, and the other end of solid hydrogen storage material hydrolysis hydrogen release bin is connected with hydrogen pipeline, and the generated hydrogen is supplied to fuel cell for use.The application carries out continuous hydrogen delivery for the device with small internal space and long-time hydrogen demand, solves the problems such as heat dissipation and water extraction in hydrogen production process, and realizes the controllable hydrogen release of hydrolysis hydrogen storage material in water.

The invention relates to the technical field of nuclear reactor cores, and particularly provides a reactor core with mixed arrangement of metal hydride fuel and metal fuel, which comprises a plurality of fuel assemblies, any fuel assembly comprises a metal hydride fuel rod loaded with metal hydride fuel and a metal fuel rod loaded with metal fuel; and in any one of the fuel assemblies, the proportion of the metal hydride fuel rods is 0-100%. The high uranium density and high proliferation characteristics of metal fuel and the hydrogen atom moderation characteristic of metal hydride fuel are utilized, the metal fuel and the metal hydride fuel are arranged in a mixed mode, meanwhile, the proportion of the metal hydride fuel and the metal fuel is adjusted according to the reactor core power life period and other design requirements, and customized adjustment of the reactor core energy spectrum is achieved; and the performance of the reactor core is optimized to meet the requirements of different application scenes.

The application discloses a kind of multicomponent boride and preparation method thereof, belong to carbide ceramic technical field.The application uses multicomponent alloy bulk as raw material, after hydrogenation treatment is carried out to raw material, then using the method of organic carbon source coating obtains carbon-coated mixture, then carbon-coated mixture is mixed with boric acid and is dried before sintering to obtain multicomponent boride.The above preparation method can avoid the oxygen impurity brought by conventional metal powder as raw material, avoid multicomponent metal hydride and boric acid contact reaction to generate boride at high temperature, at the same time organic carbon source can reduce boron element in boric acid and diffuse into carbide lattice, and react with excess oxygen element to form CO / CO2 gas, no second phase oxide impurity is formed in boride, and only needs to be at relatively low temperature 800-1300 DEG C, complete carbonization, boronization process, greatly reduce process condition, it is favorable to scale production multicomponent boride.

The application discloses a metal hydride hydrogen storage tank and a hydrogen storage method thereof, relates to the hydrogen storage technical field in the hydrogen energy industry, and comprises a hydrogen storage tank shell, a multilayer hydrogen storage module, a circulating heat exchange system and a bottom skirt, wherein a manhole is formed in the top of the hydrogen storage tank shell; a hydrogen inlet and a hydrogen outlet are formed in the side of the hydrogen storage tank shell; the multilayer hydrogen storage module and the circulating heat exchange system are arranged in the hydrogen storage tank shell and are connected; the hydrogen storage tank shell is welded on the bottom skirt, and a water inlet pipe and a water outlet pipe are led out from the bottom skirt. The modular metal hydride hydrogen storage tank can be used for a long time in a hydrogen atmosphere, can withstand the temperature change caused by hydrogen absorption and release, can withstand its own weight, avoids large deformation of the device in the use process, can be used for long-term cyclic hydrogen absorption and release, and safety, reliability and sustainability are maintained.

A tank arrangement includes a tank for liquid hydrogen, a boil-off management system having a catalyst, and a heater arranged on the hydrogen side behind a first pressure relief valve and thermally connected to the catalyst. The first pressure relief valve is configured to open when a specified first pressure is exceeded. The heater is designed as a passive metal hydride heater containing a metal hydride. A second pressure relief valve is arranged between the first pressure relief valve and the catalyst. The second pressure relief valve is configured to open when a specified second pressure, which is higher than the first pressure, is exceeded.

The invention discloses a metal hydrogenation device based on particle size classification and a metal hydrogenation method. The metal hydrogenation device comprises powder preparation equipment, conveying classification equipment, hydrogenation equipment and gas supply equipment, the powder preparation equipment is used for preparing a metal powder material; the conveying and grading equipment comprises a particle size grading unit and is used for carrying out at least two-stage grading treatment on the metal powder material to obtain the metal powder material with at least three particle size sections; the hydrogenation equipment comprises a plurality of independent hydrogenation reaction units which are respectively used for carrying out hydrogenation treatment on the metal powder materials of different particle size sections; the gas supply equipment is respectively connected with the powder preparation equipment, the conveying and grading equipment and the hydrogenation equipment, and is used for blowing the metal powder materials into the particle size grading unit for grading treatment, and then respectively blowing the graded metal powder materials with different particle size sections into the hydrogenation reaction unit; and the hydrogen supply condition is determined according to the particle size range of the metal powder material in each hydrogenation reaction unit.

The invention relates to the technical field of purification of refractory metal powder and preparation of high-purity metal, in particular to a method for purifying molybdenum powder through vacuum distillation and hydrogen reduction. In order to further remove high-volatility impurities and rare earth elements in the high-purity molybdenum powder, the invention provides a molybdenum powder purification method by utilizing vacuum distillation and hydrogen reduction, which comprises the following steps: firstly, carrying out vacuum distillation under the pressure of 1-20Pa and the temperature of 1000-1200 DEG C to remove high-volatility impurities such as K, Zn and Cd; and then in the hydrogen-argon mixed atmosphere with the hydrogen volume fraction being 3%-10%, the non-volatile rare earth elements such as La are subjected to a hydrogenation reaction to generate metal hydrides such as LaH2, the vapor pressure of the metal hydrides is remarkably improved, the metal hydrides have the migration capacity, molybdenum powder purification is achieved, and the purity of the finally obtained molybdenum powder reaches 99.80% or above.