102 results about "Hydrogen carrier" patented technology

The invention discloses a method for producing formic acid by reducing carbon dioxide through a hydrogen-driven hollow fiber catalytic membrane reactor, and relates to the technical field of carbon dioxide resource utilization. In order to solve the problems of low formic acid product selectivity, low CO2 conversion efficiency and high cost in the prior art, hydrogen is used as the only energy source, and a hollow fiber non-porous membrane is utilized to realize bubble-free efficient mass transfer of H2 to form a compact hydrogen-rich layer on the surface; the nano-metal particle catalyst loaded on the surface of the membrane synergistically activates hydrogen at a gas-liquid-solid three-phase interface to generate active hydrogen atoms, and CO2 transferred in a dissolved state or a gas phase is subjected to directional catalytic reduction to form formic acid with high selectivity. The method is operated at normal temperature and normal pressure, so that the H2 utilization efficiency and the CO2 mass transfer efficiency are remarkably improved, and the byproduct separation cost and the operation energy consumption are effectively reduced; the produced formic acid can be used as an important chemical raw material and intermediate, an excellent liquid hydrogen storage carrier, a formic acid fuel cell fuel and a microbial carbon source, and has wide application value.

A method for determining the quality of a liquid organic hydrogen carrier material comprises using the liquid organic hydrogen carrier material in an LOHC application system (1), measuring at least two physical properties of the liquid organic hydrogen carrier material in the LOHC application system (1), comparing the measured physical properties with characteristic values ​​for the liquid organic hydrogen carrier material at different degrees of hydrogenation and at different impurity product concentrations, and determining the degree of hydrogenation (h) and a first impurity product concentration (c) as quality parameters of the liquid organic hydrogen carrier material.

This heat insulation structure of a tank wall includes a tank wall, a plurality of heat insulation panels, an interlayer heat insulation material, and a soft material. The tank wall defines an accommodation space for cryogenic fluid. The heat insulation panels are arranged on the outer periphery of the tank wall and each include an inner first heat insulation layer and an outer second heat insulation layer that have mutually different heat insulation performances. The interlayer heat insulation material is disposed between: the second heat insulation layer of one of the heat insulation panels that are adjacent when arranged on the outer periphery; and the second heat insulation layer of the other of such heat insulation panels. The interlayer heat insulation material is disposed in a state of being divided from the foregoing second heat insulation layers. The soft material is interposed between the interlayer heat insulation material and the second heat insulating layer.

The invention belongs to the technical field of organic liquid hydrogen storage, and discloses a catalyst and a preparation method thereof, and hydrogenation and dehydrogenation methods of a liquid organic hydrogen carrier. The catalyst is used for hydrogenation and dehydrogenation of a liquid organic hydrogen carrier, the catalyst comprises a nickel element and an aluminum element, and the average particle size of the catalyst is 300-900 [mu] m. The catalyst provided by the invention has relatively high hydrogenation and dehydrogenation activity and long-period stability, meanwhile, the preparation cost of the catalyst is greatly reduced compared with that of a traditional noble metal catalyst, and further commercial application of an organic liquid hydrogen storage technology is facilitated.

A catalyst material for the dehydrogenation of hydrogen carrier materials comprises carrier material particles which have an oxidic material, silicon carbide and / or activated carbon, as well as mesopores and / or macropores, catalytically active material which is held on the carrier material particles, which comprises a metal and which has a proportion of at least 0.1 wt.% based on the catalyst material.

Methods for storing hydrogen in subterranean salt caverns using chemical hydrogen carriers.

The present invention relates to a Ru-Ni bimetallic catalyst for the selective hydrogenation of a quinoline organic hydrogen storage carrier, and a preparation method therefor and the use thereof. In the catalyst, carbon nitride is used as a carrier, and metal nanoparticles Ru and Ni serve as active components and are jointly loaded on the carbon nitride carrier; and the carbon nitride is prepared by mixing carbon tetrachloride, ethidene diamine and nano-silica, reacting same to obtain a carbon nitride polymer, then calcining same at 750-850ºC, performing a desilicification treatment, and then filtering and drying same. The catalyst provided in the present application has good catalytic hydrogenation performance in the selective hydrogenation of the quinoline organic hydrogen storage carrier and can achieve the omission of a solvent in a reaction system; the reaction is simple, green and environmentally friendly, and the gravimetric hydrogen storage density of the system can be maximally ensured when a quinoline compound is used as an organic hydrogen carrier; moreover, the catalyst also has a good cycling stability.

This heat insulation structure for a tank wall comprises: a tank wall partitioning a containment space for a cryogenic fluid; a plurality of first heat insulation panels disposed on an outer periphery of the tank wall; a plurality of second heat insulation panels disposed on an outer periphery of the plurality of first heat insulation panels; a first elastic member and a second elastic member disposed in a circumferential gap along the tank wall between first panels among the plurality of first heat insulation panels and / or between second panels among the plurality of second heat insulation panels; and a third elastic member disposed in a radial gap orthogonal to the tank wall between the first heat insulation panels and the second heat insulation panels. The first elastic member and the second elastic member have different elastic moduli. The third elastic member has greater compressive elasticity than the first heat insulation panel and the second heat insulation panel, and compression resilience to fill the radial gap at a cold storage temperature.

A high specific surface area mesoporous alumina material with a surface rich in hydroxyl groups is produced by dissolving an aluminum source in an anhydrous organic alcohol solvent containing organic carboxylic acids, slowly and uniformly adding an aqueous ethanol solution to form an alumina sol, drying to obtain an alumina gel, and then treating with high-temperature steam at 400–650°C to obtain a material with... c Mesoporous alumina materials with Al2O3 crystal phase structure, well-developed mesoporous channel structure, high specific surface area and pore volume, and containing 5.0-10.0 mmol / g aluminum hydroxyl groups on the surface of mesoporous pore walls are suitable as catalyst supports for dehydrogenation reactions. The highly uniform loading of metal Pt active components significantly improves the low-temperature reaction activity, selectivity and stability of the catalyst for efficient dehydrogenation of liquid organic hydrogen supports.

This invention discloses the application of a Ni-based catalyst in the anti-CO poisoning hydrogenation reaction of a liquid organic hydrogen support, aiming to solve the technical problem of CO poisoning in existing LOHC hydrogenation catalysts. It uses CO-containing crude hydrogen as the hydrogen source to achieve the hydrogenation reaction. The Ni-based catalyst has an M / Ni reverse-phase structure, using hydrogen-dissociated metallic Ni as the support, and loading nano-metal oxide M as the supported phase to construct reverse-phase interfacial active sites. The metal M is a combination of Zr and Al, with the molar fraction of the supported phase metal M ranging from 10% to 25% based on 100% of all metals in the catalyst. The catalyst preparation method of this invention is simple and easy to implement, possessing a non-traditional supported reverse-phase structure. When applied to the anti-CO poisoning hydrogenation reaction, it exhibits superior activity compared to traditional supported catalysts. Furthermore, the reaction system is clean, safe, and reproducible, allowing for effective recycling and making it suitable for industrial production, showing promising application prospects.

A system of utilizing carbon dioxide comprises a carbon dioxide capturing device for capturing carbon dioxide, an electrochemical reaction device for producing synthetic gas by reducing the carbon dioxide captured by the carbon dioxide capturing device, a hydrogen carrier manufacturing device for manufacturing a hydrogen carrier material by using the synthetic gas produced by the electrochemical reaction device, a dehydrogenation device for producing hydrogen from the hydrogen carrier material manufactured by the hydrogen carrier manufacturing device, and a hydrogen utilization device for utilizing hydrogen produced by the dehydrogenation device, wherein the dehydrogenation device further produces carbon dioxide from the hydrogen carrier material and supplies the carbon dioxide to the carbon dioxide capturing device.

The invention belongs to the technical field of catalyst materials and hydrogen energy, and relates to a preparation method of a platinum-ruthenium bimetallic catalyst and an application method of the platinum-ruthenium bimetallic catalyst in hydrogenation of an organic hydrogen carrier. According to the technical scheme, the bimetallic catalyst contains a carrier and an active metal component, the carrier is porous alumina or other carriers, and the active metal component is a mixture of platinum and ruthenium components. The preparation method of the catalyst is an impregnation method, and comprises the following steps: preparing an alumina carrier, impregnating a metal precursor, roasting after impregnation, and carrying out reduction treatment. The invention also provides a process method for applying the catalyst to hydrogenation reaction of the organic hydrogen carrier. The process method comprises the following steps: adding the catalyst and the organic hydrogen carrier into a reaction container of a reaction kettle by adopting a kettle type reactor; the organic hydrogen carrier is benzyl toluene, dibenzyl toluene and the like. The preparation method of the platinum-ruthenium bimetallic catalyst, provided by the invention, has relatively high universality, is particularly suitable for the hydrogenation field of organic hydrogen carriers, and is beneficial to promoting the development of the technical field of hydrogen energy.

A process of carrying hydrogen on a hydrogen carrier is disclosed. The process comprises hydrogenating a hydrocarbon feed stream in a hydrogenation reactor in the presence of hydrogen and a hydrogenation catalyst to produce a hydrogenated stream for carrying hydrogen. The hydrogenated stream is contacted with a dehydrogenation catalyst to produce a dehydrogenated stream. The dehydrogenated stream is fractionated in a fractionation column to produce a fractionation column overhead stream comprising C7− hydrocarbons and a fractionation column bottoms stream. The hydrocarbon feed stream comprising about 1 to about 10 wt % C12 to C16 hydrocarbons can be taken from the fractionation column bottoms stream. A hydrocarbon composition comprising about 1 to about 10 wt % C12 to C16 hydrocarbons and at least about 80 wt % toluene is also disclosed.

A sea-going cargo carrier having a primary driving-mechanism and one or more back-up engines comprises liquefied hydrogen (LH2) tanks 10, hydrogen boil-off gas (BOG) compressors 18, compressed hydrogen containers 22 to store the compressed hydrogen, and pipework 24 to supply the compressed hydrogen to the back-up engines. The compressors compress the BOG from the liquefied hydrogen tanks to provide compressed hydrogen. The primary driving mechanism can be one or more of an internal combustion engine, a hydrocarbon-fuel engine, or one or more sails. The cargo carrier can be a liquefied gas carrier or a goods carrier. When the cargo carrier is a liquefied hydrogen carrier, it can have liquefied hydrogen tanks which are able to provide hydrogen BOG as a back-up engine fuel source. The BOG compressors can compress the BOG from the liquefied hydrogen tanks to a pressure above 200 barg. The compressed hydrogen containers can be isotainers.

This invention discloses an organic liquid energy storage carrier and its application, relating to the field of liquid organic hydrogen carrier technology. The organic liquid energy storage carrier of this invention is any one of p-fluorotoluene, m-fluorotoluene, o-fluorotoluene, and fluoromethylbenzene. The application method of this organic liquid energy storage carrier is as follows: 4Å molecular sieve, Rh catalyst, cesium carbonate, and the organic liquid energy storage carrier are sequentially added to a high-pressure reactor, and the reactor is sealed before hydrogen gas is introduced. Following this, microwave plasma pretreatment is performed, and then hydrogen gas is introduced until the pressure inside the reactor reaches 50 bar, followed by a hydrogenation reaction. After cooling, post-processing is performed to obtain the energy storage carrier. The organic liquid energy storage carrier of this invention not only possesses excellent safety and extremely low toxicity, but its application method also reduces reaction energy consumption and increases yield. Therefore, this invention has broader application prospects.

The utility model discloses a flexible system for wide-load fluctuation operation in a hydrogen carrier self-heating synthesis process technology. The system comprises a hydrogen carrier compound preparation device, a 1 # heat exchanger, a 2 # heat exchanger, a flow detection device, a first regulating valve, a second regulating valve, a temperature detection device and a control device, and the hydrogen carrier compound preparation device is sequentially connected with the 1 # heat exchanger and the 2 # heat exchanger. The temperature detection device is connected with an inlet of the hydrogen carrier compound preparation device, the control device is used for detecting results of the flow detection device and setting a first temperature target value and a second temperature target value, the first adjusting valve or the second adjusting valve adjusts the opening degree according to the first temperature target value, and the second adjusting valve adjusts the opening degree according to the second temperature target value. The hydrogen carrier compound preparation device operates at a constant temperature or a near constant temperature in a variable load state, wherein the load moves along with the source; according to the control system, rapid and timely flexible load adjustment is achieved, and efficient, safe and stable operation of the system is achieved.

This liquefied hydrogen carrier vessel, when viewed from above, includes a cargo area including a section where a tank is mounted, and a non-cargo area other than the cargo area, and is also provided with a predetermined hazardous section, a non-hazardous section other than the hazardous section, and a drive device including at least one electric motor that directly or indirectly drives a crane. In a plan view, at least a portion of the movable range of the crane overlaps with the cargo area, and the electric motor is arranged in the non-hazardous section.

The invention provides a method of storing and producing energy with the aid of a liquid hydrogen carrier (LHC) as a fuel material in a unified regenerative fuel cell having bifunctional electrocatalyst on its oxygen electrode. A fuel cell system comprising the unified regenerative fuel cell and a fuel supply and regeneration installation for the LHC is also provided.

The present invention is directed to a catalytic system which can be used to hydrogenate and dehydrogenate a liquid organic hydrogen carrier (LOHC) compound. The catalytic system is composed of a special type of catalyst, a special type of solvent, and an LOHC compound. It can be used to store and release hydrogen upon demand, e.g. for usage in fuel cells of electrically propelled vehicles. Likewise, an apparatus comprising the inventive catalytic system and its use is contemplated.

A liquid organic hydrogen carrier (LOHC) dehydrogenation system is described that is capable of satisfying the hydrogen demand over time in short-term kinetics while ensuring high dehydrogenation throughout all operating conditions. The system includes one or more reactors including a LOHC vessel and a circulation loop including a recirculation pump, a preheater capable of supplying reaction heat as sensible heat, and a cartridge filled with a solid catalyst.

The invention provides Pt 1-99- Ir1-99-Mo-99 aerogel useful as a bifunctional electrocatalyst in a unified regenerative fuel cell. Also provided is a unified regenerative fuel cell and a method of storing and producing energy with the aid of a liquid hydrogen carrier (LHC) as a fuel material in a unified regenerative fuel cell.

The application relates to a silicon carbide composite material preparation method based on optimization of a CVI deposition rate and a silicon carbide fiber reinforced silicon carbide composite material, which comprises silicon carbide fiber preform weaving, preform molding and drying, BN interface deposition, CVI densification and MI densification; the CVI densification takes methyltrichlorosilane as a precursor, hydrogen as a carrier gas and a reducing agent, the total supply flow rate of the hydrogen is controlled in the range of 9-11 L / min ‑1 , the reaction temperature is 1000-1300 DEG C, the system pressure is 20-25 kPa, and the deposition time is 50-80 hours. In the application, the hydrogen carrier gas flow rate in the CVI densification process is controlled in an optimization range, the phenomenon that the preform surface is prematurely sealed can be effectively avoided while sufficient precursor supply and higher deposition efficiency are ensured, the reaction gas can be fully penetrated into the preform and uniform deposition is realized, and the overall density and structural uniformity of the composite material are effectively improved.

A hydrogen generation apparatus includes a first liquid providing apparatus and a controller. The first liquid providing apparatus provides a liquid containing at least water to a solid hydrogen carrier. The controller controls an amount of the liquid that the first liquid providing apparatus provides to the hydrogen carrier.

This invention discloses a high-hydrogen-density liquid organic hydrogen carrier and its applications, belonging to the field of hydrogen energy storage and utilization technology. The liquid organic hydrogen carrier is a composite system of a functionalized nitrogen-containing heterocyclic compound and a metal-organic framework material supported on a non-precious metal catalyst. The nitrogen-containing heterocyclic framework is connected with electron-donating and electron-withdrawing groups, constructing an intramolecular electron push-pull system. The non-precious metal catalyst is supported inside the pores or on the surface of the metal-organic framework material. Through molecular structure design and catalyst system optimization, this invention achieves a hydrogen storage density of not less than 7.0 wt%, a dehydrogenation onset temperature of not more than 150℃, and a dehydrogenated hydrogen purity of not less than 99.99%, with excellent cycle stability and low catalyst cost. This liquid organic hydrogen carrier can be widely used in renewable energy storage, long-distance hydrogen transportation, vehicle-mounted hydrogen sources, and distributed energy supply systems.

The invention relates to the technical field of hydrogen storage and release, in particular to a hydrogen storage and release system for a low-saturated vapor pressure liquid hydrogen storage carrier, which comprises a heat exchange unit, a feeding and discharging unit, a hydrogen storage unit, a hydrogen release unit and a separation unit, the heat exchange unit is connected with the hydrogen storage unit, the hydrogen desorption unit and the separation unit through pipelines and used for adjusting the temperature of materials in the units, and the feeding and discharging unit is connected with the hydrogen storage unit, the hydrogen desorption unit and the separation unit through pipelines and used for adjusting and controlling conveying of a hydrogen storage carrier and a hydrogen-rich carrier; according to the design scheme, the liquid organic hydrogen storage carrier with high saturated vapor pressure is selected, the hydrogen storage system with the low-pressure hydrogenation characteristic and the hydrogen desorption system with microwave heating serving as the only heat source are coupled, the higher energy utilization rate can be achieved, the high selectivity of the hydrogen desorption reaction process can be achieved, the separation and purification process is simplified, and the hydrogen desorption efficiency is improved. And high-purity hydrogen can be released at lower cost.

A method for providing hydrogen, comprising: releasing hydrogen (H2) in a dehydrogenation reactor (2) by catalytic dehydrogenation of at least partially loaded hydrogen carrier medium (Hx-LOHC) to form at least partially unloaded hydrogen carrier medium (H0-LOHC); oxidizing the at least partially unloaded hydrogen carrier medium (H0-LOHC) in an oxidation reactor (5) by catalytic oxidation with an oxidizing agent to form at least partially oxidized hydrogen carrier medium (Ox-LOHC); reducing the at least partially oxidized hydrogen carrier medium (Ox-LOHC) by catalytic hydrogenation in a hydrogenation reactor (21) to form the at least partially loaded hydrogen carrier medium (Hx-LOHC); and removing at least one oxygen-containing impurity from the at least partially loaded hydrogen carrier medium (Hx-LOHC) and / or from the at least partially oxidized hydrogen carrier medium (Ox-LOHC).

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

A method of producing a liquid organic hydrogen carrier (LOHC). The method includes delivering a hydrocarbon feed stream rich in aromatic hydrocarbons to a thermal treatment unit to convert olefin compounds to heavier compounds by a dimerization reaction and generate a dimerized feed stream; delivering the dimerized feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream at a cut point of 115°C to 150°C; and delivering the light fraction stream to an aromatic hydrocarbon extraction unit to form an aromatic compound stream and a non-aromatic compound stream. The method also includes delivering the aromatic compound stream and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and delivering the hydrotreated effluent stream to a separator to remove unsaturated compounds, thereby isolating a saturated compound as a LOHC stream.

The present application belongs to the field of catalysis. It discloses a monatomic catalyst for the dehydrogenation of a liquid organic hydrogen carrier, a manufacturing process, and an application thereof. The monatomic catalyst comprises a metal oxide support and individual atoms of a noble metal packed onto the oxide support. When subjected to the dehydrogenation reaction process of the liquid organic hydrogen carrier, the monatomic catalyst exhibits superior catalytic activity compared to metal particles, effectively reducing the use of the noble metal and thus lowering the catalyst's cost.

The invention relates to a method for dehydrogenating a liquid hydrogen carrier material in the form of a metal hydride or a liquid organic hydrogen carrier (LOHC), the method comprising the following steps: a. providing the metal hydride or the LOHC to a thin-film evaporator (1), the LOHC being brought into contact with a catalyst that is admixed with the LOHC prior to entry into the thin-film evaporator (1), and / or the LOHC coming into contact with a catalyst in the thin-film evaporator (1); b. mechanically generating, by means of a rotor (3), a film of the liquid hydrogen carrier material on a cylindrical or conical heated wall (7) in the thin-film evaporator (1), the chemical bond of the hydrogen to the liquid hydrogen carrier material being cleaved by supplying heat via the wall (7), the hydrogen thus produced being withdrawn from the thin-film evaporator (1) and the residual liquid hydrogen carrier material being collected.