227 results about "Metallic hydrogen" patented technology

The present invention relates to a metal hydride hydrogen storage container which is easy to disassemble and can effectively exchange heat, and relates to the technical field of hydrogen storage containers, and in particular to a metal hydride hydrogen storage container which is easy to disassemble and can effectively exchange heat. The present invention comprises: a hydrogen storage alloy tank, a sleeve, a flange and a hydrogen valve; the hydrogen storage alloy tank is installed in the sleeve, and the flange is sealed and connected by a rubber gasket and flange bolts and nuts; a hydrogen valve is installed at the center of the flange; and the interior of the hydrogen storage alloy tank is filled with hydrogen storage alloy powder. The technical solution of the present invention solves the problems in the prior art that the hydrogen storage alloy generates stress on the inner wall of the container due to lattice expansion during the hydrogen absorption process, causing the container to deform and affecting the service life of the container; the hydrogen storage alloy has poor long-term cycle stability and needs to be frequently replaced; the hydrogen storage alloy has poor thermal conductivity and the hydrogen storage device needs to transfer heat to the outside world.

This high-pressure tank stores, inside a tank body, a mixed gas that contains natural gas and hydrogen, and that contains more than 2% hydrogen by volume. The tank body includes: a cylindrical part extending in a first direction; and a dome part connected to both ends of the cylindrical part in the first direction. The steel material constituting the tank body has a tensile strength TS of 850 MPa or higher, has a structure in which 95% or more by area ratio is tempered martensite, and includes carbides of 100 nm or less scattered in the metal structure as precipitates. The high-pressure tank has a strength of 11250 cycles or more in crack progress analysis, suppresses the influence of hydrogen embrittlement in metal, ensures gas storage capacity, and has a reduced weight.

The invention relates to a hydrogen storage pellet enabling the production of compact, modular, safe and energy-efficient hydrogen reservoirs. The pellet according to the invention comprises a peripheral ring (4) having an outer diameter of expanded natural graphite (ENG) of a determined height, surrounding a wafer of a metal hydride (5) in the form of compacted powder.

The invention relates to the technical field of hydrogen storage, and discloses a metal hydride hydrogen storage system and a hydrogen absorption and desorption method. The metal hydride hydrogen storage system comprises n hydrogen storage units which are connected in series, and n is 3-20 and is a positive integer; the adjacent hydrogen storage units are connected through a detachable connecting unit, an open hole is formed in the detachable connecting unit, and the open hole is used for circulation of hydrogen; the hydrogen storage unit comprises a tank body, the tank body is filled with a hydrogen storage bed layer, and the hydrogen storage bed layer is used for hydrogen absorption / hydrogen desorption and heat conduction. According to the hydrogen storage system, the hydrogen storage volume can be flexibly controlled, hydrogen storage material filling is simpler, the heat transfer efficiency can be improved, and the hydrogen absorption and desorption rate can be better controlled.

The invention belongs to the technical field of hydrogen production, and particularly relates to a double-tank metal hydride hydrogen purification device which comprises a first tank body, a second tank body, a primary exhaust pipe, a gas communicating pipe, a first liquid passing bathroom, a second liquid passing bathroom, a circulating liquid bath chamber and a liquid communicating pipe. A first perforated pipe and a first metal hydride are arranged in the first tank body; and a second perforated pipe and a second metal hydride are arranged in the second tank body. The primary exhaust pipe is communicated with the first perforated pipe, and the gas communication pipe is communicated with the primary exhaust pipe and the second perforated pipe. And the first tank body and the second tank body are coated with the first liquid passing bathroom and the second liquid passing bathroom respectively. And the first liquid passing bathroom, the circulating liquid bath chamber, the second liquid passing bathroom and the liquid communicating pipe are communicated in sequence to form a liquid pipeline. Through the design of the circulating liquid bath chamber and the liquid communicating pipe, the hydrogen absorption and heat release process and the hydrogen desorption and heat absorption process are mutually compensated, the heat utilization efficiency is improved, the external heating and cooling requirements are reduced, and the energy consumption in the hydrogen purification process is reduced.

The invention relates to the technical field of hydrogen storage, and provides a double-storage and double-release system based on hydrogen storage and phase change heat storage and a heat regulation and control method thereof.The double-storage and double-release system comprises a metal hydride hydrogen storage unit, a phase change heat storage unit and a heat regulation unit; a hydrogen storage heat conduction pipe is arranged in the metal hydride hydrogen storage unit, a heat storage heat conduction pipe is arranged in the phase change heat storage unit, and temperature sensors are arranged on the metal hydride hydrogen storage unit and the phase change heat storage unit. A heat exchange fluid medium is placed in the heat adjusting unit, and the heat adjusting unit is communicated with an inlet and an outlet of the hydrogen storage heat conduction pipe and an inlet and an outlet of the heat storage heat conduction pipe through a heat exchange medium conveying pipeline to form a closed pipeline. An electromagnetic valve is arranged on the heat exchange medium conveying pipeline, and the opening degree of the electromagnetic valve is adjusted according to the temperature detected by the temperature sensor so as to regulate and control the flow of the heat exchange fluid medium. The efficiency of thermal management in the hydrogen storage and release process is remarkably improved, and the applicability of the hydrogen storage and release device in different scenes is further enhanced.

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 magnesium-based metal hydride hydrogen storage system with the energy recovery function comprises an energy recovery device and a hydrogen storage tank, a first heat exchange pipe is installed in the energy recovery device, and the energy recovery device is filled with phase change heat storage materials; the hydrogen storage tank is filled with a magnesium-based hydrogen storage material, a second heat exchange pipe is arranged in the hydrogen storage tank, and heat conduction oil is filled in the second heat exchange pipe; an oil outlet of the second heat exchange pipe is connected with an oil inlet of the heating module through a first pipe set, an oil outlet of the heating module is connected with an oil inlet of the second heat exchange pipe through a second pipe set, and a circulating pump is installed on the second pipe set. The first pipe group is connected with an oil inlet of the first heat exchange pipe through a first branch pipe; the second pipe set is connected with an oil outlet of the first heat exchange pipe through a second branch pipe. By arranging the energy recovery device, energy released in the hydrogen absorption process can be recovered, energy is provided in the hydrogen desorption process, energy-saving and efficient hydrogen storage are achieved, and the operation stability of the hydrogen storage system is guaranteed.

The invention relates to a metal hydride solid hydrogen storage device, in particular to a detachable metal hydride solid hydrogen storage device which comprises a shell, a flange and a blind flange, a hydrogen conveying pipe and the flange are welded to the shell, the hydrogen conveying pipe serves as a hydrogen flow channel, a U-shaped heat exchange pipe and a temperature measuring protective sleeve are welded to the blind flange, and the U-shaped heat exchange pipe serves as the temperature measuring protective sleeve. Hydrogen is absorbed by introducing a hydrogen cylinder into a pipeline system through a pressure reducing valve and then entering a metal hydride solid hydrogen storage device through a hydrogen conveying pipe, so that a first-stage hydrogen absorption process can be completed; a reversible chemical reaction in the hydrogen absorption process is carried out in the forward direction to generate a large amount of heat, if the heat is not discharged in time, the further hydrogen absorption process of the hydrogen storage material can be influenced, at the moment, a certain flow of cooling water is introduced into the upper U-shaped heat exchange pipe by controlling a water path, and the heat generated in the hydrogen storage material is conducted to the wall of the heat exchange pipe through the aluminum annular fins on the heat exchange pipe; and the water is timely taken away by cooling water through convective heat exchange.

According to the metal hydride hydrogen compression device for the laboratory and the using method, in the scheme, when hydrogen filling is needed, an external hydrogen cylinder is connected with a hydrogen inlet connector, and hydrogen enters a booster jar through a one-way valve, the third end of a first three-way valve and a second three-way valve; a pressure sensor at the second three-way valve is used for detecting the pressure of gas in the pressurizing tank, hydrogen is absorbed by the hydrogen storage alloy powder after entering the pressurizing tank, and hydrogen filling of the device is completed; when the pressurizing tank needs to release hydrogen, the pressurizing tank is heated through the heating sleeve, the hydrogen storage alloy powder can release hydrogen, after the temperature and pressure in the pressurizing tank reach certain numerical values, the ball valve is opened, the hydrogen is connected with an external buffer tank through the second three-way valve, the second end of the first three-way valve and the hydrogen outlet connector, and hydrogen release of the device is completed.

Hydrogen storage system for passive discharge of hydrogen gas without employing heater, comprising a plurality of hydrogen storage tanks each containing at least one metal hydride (MH) storage material, a hydrogen gas flow circuit connected to the storage tanks and a control system including pressure sensors (P) and temperature sensors (T) arranged for measuring the pressure and temperature in each storage tank, the gas flow circuit comprising valves (V, V1, . . . Vn) coupling said plurality of storage tanks to an inlet, respectively an outlet of the hydrogen storage system, whereby the inlet and outlet may be common or may be separate. At least a first material storage tank comprises a first metal hydride (MH1) of a first composition and at least a second material storage tank comprises a second metal hydride (MH2) of a second composition.

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 high-temperature solid hydrogen storage and SOEC coupling hydrogen production and storage integrated system and method. The system comprises a water supply device, and the end of the water supply device is connected with a suction device; one end of the recovery device is connected with the suction device, and the other end is connected with a reaction device; the SOEC electrolytic reactor is connected with the reaction device, the SOEC electrolytic reactor comprises an anode end and a cathode end, and the anode end is connected with the recovery device; one end of the air delivery device is mounted between the reaction device and the SOEC electrolytic reactor, and the other end of the air delivery device is connected with a hydrogen high-temperature heat recovery device; the first end of the hydrogen medium-temperature heat recoverer is connected with the hydrogen high-temperature heat recovery device, the second end of the hydrogen medium-temperature heat recoverer is connected with the reaction device, the third end of the hydrogen medium-temperature heat recoverer is connected with a condenser, the fourth end of the hydrogen medium-temperature heat recoverer is connected with a dryer, and the condenser is connected with the dryer. Medium-temperature and high-temperature heat energy released in the hydrogen storage process of the high-temperature metal hydride is recycled through the heat recycling device and used for producing high-temperature superheated steam needed by SOEC electrolysis, and the good heat and mass synergistic effect is achieved on the whole.

A welded joint between a metallic connector and at least a metallic core of a metallic hydrogen separation membrane comprising a fusion weld formed from and between the metallic connector and at least the metallic core of the metallic hydrogen separation membrane, wherein the connector may be formed of a different metal or metal alloy to the metallic core of the hydrogen separation membrane, and wherein the fusion weld includes a sealing portion that provides a continuous seal between the metallic connector and at least the metallic core of the metallic hydrogen separation membrane and the weld metal of the sealing portion comprises less than 40% by mass of metal from the metallic core of the metallic hydrogen separation membrane.

The invention relates to a moderator element for a nuclear reactor, the moderator element comprises a shell and a core block, the core block is a metal hydride moderator and is packaged in the shell, and the shell is a ceramic shell or a metal shell and is composed of a shell body and a cover body which are connected in a sealed mode. The invention also relates to a preparation method of the moderator element for the nuclear reactor. According to the moderator element for the nuclear reactor, the shell is prepared through the additive manufacturing forming technology, then the heat treatment technology is combined, densified packaging of the moderator is achieved, the problems that the moderator is prone to oxidation and corrosion in the using process are solved, and the requirement of the advanced nuclear reactor type for the moderator is met.

The invention provides a multi-gas mixed supply type metal hydride hydrogen storage PCT testing device and method, and belongs to the technical field of hydrogen storage material performance detection. In the device, a hydrogen source and a carbon monoxide gas source in a gas mixed supply system respectively pass through a pressure reducing valve and a mass flow controller corresponding to the hydrogen source and the carbon monoxide gas source, and then pass through a first valve, a deoxidizing agent device and a dehydrating agent device to be connected with a main pipeline; the argon source is connected into the main pipeline through the pressure reducing valve and the second valve and used for calibrating the volume; the large gas supply tank is connected into the main pipeline through a third valve, and the small gas supply tank is connected into the main pipeline through a quick connector and a fourth valve; the vacuum pump is connected to the main pipeline through a fifth valve; a hydrogen storage alloy is placed in the sample chamber which is connected with the main pipeline through a sixth valve; a temperature control device is arranged outside the sample chamber; and the monitoring and control system is used for detecting and recording the gas pressure change and controlling and monitoring the temperature of the sample chamber. The device can accurately evaluate the hydrogen storage performance change of the hydrogen storage alloy under different poisoning conditions.

The invention belongs to the field of solid hydrogen storage reactors, and provides a hydrogen storage reactor and device based on phase change material and metal hydride partition arrangement. Wherein the hydrogen storage reactor comprises a hydrogen storage reactor body, a hydrogen inlet channel, an expansion area, a shell and a partition plate; the hydrogen inlet channel is used for introducing hydrogen; the expansion area is used for temporarily storing and uniformly distributing entering hydrogen and relieving pressure fluctuation and volume expansion of metal hydride at the same time; the hydrogen storage reactor body is divided into a plurality of areas by the partition plates; in the areas, the phase change materials and the metal hydrides are alternately arranged, so that reaction heat released by the metal hydrides in the hydrogen storage process is simultaneously transferred to the phase change materials in the adjacent areas through the two side wall surfaces in the areas to which the metal hydrides belong, and the effective heat transfer area is increased.

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 a multifunctional detection device and method for a hydrogen absorption and desorption process of a metal hydride, the multifunctional detection device is used for hydrogen absorption and desorption performance test, internal expansion stress test and external strain test, the multifunctional detection device comprises a stress sensor arranged in a hydrogen storage tank, and the sensing end of the stress sensor is flush with the inner surface of the hydrogen storage tank; the strain gauge is arranged on the periphery of the straight cylinder body between the upper and lower flanges of the hydrogen storage tank; the mass flow meter is arranged in the hydrogen absorption and desorption pipeline; the electric signal acquisition card is electrically connected with the stress sensor and the mass flow meter; the strain gauge is electrically connected with the strain gauges; the device has the following beneficial effects: the device can simultaneously monitor the real stress change process in the tank and the strain change process outside the tank in the hydrogen absorption process and the hydrogen desorption process of the metal hydride in the hydrogen storage tank and test the hydrogen absorption and desorption performance; and an accurate and efficient evaluation method is provided for manufacturing, filling and using safety of the metal hydride hydrogen storage tank.

The invention discloses a BOG recycling system for a liquid hydrogen refueling station, and relates to the technical field of liquid hydrogen refueling. Comprising a liquid hydrogen storage tank, a liquid hydrogen pump, a liquid hydrogen tank car, a liquid nitrogen tank, a gas-liquid separator, a condenser, a metal hydride hydrogen storage tank, a water tank, an inlet buffer tank, a hydrogen compressor, an outlet buffer tank, a hydrogenation machine, a hydrogen storage bottle set, a BOG pressurization pipeline, a liquid hydrogen filling pipeline, a circulation pipeline and a hydrogen recovery pipeline. According to the system, low-temperature hydrogen stored in the liquid hydrogen storage tank is used for liquefying nitrogen generated by pre-cooling to achieve circulation of liquid nitrogen, the metal hydride hydrogen storage tank is used for separating the nitrogen and the hydrogen generated by pre-cooling, meanwhile, the hydrogen releasing cold energy and the hydrogen generated by pre-cooling are conveyed to the hydrogen compressor, the hydrogen compressor is used for pressurizing, and the hydrogen is stored in the liquid hydrogen storage tank. The BOG enters a gas storage cylinder group to be stored or hydrogenated for a hydrogen energy automobile, so that the utilization efficiency of the hydrogen is improved, zero emission of the BOG is realized, and energy is saved.

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 present invention relates to the field of distributed energy supply technology, and provides a distributed energy supply system based on solid-gas coupled hydrogen storage and its working method. The photovoltaic panel provides electric energy for users through the first DC / AC converter, and provides electric energy for the electrolyzer through the first DC / DC converter; the electrolyzer generates hydrogen and oxygen, and transmits the hydrogen to the metal hydride solid hydrogen storage device and the hydrogen buffer tank; the metal hydride solid hydrogen storage device and the hydrogen buffer tank interact to supply hydrogen to the proton exchange membrane fuel cell; the proton exchange membrane fuel cell provides electric energy for users through the fourth DC / AC converter; heat exchange is carried out between the metal hydride solid hydrogen storage device and the proton exchange membrane fuel cell through water circulation. The hydrogen supply rate and process stability are improved, the waste heat in the distributed energy supply system is fully recovered and utilized, and the overall efficiency of the distributed energy supply system is 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 invention discloses intermetallic compound nanoparticles as well as a preparation method and application thereof, and relates to the technical field of synthesis of nano catalytic materials. The preparation method is a molten salt method, takes a metal source as a raw material of metal in intermetallic electron compound nanoparticles and takes a first metal halide as molten salt, and specifically comprises the following steps: mixing the metal source, the first metal halide and a reducing agent to obtain a mixture; the mixture is subjected to heat treatment, so that the first metal halide is molten, after heat preservation is conducted for preset time, the temperature is reduced to the room temperature at the preset cooling rate, and the intermetallic electron compound nano-particles are obtained; wherein the metal source comprises at least one of metal oxide, metal hydroxide and metal salt; the reducing agent comprises at least one of alkali metal, alkali metal hydride, alkaline earth metal and alkaline earth metal hydride. The molten salt method is adopted, the intermetallic electron compound nano-particles with the large specific surface area are prepared, the catalytic performance is improved, and meanwhile the method is simple, low in cost and high in yield and has universality.

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.

A heat exchanger incorporates a metal hydride heat exchanger and mitigates the fluid mixing process, and thus greatly improves the heat transfer efficiency and heat recovery processes. The metal hydride heat exchanger has a container for the metal hydride that has a large aspect ratio. A plurality of high aspect container for the metal hydride may be coupled with a manifold.