262 results about "Hydrogen desorption" patented technology

The invention provides a solid hydrogen storage thermal management system and method, and relates to the technical field of thermal management, and the system comprises a solid hydrogen storage module, a heating liquid storage module, a heat exchanger and a cooling module. The solid hydrogen storage module is composed of a plurality of solid hydrogen storage units connected in parallel, a first control valve and a second control valve. The heating liquid storage module comprises a liquid storage tank and a heater and is communicated with each solid hydrogen storage unit; and the cooling module comprises a water chilling unit and is used for cooling the medium flowing out of the liquid storage tank during hydrogen filling. And in the hydrogen charging and discharging operation, a control valve of the target solid hydrogen storage unit is opened, so that the target solid hydrogen storage unit, the heating liquid storage module and the heat exchanger form a communication loop. The heater heats the heat exchange medium to a first temperature range required by hydrogen desorption, and the water chilling unit cools the heat exchange medium to a second temperature range during hydrogen charging. The temperature of the solid hydrogen storage system can be effectively controlled in the hydrogen charging and discharging process.

The invention is suitable for the technical field of solid hydrogen storage, and provides a preparation method and application of a PCN-doped MOF derived nano-porous hydrogen storage composite material. The preparation method comprises the following steps: firstly, synthesizing a cobalt-nickel bimetallic MOF material, and introducing melamine polyphosphate and pentaerythritol ester in the synthesis process; introducing metal vanadium ions to obtain an MOF derivative, and calcining the MOF derivative to obtain the PCN-doped MOF derivative nano-porous hydrogen storage material. And compounding with magnesium hydride to obtain the V-Ni-Co / PCN + MgH2 hydrogen storage composite material. The hydrogen storage capacity of the prepared material reaches 7.0 wt% or above, rapid hydrogen absorption can be started at 40 DEG C, the dehydrogenation starting temperature is reduced to about 150 DEG C, rapid hydrogen absorption / hydrogen desorption is completed within 30 min and 45 min respectively, and excellent hydrogen storage thermal / dynamic performance is shown; after 100 times of hydrogen absorption and desorption cycles, the hydrogen storage capacity retention rate of the material is as high as 97%, and the material shows excellent cycle stability.

The invention discloses TiO2-x (F) powder, a preparation method thereof and application of the TiO2-x (F) powder in strengthening the performance of a solid hydrogen storage material, and belongs to the technical field of hydrogen storage materials and preparation of the hydrogen storage materials. The problems that an existing magnesium-based solid hydrogen storage material is high in hydrogen desorption temperature, slow in low-temperature dynamics and the like are solved. According to the preparation method, the fluorinated transition metal Ti oxide additive doped with the oxygen vacancies is prepared, electrons of Mg are captured by utilizing the strong electronegativity of F atoms on the surfaces of transition metal Ti atoms, MgF2 active catalytic species are generated in the hydrogen absorption and desorption process, and the hydrogen storage performance of MgH2 is further improved. Meanwhile, the construction of oxygen vacancies on the surface of the transition metal Ti atom can provide active sites for Mg / MgH2 nucleation growth, can greatly accelerate the flow of electrons in the hydrogen absorption / desorption process, improves the thermal / dynamic performance, and realizes the reversible hydrogen absorption / desorption of the magnesium-based hydrogen storage material at low temperature.

The invention relates to the field of solid hydrogen storage, in particular to a nanocrystalline vanadium-based hydrogen storage material as well as a preparation method and application thereof. The invention provides a method for simply preparing a nanocrystalline vanadium-based hydrogen storage material by a mechanical alloying method, and the preparation method comprises the following steps: 1, crushing vanadium: carrying out vacuum heat treatment on a vanadium block, and adding hydrogen pressure at room temperature to carry out hydrogenation crushing treatment; and 2, in an inert atmosphere, carrying out mixing and ball-milling reaction with an oxide to prepare the nanocrystalline vanadium-based hydrogen storage material. The nanocrystalline vanadium-based material is directly prepared in a ball milling mode, the preparation process and operation are simple, the production period is short, energy consumption is low, and the method is suitable for large-scale production. The nanocrystalline vanadium-based material only contains vanadium and hydrogen, the reversible hydrogen storage capacity is 1.6 wt% at the temperature of 50 DEG C, the hydrogen desorption platform pressure is 6.3 bar, and the capacity retention rate is 96% after 10 times of hydrogen absorption and desorption cycles at the temperature of 30 DEG C.

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 provides a solid hydrogen storage thermal management system and method, and relates to the technical field of thermal management, the system comprises a hydrogen charging and discharging module, a heating liquid storage module, a cooling liquid storage module, a loop switching module, a heat exchanger and a cooling module, the hydrogen charging and discharging module comprises a hydrogen storage unit, and the hydrogen storage unit is connected to a first control valve and a second control valve. The heating liquid storage module is composed of a heat liquid storage box and a heater and connected with the control valve. And the cooling liquid storage module comprises a cold liquid storage tank which is communicated with the control valve. The loop switching module utilizes the first control valve and the second control valve to switch heat exchange medium flow paths. The cooling module comprises a cooling unit. During hydrogen filling, the control valve is configured to form a first communication loop, and the heat exchange medium is cooled to the hydrogen filling temperature; and during hydrogen desorption, a second communication loop is formed, and the heat exchange medium is heated to the hydrogen desorption temperature. The temperature of the solid hydrogen storage system can be effectively controlled in the hydrogen charging and discharging process.

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 the technical field of purification, and discloses a hydrogen purification method based on a magnesium-based solid hydrogen storage material, which comprises the following steps: S11, packaging the magnesium-based solid hydrogen storage material into a plurality of purification units, connecting the two purification units in parallel, and arranging a thermal interaction unit between the two parallel purification units to form a primary purification module; and S2, purification: introducing the low-purity hydrogen into the purification module, so that the low-purity hydrogen is respectively subjected to a hydrogen absorption reaction and a hydrogen desorption reaction for multiple times in the purification units connected in parallel, the low-purity hydrogen is purified, heat is supplied to the purification units which are subjected to the hydrogen desorption reaction through the heat interaction unit, and heat energy released by the hydrogen absorption reaction is stored. Based on the selective adsorption capacity of the solid hydrogen storage material to hydrogen, the solid hydrogen storage material is used for adsorbing hydrogen and discharging impurity gas, so that the purity of hydrogen is improved, and the heat interaction unit is used for storing heat energy released by a hydrogen absorption reaction and applying the heat energy to a hydrogen desorption reaction, so that the energy consumption in the purification process is reduced.

The invention relates to an easily-activated Ti-Fe-Y-Mn-Zr-Co-Zn-based hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves at least one of the problems of high activation difficulty, long activation period, poor hydrogen absorption and desorption dynamic performance and the like of a Ti-Fe-based hydrogen storage alloy in the prior art. The invention provides a Ti-Fe-Y-Mn-Zr-Co-Zn based hydrogen storage alloy easy to activate, the chemical formula of the hydrogen storage alloy is Ti 1.15, Fe 0.8, Y 0.03, Mn 0.35-x-y-z ZrxCoyZnz, x, y and z are atomic ratios, x is larger than or equal to 0.05 and smaller than or equal to 0.15, y is larger than or equal to 0.02 and smaller than or equal to 0.1, and z is larger than or equal to 0.02 and smaller than or equal to 0.1. The Ti-Fe-Y-Mn-Zr-Co-Zn based hydrogen storage alloy provided by the invention obtains good activation performance and hydrogen absorption and desorption performance by means of component design and preparation process improvement, can be activated at one time under the conditions of 30 DEG C and 3 MPa, and has the hydrogen storage capacity of more than or equal to 1.69 wt.%, the hydrogen absorption platform pressure of more than or equal to 0.39 MPa and the hydrogen desorption platform pressure of more than or equal to 0.3 MPa.

The invention discloses a catalyst for a hydrogen storage material as well as a preparation method and application thereof, and belongs to the technical field of hydrogen storage materials and preparation thereof. The problems that an existing magnesium-based solid hydrogen storage material is high in hydrogen desorption temperature, slow in low-temperature dynamics and the like are solved. According to the invention, nickel chloride hexahydrate, polyether P123, polyether P127, dopamine hydrochloride, 1, 3, 5-trimethylbenzene and ammonia water are used as raw materials to prepare the catalyst which takes carbon as a carrier to wrap elemental Ni nanoparticles. The catalyst is applied to an Mg-based hydrogen storage material through a ball-milling method, and in the ball-milling mixing process, the carbon carrier can also serve as a grinding aid to inhibit Mg powder agglomeration and promote better combination between Mg and Ni, and meanwhile, the cycle performance of Mg powder hydrogen storage is improved. Mg2NiH4 / Mg2Ni generated in situ in the hydrogen absorption and desorption process inherits the superfine size and uniform dispersity of Ni nanoparticles, and shows high activity in the hydrogen absorption and desorption cycle of Mg.

The invention relates to a Y-doped Ti-Mn-based solid hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and has the advantages of easiness in activation, high hydrogen absorption and desorption speed, moderate hydrogen absorption and desorption plateau pressure and long cycle life. The invention provides a Y-doped Ti-Mn-based hydrogen storage alloy, which is characterized in that the chemical general formula of the hydrogen storage alloy is Ti1-x-yYxZryMn2-w-vVwFev, in the formula, x, y, w and v represent atomic ratios, 0.02 < = x < = 0.08, 0.05 < = y < = 0.15, 0.3 < = w < = 0.5, and 0.1 < = v < = 0.2. The hydrogen storage alloy is excellent in hydrogen storage performance and can be completely activated by absorbing hydrogen for the first time under the conditions of 25 DEG C and 3 MPa, the hydrogen storage capacity is larger than or equal to 1.90 wt%, the hydrogen absorption plateau pressure is larger than or equal to 0.35 MPa, the hydrogen desorption plateau pressure is smaller than or equal to 0.26 MPa, and the hydrogen absorption retention rate of the alloy is larger than or equal to 97.52% after the alloy is cycled for 1000 times.

The invention discloses a lattice distortion and entropy value-based high-entropy alloy screening method, which comprises the following steps of: firstly, simultaneously calculating the lattice distortion degree and entropy value of a high-entropy alloy, and then determining the components of the high-entropy alloy meeting the requirements according to the screening requirements; according to the Hume-Rother alloy solid solution theory, the lattice distortion degree is calculated; the lattice distortion degree must be greater than or equal to 8.7%, and the upper and lower limit difference must be greater than or equal to 2.0%; entropy calculation is carried out based on the statistical definition of the concept of mixed entropy in statistical mechanics; the entropy value must be greater than or equal to 1.5 R. The obtained TiFeMnCoVZr high-entropy alloy only contains a Laves phase, and when the TiFeMnCoVZr high-entropy alloy is used as a magnesium hydride hydrogen storage material, the maximum hydrogen absorption amount can reach 4.7 wt.%, the maximum hydrogen desorption amount is 4.6 wt.%, and the hydrogen desorption activation energy is 68.9 kJ / mol.

The invention belongs to the technical field of hydrogen storage, and particularly relates to a vehicle-mounted hydrogen storage device and a hydrogen absorption and desorption method thereof. A vehicle-mounted hydrogen storage device comprises a hydrogen storage reactor arranged in a vehicle-mounted high-pressure container and filled with vanadium-based hydrogen storage alloy; the refrigerating system is used for providing a first fluid medium for the solid hydrogen storage reactor in a hydrogen absorption process so as to cool the hydrogen storage reactor to a preset hydrogen absorption temperature; the heating system is connected with a waste heat source of a vehicle-mounted engine and used for providing a second fluid medium for the hydrogen storage reactor in the hydrogen desorption process so as to heat the hydrogen storage reactor to the preset hydrogen desorption temperature; and the fluid conveying loop comprises a pipeline and a valve and is used for selectively communicating the refrigerating system or the heating system with the hydrogen storage reactor so as to convey the first fluid medium or the second fluid medium.

The invention relates to a solid hydrogen storage bottle with an internal heat exchange coupling heat pipe, which comprises a bottle body, a heat conduction part and a gas guide part, the heat conduction part is movably arranged in the bottle body, and a material storage cavity is formed in the bottle body; the air guide part keeps the material storage cavity communicated with the outside of the bottle body in the moving process; wherein the gas guide part synchronously moves along with the heat conduction part, and the heat conduction part keeps the hydrogen absorption material deviating from the gas guide part in the static process. The heat conduction part is movably arranged in the bottle body, so that when the heat conduction part moves, the hydrogen absorption material is thrown away from the gas guide part, the material cannot escape outwards, smooth flowing of hydrogen is kept, the number of the storage cavities is not limited by the structure, the multiple storage cavities can be arranged, the hydrogen absorption material is fully separated, and the hydrogen absorption effect is improved. And the whole structure keeps a good heat conduction effect on the hydrogen absorption material, and meanwhile, sufficient flow of hydrogen between the inside and the outside is ensured, so that the hydrogen absorption and hydrogen desorption efficiency is effectively ensured.

The utility model discloses a hydrogen storage and supply device and a hydrogen fuel cell heat and power cogeneration system, and relates to the technical field of fuel cells. The hydrogen storage and supply device realizes normal-temperature and normal-pressure storage of hydrogen on the basis of a liquid organic matter hydrogen storage technology, and the principle is that hydrogen storage is realized by virtue of reversible reaction and hydrogenation reaction of unsaturated liquid organic matters such as olefin, alkyne or aromatic hydrocarbon and hydrogen, and hydrogen release is realized by virtue of dehydrogenation reaction. According to the liquid organic matter hydrogen storage technology, the hydrogen storage density is 5%-10%, and the hydrogen storage amount is large; and the hydrogen storage carrier is a liquid organic matter, normal-temperature and normal-pressure transportation can be achieved, convenience and safety are achieved, the requirement for the hydrogen liquid tank is low, and hydrogen leakage is basically avoided during transportation. And during dehydrogenation reaction, the temperature required by hydrogen desorption is low, the energy consumption is low, the hydrogen desorption rate is adjustable, and the hydrogen desorption device can be adapted to various hydrogen fuel cells. The hydrogen fuel cell heat and power cogeneration system collects and utilizes the lost heat of the cell, so that the comprehensive utilization rate of the hydrogen fuel cell is improved.

The invention discloses a magnesium-based solid hydrogen storage tank integrated with a resistance heating and electromagnetic coupling magnetic field structure, which comprises a tank body and a control cabinet integrated on the outer side wall of the tank body, a plurality of electrode plates are arranged in the tank body, and the electrode plates are electrically connected with a power supply cabinet on the side wall of the tank body through tabs on the electrode plates. The inner space of the tank body is divided into a plurality of hydrogen storage spaces by the plurality of electrode plates, magnesium-based solid hydrogen storage materials containing magnetic alloy metal and carbon materials are added into the hydrogen storage spaces through material adding ports formed in the outer side wall of the tank body, a temperature sensor is arranged in each hydrogen storage space, and a pressure sensor is arranged at the top of the tank body; a hydrogen inlet / outlet is formed in the top end of the tank body; a communicating hole for communicating two adjacent hydrogen storage spaces is formed in the center of the electrode plate. Through the synergistic effect of an electric field and a magnetic field, the thermal management performance of the magnesium-based hydrogen storage material is effectively improved, the hydrogen desorption cold start time is shortened, the thermal effect influence in the hydrogen charging and desorption process is reduced, stress concentration caused by volume expansion is relieved, and the hydrogen storage and release performance of the magnesium-based material is improved.

The invention provides a catalyst for a hydrogen storage material as well as a preparation method and application of the catalyst. The catalyst for the hydrogen storage material comprises a CeO2 nanorod and a transition metal nanocluster loaded on the CeO2 nanorod, the transition metal nanocluster comprises any two of a Ni element, a Pd element, a Co element or a Mn element. According to the catalyst for the hydrogen storage material, the CeO2 nanorods and the transition metal nanoclusters can form strong metal-carrier interaction, and the hydrogen storage dynamic performance of the MgH2 material can be synergistically improved; meanwhile, the transition metal nanocluster with the two elements can effectively improve the hydrogen absorption / desorption performance of MgH2. Therefore, by compounding the catalyst with an MgH2 material, the hydrogen desorption temperature of MgH2 can be reduced, the hydrogen absorption / desorption dynamic performance of MgH2 can be improved, and the cycle performance can be 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 provides a PdRh alloy coated cuprous oxide nanorod array bifunctional catalyst as well as a preparation method and application thereof. According to the preparation method disclosed by the invention, foamy copper is subjected to chemical oxidation treatment, then the foamy copper and a mixed solution of PdCl2 and RhCl3 are subjected to co-heating and redox reaction to obtain the cuprous oxide nanorod array bifunctional catalyst wrapped by the PdRh alloy, and the catalyst has a synergistic effect of PdRh alloy doping and Cu0 / Cu < + >; the catalyst can efficiently promote furfural molecular adsorption, C-H bond breakage and hydrogen desorption in furfural oxidation and hydrogen evolution reaction, can be used as an excellent bifunctional catalyst material for low-potential furfural oxidation and hydrogen evolution reaction, has excellent electrocatalytic activity and stability for low-potential furfural oxidation and hydrogen evolution reaction, and can be used as a catalyst for low-potential furfural oxidation and hydrogen evolution reaction. And a low-energy-consumption bipolar hydrogen production system can be constructed by coupling low-potential furfural oxidation and hydrogen evolution reaction. The preparation method disclosed by the invention is simple, convenient, feasible, economical, practical and suitable for large-scale industrial production.

The invention discloses a hydrogen trap characteristic parameter determination method based on a genetic algorithm, and relates to the technical field of hydrogen trap characteristic calculation. Placing the sample in a hydrogen filling device for hydrogen filling treatment, wherein the hydrogen concentration in the sample is saturated; transferring the sample into a heating thermal desorption device for hydrogen desorption treatment, collecting overflowed hydrogen through a mass spectrometer to obtain an actually measured TDS curve, and analyzing the category number of hydrogen traps in the material; according to the McNabb and Foster theories, in combination with an Oriani hypothesis, a calculated TDS curve is obtained; establishing an error function between the actually measured TDS curve and the calculated TDS curve; and according to the error function, a genetic algorithm is adopted to invert and solve the concentration and binding energy of various hydrogen traps. The method can accurately predict the concentration of various hydrogen traps in the material and the characteristic parameters of binding energy, and provides technical support for hydrogen embrittlement prevention design, safety evaluation and the like of steel for hydrogen energy storage and transportation equipment.

The invention discloses a solid hydrogen storage tank and a hydrogen storage system, and the solid hydrogen storage tank comprises a hydrogen storage tank body which is provided with a hydrogen feeding port and a hydrogen discharging port and is internally provided with a hydrogen storage alloy; the fixed base is provided with a placing groove, and the bottom of the hydrogen storage tank body is embedded into the placing groove; the cooling module at least comprises a cooling coil, and the cooling coil is arranged at the bottom of the containing groove; and the heating module at least comprises a heating pipe, and the heating pipe is coiled on the peripheral wall of the hydrogen storage tank body. The cooling module is arranged at the bottom of the hydrogen storage tank body, and the heating pipe is wound on the outer wall of the hydrogen storage tank body. The cooling module and the heating module can be used for controlling the hydrogen storage alloy in a corresponding temperature environment according to requirements, so that the effects of hydrogen absorption and hydrogen desorption are achieved. The heating module is used for heating, the cooling module is used for cooling, the temperature control process is faster, temperature control is more accurate, the temperature adjusting efficiency is improved, and then the hydrogenation and hydrogen desorption efficiency is improved.

An efficient low-energy-consumption solid hydrogen storage and desorption system comprises hydrogen storage modules, hydrogen desorption modules and a control module, and the number of the hydrogen storage modules and the number of the hydrogen desorption modules can be adjusted according to the requirements of the external hydrogen storage amount and the external hydrogen desorption amount. The heat exchange module is used for providing heat and cold for the hydrogen storage module and the hydrogen release module, and the heat exchange modes of the heat exchange module are diversified and adjustable; the pressurization module is used for adjusting the pressure of the hydrogen storage module in the hydrogen storage process. According to the invention, hydrogen produced by electrolyzing water and hydrogen provided by other low-pressure hydrogen sources can be pressurized and then subjected to solid hydrogen storage, and an external hydrogen source with pressure can be directly subjected to solid hydrogen storage, so that the hydrogen storage modes are diversified. The system further provides a heat exchange module with a temperature adjusting function, a heater direct heating mode can be adopted, a heat exchange mode can also be adopted to utilize low-grade energy, comprehensive energy consumption is reduced, and energy conservation and emission reduction are achieved. The invention relates to an efficient low-energy-consumption solid hydrogen storage and desorption system suitable for hydrogen filling of a pressure-free or low-pressure hydrogen source.

The invention provides an extended-range solid hydrogen storage hydrogen fuel cell hydrogen thermal coupling power system, which comprises a proton exchange membrane hydrogen fuel cell power generation module used for converting hydrogen and oxygen into electric energy through electrochemical reaction; the alloy solid hydrogen storage and supply module is used for storing hydrogen in a low-pressure safe and high-density manner, releasing heat during hydrogen charging and exchanging heat with external cooling fluid; heat is absorbed during hydrogen desorption and exchanges heat with waste heat of the hydrogen fuel cell, so that hydrogen-heat coupling in the hydrogen supply process is realized; and the hydrogen thermal coupling thermal management module is used for transferring waste heat of the fuel cell to the solid hydrogen storage device so as to support the hydrogen desorption and heat absorption process of the solid hydrogen storage device. The technical problem of alloy solid hydrogen storage in hydrogen supply stability is solved, gas hydrogen can be stably and rapidly supplied to a fuel cell under the working conditions of vehicle starting, climbing or rapid power increasing and the like, power output stability of a system is maintained, and the strict requirement of the traffic power field for power performance is met.

The invention relates to a hydrogen ore carrier gas-solid two-phase conversion method which is suitable for a gas-solid two-phase conversion device containing a hydrogenation container and a hydrogen desorption container. The hydrogenation container is provided with a first heat preservation container and a first pipe group and is provided with a feeding port and a discharging port; the hydrogen releasing container comprises a second heat preservation container, a second pipe set, a feeding port, a discharging port and a hydrogen collecting pipeline. The method comprises the following steps: placing a solid hydrogen storage carrier to be loaded in a hydrogenation container, heating, introducing hydrogen, and introducing cooling water after complete absorption; and putting the full-load solid hydrogen storage carrier into a hydrogen releasing container, heating to promote the hydrogen to be discharged, releasing the hydrogen after the hydrogen is completely discharged, and introducing cooling water to complete conversion. Accurate temperature control is realized by adopting rapid heating of superheated steam and timely cooling of cold circulating water; and the heat source is adaptive to various hydrogen storage carriers. Hydrogenation and hydrogen desorption are carried out in different containers, cross contamination is prevented, and efficient process is guaranteed. The metal small-particle hydrogen storage carrier is large in specific surface area, and the hydrogen storage efficiency is improved. A steam heat source is quick in heat transfer, good in temperature control, shortened in reaction period and beneficial to industrial application.

The invention relates to the field of solid hydrogen storage materials, in particular to a method for improving the hydrogen storage performance of MgH2 on the basis of catalysis of graphene oxide loaded green sulfur stone. According to the preparation method, a GO (at) VS4 nano-particle composite material catalyst is synthesized through a hydrothermal method assisted by ionic liquid chlorinated 1-butyl-3-methylimidazolium salt ([BMIm] Cl), and then GO (at) VS4 doped MgH2 is prepared through a ball milling method. According to the present invention, the prepared transition metal sulfide catalyst cupredite has unsaturated d electrons and high conductivity, the graphene oxide loaded cupredite (GO (at) VS4) catalyst is introduced into MgH2, such that the kinetic stability and the cycle stability of the hydrogen absorption and desorption reaction of MgH2 can be effectively improved, the hydrogen desorption kinetic activation energy of MgH2 is reduced to 63.8 kJ / mol from 122.7 kJ / mol, and the mass hydrogen desorption capacity remains unchanged after 100 cycles. The preparation process is simple, has low requirements on equipment, is easy to operate and has a commercial application prospect.

The invention discloses a hydrogen desorption performance measuring and calculating method and system of a solid hydrogen storage device and a fuel cell. The hydrogen desorption performance measuring and calculating method of the solid hydrogen storage device comprises the steps that S1, the real-time relative hydrogen storage amount HSOC of the solid hydrogen storage device is calculated according to the real-time hydrogen desorption amount integral QH2 (t); s2, according to the real-time relative hydrogen storage amount HSOC and the static available hydrogen amount eHSOP, calculating the dynamic available hydrogen amount dHSOP of the solid hydrogen storage device according to the following formula: dHSOP = f (HSOC, THSx) * eHSOP, wherein f (HSOC, THSx) is an available hydrogen desorption capacity table of the solid hydrogen storage device under the current water temperature THSx and the current real-time relative hydrogen storage amount HSOC, and the static available hydrogen amount eHSOP is the relative percentage of the designed hydrogen desorption capacity; and S3, looking up a table according to the dynamic available hydrogen amount dHSOP to obtain a dynamic hydrogen desorption capacity power limit value FCSPPwrReqLmtdHSOP. According to the method, the available hydrogen amount and the hydrogen desorption capacity of the solid hydrogen storage device are obtained through real-time calculation, and compared with a static table look-up mode, the accuracy of estimating the hydrogen desorption performance of the solid hydrogen storage device is improved.

The invention relates to a Ti-Fe-Ce-Mn-Zr-Al-Co-based hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves at least one of the problems of high activation condition, long activation period, poor hydrogen absorption and desorption performance and the like of the traditional TiFe hydrogen storage alloy in the prior art. The invention provides a Ti-Fe-Ce-Mn-Zr-Al-Co-based hydrogen storage alloy which is characterized in that the specific composition of the alloy is Ti < 1.05 > Ce < 0.05 > Fe < 1.15-x-y-z-m > Mn < x > Zr < y > Al < z > Com, x, y, z and m are atomic ratios, x is larger than or equal to 0.1 and smaller than or equal to 0.25, y is larger than or equal to 0.05 and smaller than or equal to 0.2, z is larger than or equal to 0.02 and smaller than or equal to 0.1, and m is larger than or equal to 0.02 and smaller than or equal to 0.1. The hydrogen storage alloy has good activation performance and hydrogen absorption and desorption performance, the hydrogen storage capacity is larger than or equal to 1.70 wt.%, the hydrogen absorption plateau pressure is larger than or equal to 0.41 MPa, and the hydrogen desorption plateau pressure is larger than or equal to 0.31 MPa; activation can be completed at a time under the conditions that the temperature is 30 DEG C and the initial hydrogen pressure is 3 MPa, and the solid hydrogen storage material can be widely applied to hydrogen fuel cells and other scenes as a solid hydrogen storage material.

The utility model provides a solid hydrogen storage system, which comprises a hydrogen storage module, a waste heat recovery module and a waste heat export module, and the hydrogen storage module is respectively connected with a hydrogen source and a user side and is used for storing and releasing hydrogen; the waste heat recovery module is connected to the hydrogen storage module and can recover heat released in the hydrogen filling stage and store the heat through a heat storage working medium. The waste heat leading-out module is connected to the waste heat recovery module, heat stored by the waste heat recovery module is released and utilized, the waste heat leading-out module can be connected with the hydrogen storage module to serve as a heat source in the hydrogen desorption stage, and the waste heat leading-out module can also be connected with other systems with heat energy requirements. Waste heat in the hydrogen charging process is recycled, energy waste is avoided, efficient utilization of energy is achieved through system circulation, the conversion efficiency of a fuel cell can be fully exerted, good market applicability is achieved, the stored waste heat can serve as a heat source to be used for various ways, and the system is simple in overall structure, low in cost, high in practicability and suitable for popularization and application. The application range is wide.

The invention provides a hydrogen engine energy management system based on an organic liquid hydrogen carrier and a vehicle. The hydrogen engine energy management system comprises an engine system, an aftertreatment system and a hydrogen supply system. The after-treatment system is communicated with the engine system, and the hydrogen supply system is respectively communicated with the engine system and the after-treatment system; the hydrogen supply system comprises a multiple heat exchange circulation main path, and the multiple heat exchange circulation main path comprises a preheating pipeline and an auxiliary heating pipeline which communicate with each other; an oil storage tank is arranged on the preheating pipeline, and hydrogen liquid is stored in the oil storage tank; the hydrogen supply system and the engine system share part of the preheating pipeline, so that hydrogen liquid flows through a cylinder cover and a cylinder body on the engine system through the preheating pipeline and exchanges heat with the cylinder cover and the cylinder body to preheat the hydrogen liquid and cool the engine system at the same time. By means of the system, the problem that an existing engine energy management system is difficult to couple heat output of an engine with the heat requirement in the hydrogen desorption process is solved.

The invention is applicable to the technical field of solid hydrogen storage, and provides an Mg2FeH6-coated MCM-41 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing MCM-41, then synthesizing Mg / Fe-MOF on an MCM-41 molecular sieve in situ, and carbonizing and hydrogenating to obtain the Mg2FeH6-coated MCM-41 composite material. The prepared material shows excellent hydrogen storage performance under the conditions that the temperature is 300 DEG C, the hydrogen absorption pressure is 3 MPa and the hydrogen desorption pressure is 0.2 MPa, the maximum hydrogen absorption capacity reaches 12.8 wt%, and the maximum hydrogen desorption capacity reaches 12.6 wt%; the Mg2FeH6-coated MCM-41 prepared by taking MOF as a template has the advantages of nanocrystallization structure and high specific surface area, provides a rapid hydrogen transmission channel, improves the hydrogen storage performance of the material, and shows good reversibility; the method is simple in process and suitable for large-scale production.