192results about "Reversible hydrogen uptake" patented technology

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 discloses a multi-hydrogen-storage-tank solid hydrogen storage system based on temperature control, and relates to the technical field of hydrogen energy storage, and the key points of the technical scheme are that the system comprises a plurality of hydrogen storage tanks, each hydrogen storage tank adopts different types of alloy hydrogen storage materials, each hydrogen storage tank is provided with an independent temperature control system, and the temperature is adjusted according to the types of the hydrogen storage materials; therefore, the hydrogen storage efficiency is optimized. The system can accelerate the hydrogen storage rate and improve the storage density through temperature control, the heat exchange device is arranged to improve the heat energy management efficiency, and accurate temperature control and cycle counting functions are achieved. The service life of the hydrogen storage material can be effectively prolonged, performance degradation is reduced, and the long-term stability of a hydrogen storage system is improved.

1.1 Storage system for the storage and transport of hydrogen, based on hollow microspheres in whose closed shells metal particles are embedded, which can be heated inductively. 2.1. Various hydrogen storage and transport systems exist, which either have limited storage capacities or require significant energy input, and are therefore generally not economically viable for a broad hydrogen economy. The new system aims to provide large storage capacities with the lowest possible energy consumption. 2.2. The storage system is characterized by the fact that metal, metal alloy, or metal composite particles are embedded in the closed shells of hollow microspheres, which can be inductively heated, thus allowing rapid hydrogen permeation into and out of the hollow spheres even at low temperatures during the loading and unloading process. 2.3. Hydrogen storage and transport system.

The present invention introduces novel methods and procedures to establish optimal conditions for ENERGY PRODUCTION, ensuring that the process is both reproducible and controllable. These methods utilize extremely strong electric fields that exists at the INTERFACE area between PRIMARY SOLIDs and SECONDARY SOLIDs that each have different work function values. Prescribed types of solids, having the highest work function values, allow absorbed HYDROGEN atoms to migrate to the INTERFACE area, followed by the ionization of HYDROGEN atoms within this area. The strong electric field will concentrate HYDROGEN ions in an extreme high density at the INTERFACE area. Preferred methods include the use of PRIMARY SOLIDs whose work function value is increased by the absorption of HYDROGEN, applying additional STIMULI and implementing fully enclosed INTERFACE areas. Increased work function values and / or additional STIMULI further improve the ionization and accumulation of HYDROGEN ions. Escape of accumulated HYDROGEN ions from the INTERFACE area is prevented by a suitable FULLY ENCLOSED INTERFACE area, safeguarding that accumulation of ions continues until the required threshold density of HYDROGEN ions is surpassing the required threshold density to initiate and maintain ENERGY PRODUCTION.

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 aims to provide a solid hydrogen storage hydrogen closed cycle hydrogen source generator for an underwater vehicle, which belongs to the field of dehydrogenation devices and comprises a reactor, a pressure stabilizing common rail pipe, a hydrogen storage material delivery pump, a solid hydrogen storage material storage unit, a solid hydrogen storage material spraying device, a product collecting device and a hydrogen storage unit. The hydrogen storage material conveying pump is connected with the pressure stabilizing common rail pipe, the solid hydrogen storage material storage unit and the solid hydrogen storage material spraying device, the hydrogen storage unit is connected with the pressure stabilizing common rail pipe, and the reactor is connected with the hydrogen storage unit. The solid hydrogen storage material is used for releasing hydrogen, one part of hydrogen is conveyed to the fuel cell to react for power output of the underwater vehicle, the other part of circulating hydrogen assists the hydrogen storage material in injection, and an underwater closed circulation mode suitable for the underwater vehicle is achieved. The solid hydrogen storage material conveying module and the circulating hydrogen supply module are matched, and rapid mixing of the solid hydrogen storage material and hydrogen and large-flow injection of the solid hydrogen storage material are achieved.

The present invention discloses a preparation method of a graphite-like carbon nitride-yttrium-stabilized zirconium oxide composite hydrogen barrier coating. First, a low-carbon steel substrate is pretreated to obtain a pretreated substrate; then zirconium n-propyl alcohol, n-propyl alcohol, acetylacetone and yttrium nitrate are mixed and reacted, aged to obtain a yttrium-stabilized zirconium oxide sol; the sol is coated on the pretreated substrate and dried, and the coating, drying and repeated treatments are followed by pre-sintering, followed by repeated coating, drying, and finally heat treatment to obtain a yttrium-stabilized zirconium oxide coating YSZ; melamine and thiourea are mixed, calcined and ground to obtain powdered graphite-like carbon nitride g-C3N4; finally, g-C3N4 powder and a coating coated with YSZ are sintered to obtain a graphite-like carbon nitride-yttrium-stabilized zirconium oxide g-C3N4 / YSZ composite coating. The hydrogen barrier coating prepared by the present invention can solve the problem that hydrogen embrittlement is prone to occur when current steel equipment is used in a hydrogen environment, and improve the safety of steel equipment during hydrogen energy utilization.

The invention relates to a power supply system comprising a modular combination of a hydrogen generation unit, a hydrogen usage unit and a control or regulation unit for controlling or regulating the operation of the hydrogen generation unit and the hydrogen usage unit.

The invention relates to a niobium-based MXene catalyst for lithium borohydride hydrogen storage as well as preparation and application of the niobium-based MXene catalyst. The expressions of the niobium-based MXene catalyst are Nb2C and TiNbC MXene respectively. The preparation method comprises the following steps: dissolving Nb2AlC MAX in a hydrofluoric acid solution, dissolving TiNbAlC MAX in a mixed solution of hydrogen chloride and lithium fluoride, cleaning and drying to obtain Nb2C and TiNbC MXene with layered structures. According to the preparation method of the niobium-based MXene catalyst for lithium borohydride hydrogen storage, Nb2C of a layered structure, TiNbC MXene and lithium borohydride are mixed and prepared by adopting a high-energy ball milling method, a LiBH4 + xwt% Nb2C composition and a LiBH4 + xwt% TiNbCTx composition are synthesized, the preparation method of the niobium-based MXene catalyst for lithium borohydride hydrogen storage has high catalytic performance, and the hydrogen desorption performance of lithium borohydride is remarkably improved.

The invention discloses a nickel-based ammonia decomposition catalyst as well as a preparation method and application thereof. The nickel-based ammonia decomposition catalyst comprises a carrier, an active component and an auxiliary agent, the active component is loaded on the carrier, and the auxiliary agent is loaded on the carrier containing the active component; the active component comprises an active component I and an active component II; the active component I is Ni, and the active component II is selected from Fe and / or Co; the auxiliary agent is alkali metal oxide; alkali metal in the alkali metal oxide is selected from at least one of Li, Na, K, Rb and Cs. Compared with the nickel-based catalyst used in the industry at present, the catalyst prepared by the method provided by the invention shows higher catalytic activity and stability in ammonia decomposition reaction, and the ammonia decomposition temperature can be reduced by 150-200 DEG C. When the gas production rate is the same, the loading amount of the catalyst and the equipment volume are greatly reduced, and the ammonia decomposition energy consumption is obviously reduced.

The present invention introduces novel methods to establish optimal conditions for the PRODUCTION OF ELECTRICITY. These methods utilize extremely strong electric fields at the INTERFACE areas between primary and secondary solids with different work function values. Prescribed high-work-function solids absorb HYDROGEN atoms, which ionize in the INTERFACE area. The strong electric field concentrates HYDROGEN ions in a high density at the INTERFACE. Preferred methods involve increasing the work function of primary solids by absorbing HYDROGEN, thereby strengthening the electric field at the INTERFACE. This high density of HYDROGEN ions at the INTERFACE causes HYDROGEN ions to escape from the surface of the composition of PRIMARY SOLIDs and SECONDARY SOLIDs, creating an abundance of electrons. Escaping HYDROGEN ions recombine at the surface of a suitable CATALYST, reducing the number of electrons in the CATALYST and establishing a potential difference between the composition of PRIMARY SOLIDs and SECONDARY SOLIDs and the CATALYST. An IMPEDANCE between these potentials enables electrons to establish electrical equilibrium, thereby transforming the composite and its associated process into a source of electricity. In the absence or presence of a high IMPEDANCE, a substantial potential difference is established. Discharge reactions occur under the appropriate conditions, emitting light that can serve as a light source or generate additional electrical energy through electrochemical cells.

The invention relates to the technical field of hydrogen-powered aircrafts, and particularly provides a hydrogen-powered aircraft and a composite solid hydrogen storage system, the hydrogen-powered aircraft comprises an aircraft body, a hydrolysis hydrogen production unit, a solid hydrogen storage and supply unit, a heat exchange system and a hydrogen engine; the hydrolysis hydrogen production unit and the solid hydrogen storage and supply unit are arranged in the machine body; the hydrolysis hydrogen production unit is used for reacting with water to generate hydrogen and storing the hydrogen into the solid hydrogen storage and supply unit; the solid hydrogen storage and supply unit is used for storing the hydrogen generated by the hydrolysis hydrogen production unit and outputting the hydrogen to a hydrogen engine in a controllable manner; the heat exchange system is arranged in the machine body, wraps the solid hydrogen storage and supply unit and is used for heating the solid hydrogen storage and supply unit after gas exhausted by the hydrogen engine is mixed with air so as to control the solid hydrogen storage and supply unit to release hydrogen; and the generated condensed water is supplied to the hydrolysis hydrogen production unit. According to the invention, reactants and energy can be provided for the hydrolysis hydrogen production unit and the solid hydrogen storage and supply unit, so that the hydrogen storage mass density is improved.

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 discloses a metal oxide / carbon / nickel composite material, a preparation method and application of the metal oxide / carbon / nickel composite material to a magnesium-based hydrogen storage material, and belongs to the field of hydrogen storage energy. The problems that a single-component catalyst in the MgH2 hydrogen storage material is low in active site, the interface is inactivated in the circulation process and the like are solved. A metal nickel source and a cerium source are combined with an organic ligand trimesic acid to form bimetal MOF, CeO2 / C / Nix obtained after calcination inherits the high specific surface area of MOF, metal is evenly dispersed in a carbon matrix, CeO2 / C / Nix is introduced into MgH2, microscale efficient catalysis of MgH2 is achieved, when the doping amount of CeO2 / C / Ni20 is 8 wt.%, the initial dehydrogenation temperature is 188.23 DEG C, and when the doping amount of CeO2 / C / Ni20 is 8 wt.%, the initial dehydrogenation temperature is 188.23 DEG C, and the specific surface area of CeO2 / C / Nix is 27.8 wt.%. After 10 cycles, the capacity retention rate is 98.8%, excellent hydrogen storage performance is shown, and a unique insight is provided for large-scale production of the magnesium-based hydrogen storage material.

A heat generating device includes: a sealed container; a tubular body provided in a hollow portion of the sealed container; a heat generating element provided on an outer surface of the tubular body and configured to generate heat by occluding and discharging hydrogen supplied to the hollow portion; and a flow path formed by an inner surface of the tubular body and through which configured to allow a fluid that exchanges heat with the heat generating element to flow. The heat generating element includes a base made of a hydrogen storage metal, and a multilayer film provided on the base. The multilayer film has a first layer made of a hydrogen storage metal and having a thickness of less than 1000 nm, and a second layer made of a hydrogen storage metal, which is different from that of the first layer, and having a thickness of less than 1000 nm.

A device (1) for hydrogen storage, comprising: a semiconductor substrate (2); at least one pillar (10) being arranged on the semiconductor substrate (2), the at least one pillar (10) comprising a core (12) and a shell (14), the core (12) of the pillar (10) comprising semiconductor material and the shell (14) of the pillar (10) enclosing the core (12) of the pillar (10), the shell (14) comprising: Mg3N2; and / or a plurality of GaN particles (16).

The present invention relates to a hydrogen storage pellet that allows the production of compact, modular, safe and energy-efficient hydrogen storage. The pellet of the present invention comprises a peripheral ring (4) of an outer diameter of expanded natural graphite (ENG) of a predetermined height, surrounding a wafer of metal hydride (5) in the form of a compressed powder.

The present invention relates to a process for producing and for regenerating siloxane hydrogen carrier compounds.

The application discloses an alkali metal hydride, a preparation method and application, and at least comprises the following steps: under a non-active atmosphere, ball milling raw materials containing alkali metal, an organic solvent and hydrogen to obtain the alkali metal hydride. The alkali metal hydride disclosed by the application has uniform particle size and wide application prospects in the fields of hydrogen storage, heat storage and catalytic synthesis; the preparation method is simple, suitable for large-scale and low-cost amplification, and has good development prospects and practical application value.

A metal modified graphene structure model is applied to predict hydrogen storage materials, comprising a structure simulation unit, a simulation data unit, a preparation measurement unit, a data processing unit and a parameter feedback unit; the structure simulation unit includes a graphene base structure composed of carbon atoms and a plurality of modified structure models pre-prepared for metal modification of the graphene base, combined into hydrogen storage materials; the simulation data unit calculates the structure of H2 molecules adsorbed on the hydrogen storage materials and calculates the simulation hydrogen storage data; the preparation measurement unit actually prepares the hydrogen storage materials and measures the actual hydrogen storage data; when the actual hydrogen storage rate data is greater than or equal to the first threshold value, the data processing unit calculates the difference percentage of the actual hydrogen storage data and the simulation hydrogen storage data, and outputs the data difference degree; otherwise, an abnormal warning signal is output; when the data difference degree is less than or equal to the second threshold value, the parameter feedback unit outputs that the hydrogen storage data of the preparation measurement unit is qualified, otherwise, an abnormal warning signal is output and feedback is performed, and data optimization is performed.

This invention discloses a hydrangea-like NiO@NiMoO4 composite material and its preparation and application, which belongs to the technical field of hydrogen storage materials. This application utilizes a comprehensive combination of hydrothermal, calcination, and ball milling techniques to produce the composite material. The resulting material exhibits a microscopic hydrangea-like spherical morphology with particle diameters of 2-3 μm. When this material was blended with MgH2 to form an MgH2+10 wt% NiO@NiMoO4 composite hydrogen storage material, it began to release hydrogen at 190°C and rapidly released 6.44 wt% H2 within 4.5 min at 300°C, achieving 99.4% of the theoretical hydrogen release amount. This demonstrates that this composite hydrogen storage material has good low-temperature hydrogen storage / desorption mechanical properties, a high hydrogen storage / desorption capacity, and good cycling stability. Overall, this material has great prospects for application in hydrogen storage and may provide a new concept for the research and development of hydrogen storage materials.

The invention discloses a hydrogen desorption system and method of a magnesium-based solid hydrogen storage reaction kettle, a hydrogen storage tank is placed in each placement position in an inner cavity of the reaction kettle, and each placement position is provided with a heat exchange coil pipe; the hydrogen desorption system comprises a hydrogen desorption part, a temperature control part and a safety protection part; the hydrogen desorption part comprises a hydrogen desorption main pipeline, a hydrogen desorption automatic switch valve is arranged on the hydrogen desorption main pipeline, and a vacuumizing pipeline is connected to the hydrogen desorption main pipeline in parallel; the temperature control part comprises an external heat-conducting oil circulating system, a flow bypass pipeline is arranged between the oil inlet pipeline and the oil return pipeline in a crossing manner, and a heat-conducting oil shunting automatic switch valve is arranged on the flow bypass pipeline; the safety protection part comprises a reaction kettle safety valve arranged on the reaction kettle, the reaction kettle safety valve is externally connected with an emptying pipeline, a pressure relief bypass pipeline is arranged between the emptying pipeline and the hydrogen desorption main pipeline in a crossing mode, and an automatic opening and closing pressure relief valve is arranged on the pressure relief bypass pipeline. The reaction kettle has the advantages that rapid and efficient hydrogen desorption of a plurality of hydrogen storage tanks in the reaction kettle is realized, and the system safety is ensured.

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 relates to a hydrogen direct-fired compressed CO2 energy storage system coupled with solid hydrogen storage, the hydrogen direct-fired compressed CO2 energy storage system comprises a solid hydrogen storage unit, a hydrogen direct-fired unit and a compressed CO2 energy storage unit, the solid hydrogen storage unit is connected with an inlet of the hydrogen direct-fired unit, and an outlet of the hydrogen direct-fired unit is connected with an inlet of the compressed CO2 energy storage unit; an outlet of the compressed CO2 energy storage unit is connected with an inlet of the hydrogen direct combustion unit; the compressed CO2 energy storage unit comprises at least two sections of compression devices, and each section of compression device is provided with an interstage heat exchanger. The system has the characteristics of zero carbon emission, safety, high efficiency and high energy utilization rate, and supports power grid peak regulation and zero carbon technologies.

The invention discloses a preparation method and application of a selective hydrogen adsorption type magnesium base material in a non-pure hydrogen atmosphere, and the preparation method comprises the following steps: carrying out thinning treatment on Ti3C2 MXene powder to obtain few-layer Ti3C2; the method comprises the following steps: weighing a MgH2 powder sample, pretreating, and then carrying out atomic layer deposition to obtain a sample subjected to atomic layer deposition coating treatment; carrying out ball milling treatment on the sample subjected to atomic layer deposition coating treatment and few-layer Ti3C2, so as to obtain MgH2-ZrTi; mgH2-ZrTi powder is weighed and pretreated, amorphous Al2O3 of 5 nm to 20 nm is deposited after pretreatment, and the selective hydrogen adsorption type magnesium-based material is obtained. The method disclosed by the invention is simple, efficient and easy to operate, is beneficial to large-scale production and application, and also fills the blank of air stability and selective hydrogen absorption of the hydrogen storage material.

An electrochemical cell active hydrogen capture and release system including a first zone having a target predetermined concentration of hydrogen c1 and housing: an electrical component, an adsorbing electrode including a hydrogen adsorbing material, a counter electrode separated from the adsorbing electrode, and an electric circuit connecting the adsorbing and counter electrodes to apply electrical bias configured to facilitate capture and release of hydrogen gas from the adsorbing electrode; and a second zone having a target predetermined concentration of hydrogen c2, c2 being greater than c1.

A solid state storage system includes a pressure-sealed storage unit defining an interior and having an outlet, an upper manifold and a lower manifold separated by a dividing plane having a set of ports, a set of chambers, and a solid state storage, wherein at least some gas is supplied to the outlet.

This invention discloses a hydrangea-like NiO@NiMoO4 composite material and its preparation and application, which belongs to the technical field of hydrogen storage materials. This application utilizes a comprehensive combination of hydrothermal, calcination, and ball milling techniques to produce the composite material. The resulting material exhibits a microscopic hydrangea-like spherical morphology with particle diameters of 2-3 μm. When this material was blended with MgH2 to form an MgH2+10 wt% NiO@NiMoO4 composite hydrogen storage material, it began to release hydrogen at 190°C and rapidly released 6.44 wt% H2 within 4.5 min at 300°C, achieving 99.4% of the theoretical hydrogen release amount. This demonstrates that this composite hydrogen storage material has good low-temperature hydrogen storage / desorption mechanical properties, a high hydrogen storage / desorption capacity, and good cycling stability. Overall, this material has great prospects for application in hydrogen storage and may provide a new concept for the research and development of hydrogen storage materials.

The invention discloses a core-shell structure catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. The core-shell structure catalyst comprises an inner core and a shell, wherein the inner core comprises carbon spheres; the shell covers the surface of the inner core and comprises titanium oxide. The preparation method of the core-shell structure catalyst comprises the following steps: preparing carbon spheres; mixing and impregnating carbon spheres and a titanium n-propoxide solution, and drying by distillation to obtain an impregnated product; placing the impregnated product in a nitrogen or inert atmosphere, raising the temperature to 700-900 DEG C at the speed of 3-5 DEG C / min, raising the temperature to 1100 DEG C at the speed of 4-6 DEG C / min for reaction, and cooling to obtain the Ti3O5-coated CS core-shell structure catalyst. The core-shell structure catalyst takes the carbon spheres as the core and the titanium oxide as the shell, and is used for the magnesium-based hydrogen storage material, so that the dehydrogenation temperature of the magnesium-based hydrogen storage material can be obviously reduced, and the dehydrogenation temperature is lower than 300 DEG C.

The application discloses a preparation method of a black phosphorus doped magnesium-based novel hydrogen storage material, and the method comprises the following steps: mixing and ball-milling black phosphorus micro powder and magnesium powder obtained through electrochemical exfoliation under an inert gas atmosphere, and performing ultrasonic crushing to obtain a nano Mg / BP composite material; and performing heat treatment on the nano Mg / BP composite material under an H2 atmosphere to obtain a nano MgH2 / BP hydrogen storage material. The method uses cheap magnesium powder as raw material, embeds the magnesium powder between expanded black phosphorus layers by using a simple method combining ball-milling and ultrasonic crushing, uses lone pair electrons of the black phosphorus as anchor points to solve the problem of easy agglomeration of magnesium powder nanoparticles, simultaneously uses a large specific surface area of the black phosphorus and strong physical adsorption characteristics of the black phosphorus on hydrogen to expand the capacity of the hydrogen storage material, and finally uses the attraction ability of the lone pair electrons of the black phosphorus on high-valence magnesium in magnesium hydride to weaken Mg-H bonds and effectively reduce the dehydrogenation temperature. The preparation method has the advantages of low cost, short cycle, strong repeatability and wide application prospect in the field of hydrogen energy.