16results about How to "High hydrogen storage density" patented technology

The invention provides a double-layer adsorption type high-pressure hydrogen storage tank system and method, relates to the technical field of gas storage tanks, and aims to solve the problem that the hydrogen storage capacity is difficult to meet the requirements due to the fact that an existing hydrogen storage system adopts a single-layer structure, a hydrogen storage tank is configured to adopt a double-layer tank structure, and different types of adsorption materials are filled between an inner tank and an outer tank and in the inner tank respectively. According to the hydrogen storage system, relatively independent temperature and pressure regulation and control can be realized, so that the hydrogen storage effect is synergistically optimized, the hydrogen storage density is improved, the operation pressure of the hydrogen storage tank can be reduced, and the safety and economical efficiency of the hydrogen storage system are improved.

The invention discloses an SOFC-oriented multistage solid hydrogen storage system and method. The SOFC-oriented multistage solid hydrogen storage system comprises a gaseous hydrogen storage device and an air conveying device, the gaseous hydrogen storage device is connected with the SOFC and the combustion device through the hydrogen heat supplementing device; the air conveying device is connected with an air supply device, the end part of the air supply device is connected with an air heat compensation device through an air heat recovery device, and the air heat compensation device is connected with the SOFC; the hydrogen storage reactors are installed between the gaseous hydrogen storage device and the hydrogen heat supplementing device, the hydrogen storage reactors comprise a TiFe reactor, an Mg2Ni reactor and a TiH2 reactor, and the TiFe reactor, the Mg2Ni reactor and the TiH2 reactor are sequentially communicated. The system provides a safe, high-density and low-cost hydrogen storage function for the SOFC through integration of the SOFC and multi-stage solid hydrogen storage, high-temperature waste heat generated in the SOFC power generation process just provides a driving heat source for solid hydrogen storage and hydrogen desorption, and the defects in the prior art are overcome.

The invention discloses a jacketed cylinder type hydrogen storage reactor coupled with activated carbon and amino adsorption heat storage, which comprises a protective shell and a hydrogen storage body located in the protective shell, the hydrogen storage body is sleeved with a heat storage body, a metal wall is arranged between the heat storage body and the hydrogen storage body, a winding pipe is spirally wound on the outer wall of the heat storage body, and the outer wall of the winding pipe is sleeved with a metal sleeve. One end of the winding pipe is of a sealed structure, and the other end of the winding pipe penetrates through the protective shell; ammonia inlets and outlets are equidistantly formed in the contact part of the winding pipe and the outer wall of the heat storage body. The high hydrogen storage density can be achieved through the activated carbon, heat released by absorbing hydrogen can also be used for outer layer ammonia adsorption heat storage, the whole reactor only consumes energy in the ammonia gas conveying part, energy loss is reduced, the stability of the device is improved, and the low-energy-consumption operation mode is achieved. Activated carbon and amino adsorption energy storage are coupled, the heat transfer effect is enhanced, continuous hydrogen adsorption and desorption processes can be realized by charging and discharging ammonia gas and released energy, and the system is more flexible.

The invention belongs to the technical field of solid hydrogen storage, and particularly relates to a hydrogen storage alloy hydrogen absorption and desorption platform pressure and enthalpy change regulation and control method. The method comprises the steps that S1, hydrogen storage alloy is obtained through smelting, and the surface of the hydrogen storage alloy is polished; s2, the hydrogen storage alloy is placed in a high-temperature furnace, and the high-temperature furnace is cleaned; s3, a heating program of the high-temperature furnace is set, the initial temperature is room temperature, then the temperature is increased to 900-1400 DEG C at the heating rate of 100-300 DEG C / h, then heat preservation is conducted for 1-8 h, and then natural cooling is conducted; and S4, when the temperature in the high-temperature furnace is reduced to 30 DEG C or below, the hydrogen storage alloy is taken out, the hydrogen storage alloy is sequentially polished, cleaned and dried, and the regulated hydrogen storage alloy is obtained. By optimizing heat treatment parameters, the performance of the hydrogen storage alloy is remarkably improved, and the requirement for development of the hydrogen energy technology is met.

This invention provides a double-layer adsorption high-pressure hydrogen storage tank system and method, relating to the field of gas storage tank technology. Addressing the problem that current hydrogen storage systems using single-layer structures cannot meet demand, this invention configures a hydrogen storage tank with a double-layer structure. Different types of adsorption materials are filled between the inner and outer tanks, and within the inner tank, respectively. This allows for relatively independent temperature and pressure control, thereby achieving synergistic optimization of hydrogen storage performance, increasing hydrogen storage density, and reducing the operating pressure of the hydrogen storage tank, thus improving the safety and economy of the hydrogen storage system.

This disclosure relates to a method for storing and releasing hydrogen, the method comprising: pressurizing input hydrogen from a hydrogen source to obtain pressurized hydrogen; introducing the pressurized hydrogen into a solid hydrogen storage unit, wherein when the pressure of the input hydrogen is greater than a pressure threshold, the pressurized hydrogen is cooled to obtain first low-temperature hydrogen; introducing the first low-temperature hydrogen into the solid hydrogen storage unit; when the pressure of the input hydrogen is less than the pressure threshold, the pressurized hydrogen is heated to obtain high-temperature hydrogen; introducing the high-temperature hydrogen into the solid hydrogen storage unit; and discharging hydrogen from the outlet of the solid hydrogen storage unit; the solid hydrogen storage unit includes multiple solid hydrogen storage tanks internally filled with solid hydrogen storage material, and at least one solid hydrogen storage tank stores hydrogen. Using the method of this disclosure, flexible storage and release of hydrogen can be achieved, with high hydrogen storage density, stable hydrogen supply pressure, and a significant reduction in the footprint of hydrogen storage equipment.

The invention discloses an activation, hydrogen energy storage and power generation device based on a magnesium-based solid hydrogen storage material. The device comprises an activation unit, a hydrogen energy storage unit and a power generation unit, the activation unit is used for activating the hydrogen storage material, so that the material has higher hydrogen storage density, higher hydrogen absorption / desorption rate and better cycle stability; the hydrogen energy storage unit is used for storing hydrogen, and the hydrogen is stored in the magnesium-based solid hydrogen storage material to realize hydrogen energy storage; and the power generation unit is used for converting hydrogen energy into electric energy, releasing hydrogen in the hydrogen storage material, and realizing hydrogen-electricity conversion through chemical reaction of the hydrogen fuel cell. Hydrogen energy storage and hydrogen-electricity conversion can be conveniently and efficiently achieved, electricity is supplied to electric appliances, the problems that in an existing hydrogen storage technology, hydrogen storage performance is poor, safety is low, the size is large, transportation is inconvenient and the like are solved, and flexible electricity utilization of a terminal can be achieved.

The utility model discloses a vehicle-mounted hydrogen storage tank and belongs to the field of hydrogen storage and transportation. The vehicle-mounted hydrogen storage tank comprises a sealing shell and a hydrogen storage tank, wherein a cavity is formed in the sealing shell; the air guide pipes are arranged in the cavity; a hydrogen conveying channel is formed in the gas guide pipe, and a plurality of gas outlets are formed in the surface; the hydrogen input and output interface is communicated with the hydrogen conveying channel; wherein a plurality of solid hydrogen storage materials can be arranged on the gas guide tube in a penetrating manner to limit the radial and axial displacement of the gas guide tube. According to the vehicle-mounted hydrogen storage tank, the gas guide pipe is used as a limiting element and a gas transmission element, so that the abrasion between hydrogen storage media and between the hydrogen storage media and the buffering element can be reduced in the transportation process, the loss of the hydrogen storage media is avoided, the hydrogen charging and releasing speed can be improved, and the transportation is convenient and safe.

The invention relates to a preparation method of a boron-doped porous carbon-loaded potassium monatomic solid hydrogen storage material, which comprises the following steps: dissolving boric acid in a polyethylene glycol solution, stirring at room temperature until the boric acid is completely dissolved, adding porous carbon, fully stirring, standing and soaking at room temperature, and drying in vacuum to obtain a boron-doped porous carbon primary product; placing the boron-doped porous carbon primary product in a tubular furnace, heating at 900 DEG C for 3 hours under the protection of N2 atmosphere, and naturally cooling to obtain a boron-doped porous carbon material; and dispersing potassium chloride and the boron-doped porous carbon material in deionized water to obtain a potassium chloride-boron-doped porous carbon precursor dispersion liquid, carrying out centrifugal treatment, and carrying out heat treatment in a vacuum oven to obtain the boron-doped porous carbon-loaded potassium monatomic solid hydrogen storage material. The solid hydrogen storage material has the advantages that the prepared solid hydrogen storage material shows excellent hydrogen adsorption and desorption performance, when the hydrogen pressure is 70 Pa, the hydrogen adsorption capacity reaches 4.71 wt%, and the hydrogen storage density is greatly improved.

The application discloses a kind of solid hydrogen storage materials and preparation method thereof.The material is dense solid composite, by hydrogen production agent, non-noble metal boride catalyst and composite lithium cobalt oxide carrier is formed by pressure molding, and water can be supplied hydrogen.Hydrogen production agent is based on sodium borohydride or potassium borohydride;The carrier is modified composite lithium cobalt oxide, and has carrier and catalytic function.This application eliminates liquid solvent and porous support structure, builds synergistic catalytic system, to improve mass and volume hydrogen storage density, and ensure stable hydrogen production rate.Preparation method only involves solid phase mechanical mixing and pressing molding, and process is simple, suitable for large-scale production.The material has the characteristics of portable, safe, and can be used as an ideal hydrogen source, applied to hydrogen fuel cell and other fields.

The present invention belongs to the field of hydrogen storage alloys, and specifically discloses a single-phase AB3 superlattice hydrogen storage alloy and a preparation method thereof. The hydrogen storage alloy of the present invention has a single-phase AB3 type crystal phase structure, which is different from other multi-phase or single-phase A2B7, A5B 19 The hydrogen storage alloy has higher hydrogen storage capacity and cycle stability. The hydrogen absorption amount reaches more than 1.8wt.%, the effective hydrogen release amount reaches more than 1.7wt.%, and the capacity retention rate after 200 cycles reaches more than 95%.

This invention discloses a method for hydrogen production, storage, and refueling, comprising: S1, electrolyzing water to produce oxygen and hydrogen, with waste heat stored in a heat storage device; S2, the produced oxygen entering an oxygen storage tank, with waste heat stored in the heat storage device; S3, the produced hydrogen entering a first solid hydrogen storage material, with waste heat stored in the heat storage device; S4, when the first solid hydrogen storage material is full, hydrogen enters a second solid hydrogen storage material, with waste heat transferred to the first solid hydrogen storage material, enabling the first solid hydrogen storage material to refuel at a hydrogen refueling station; S5, when the second solid hydrogen storage material is full, hydrogen re-enters the first solid hydrogen storage material, with waste heat transferred to the second solid hydrogen storage material, enabling the second solid hydrogen storage material to refuel at a hydrogen refueling station; S6, repeating steps S4 and S5, until the reaction stops, the heat storage device transfers heat to the first and second solid hydrogen storage materials, causing them to release remaining hydrogen into the hydrogen refueling station. This invention achieves highly efficient hydrogen storage and refueling operations.

The invention belongs to the technical field of magnesium-based solid hydrogen storage, and particularly discloses a magnesium-based solid hydrogen storage system based on solar heating and a control method, and the magnesium-based solid hydrogen storage system comprises a gas control module, a hydrogen storage module, a heat preservation glass sealing cover, a support, a vacuum pump and an electric control module. The hydrogen storage module mainly comprises a hydrogen storage single tube and a Zijin tube, the hydrogen storage tube is filled with a magnesium-based solid hydrogen storage material, the Zijin tube sleeves the hydrogen storage single tube, the electronic control module monitors the system temperature and the hydrogen content in real time, the risk of hydrogen leakage is avoided, and the support supports the hydrogen storage module bundling device. According to the invention, solar energy is used for air-drying the Zijin tube, so that the temperature in the tube is increased, and the hydrogenation reaction condition of the magnesium-based solid hydrogen storage material is further achieved; compared with other hydrogen storage devices, the magnesium-based solid-state hydrogen storage system is free of any additional electric heating system, and the energy consumption of the magnesium-based solid-state hydrogen storage system is greatly reduced.