207 results about "Hydrogen carrier" patented technology

According to the Pt cluster catalyst, the preparation method and the application, an aluminum oxide composite metal oxide carrier is prepared by adopting a pH swing method, a defect oxide nano island is formed through high-temperature reduction treatment, and oxygen vacancies contained on the surface can firmly anchor a subsequently loaded Pt cluster, so that the coking phenomenon of the Pt-based catalyst is reduced, and the catalytic activity of the Pt-based catalyst is improved. The catalytic activity and the stability of the Pt cluster catalyst are obviously improved. Meanwhile, Pt clusters are prepared through a heating reflux method, so that the Pt clusters have high dispersity and rich active sites, the finally prepared Pt cluster catalyst is small in Pt particle size and high in atom utilization rate, and when the Pt cluster catalyst is used for catalyzing a dehydrogenation reaction of a liquid organic hydrogen carrier, the Pt cluster catalyst is weak in adsorption capacity to a product, and the catalytic activity of the liquid organic hydrogen carrier is improved. The catalyst can show high conversion rate and hydrogen release rate at low temperature, can still keep stable structure at high temperature, and provides an efficient and reliable solution for engineering application of an LOHC dehydrogenation link.

The invention discloses a method for preparing micro-nano magnesium hydride powder, which comprises the following steps: in a vacuum environment I, heating a magnesium raw material to form magnesium steam, and simultaneously introducing trace carrier gas I; in the vacuum environment II, magnesium steam is conveyed through the trace carrier gas I to be mixed with the carrier gas II to form mixed gas, meanwhile, the mixed gas is made to rapidly flow through the injection evacuator, the magnesium steam is cooled and hydrogenated, and the micro-nano magnesium hydride powder is formed. Compared with the prior art, the gasification efficiency of magnesium is higher, the magnesium is taken away by airflow, residues in an evaporation chamber are less, the utilization rate of the magnesium is high, produced magnesium powder is directly brought into the next link through hydrogen carrier gas, the processes of passivation, bin opening, powder taking and the like are omitted, magnesium powder conveying is more efficient and safer, and the production cost is reduced. Through the pre-hydrogenation of the magnesium powder and the shearing action of the carrier gas of the high-speed hydrogen, the generated magnesium powder particles are smaller, the magnesium hydride powder particles generated after hydrogenation are smaller, the activity is better, and the technical process is easier to realize large-scale amplification and automatic control.

A Liquid Organic Hydrogen Carrier (LOHC) dehydrogenation system is described, capable of meeting time-variable hydrogen demands with short dynamics while always ensuring a high degree of dehydrogenation under all operating conditions. The system comprises one or more reactors comprising an LOHC vessel and a recirculation circuit comprising a recirculation pump, a preheater capable of supplying the reaction heat as sensible heat, and a cartridge containing the solid catalyst.

The invention discloses an electricity-hydrogen comprehensive energy system low-carbon scheduling method considering alcohol transportation and a related device, and relates to the technical field of electricity-hydrogen coupling scheduling, the method comprises the steps that a double-layer low-carbon scheduling model is established and solved, the double-layer low-carbon scheduling model comprises an upper-layer optimization scheduling model and a lower-layer optimization scheduling model, and the upper-layer optimization scheduling model comprises an upper-layer optimization scheduling model and a lower-layer optimization scheduling model; the upper-layer optimization scheduling model takes the minimum comprehensive operation cost of an electricity-hydrogen comprehensive energy system as a target function, takes the equipment operation constraint of a hydrogen supply chain, the wind and light abandoning constraint of new energy and the power flow constraint of a power distribution network as constraint conditions, and the lower-layer optimization scheduling model takes the minimum low-carbon demand response electricity-carbon comprehensive subsidy cost as a target function; the demand response constraint of the power distribution network and the power adjustment constraint of the methanol reforming hydrogen production equipment in the hydrogen supply chain are taken as constraint conditions, the carbon emission responsibility of the user side of the power distribution network can be considered, the carbon dioxide emission for transportation by taking methanol as a hydrogen carrier is reduced, and the low-carbon scheduling of the electricity-hydrogen comprehensive energy system is realized.

The invention relates to the field of catalysts, and discloses a catalyst, a preparation method and application thereof, and a dehydrogenation method of a hydrogen storage carrier. The catalyst is of a core-shell structure and comprises an inner core and an outer shell, the inner core comprises a carrier and non-noble metal, assistant metal and auxiliaries which are loaded on the carrier, and the outer shell comprises an aluminum oxide coating layer and noble metal active components loaded on the aluminum oxide coating layer; the non-noble metal comprises Ni; the auxiliary metal is selected from at least one of VIB group metal and VIIB group metal; the auxiliary agent is S and / or P. The catalyst provided by the invention can be used for effectively inhibiting the side reaction of the hydrogen storage carrier while obtaining a relatively high dehydrogenation rate.

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.

The present invention provides a system, a process and a method of storing hydrogen (H2) and releasing it on demand, comprising and making use of N-heterocycles as liquid organic hydrogen carriers (LOHCs).

The invention discloses a probiotic-palladium hydride biological hydrogen storage system as well as a preparation method and application thereof. The preparation method comprises the following steps: co-incubating probiotics and bivalent palladium salt, adding or not adding organic sodium salt to continue incubation, introducing hydrogen into the obtained incubation liquid, and reacting to obtain the probiotic-palladium hydride biological hydrogen storage system. The technical problem that due to the special properties of small molecular size, non-polarity, low solubility, easy diffusion and the like of hydrogen, targeted transportation and controllable release of hydrogen are difficult to achieve through a traditional hydrogen treatment means at present is solved, synthesis of palladium nano-enzyme on the surfaces of probiotics and loading of hydrogen are achieved through a one-step method, the palladium nano-enzyme serves as a hydrogen carrier, and the preparation method is simple and convenient. Under the combined action of the probiotics, directional transportation of the hydrogen is realized, so that the functions of resisting inflammation, resisting oxidative stress and regulating intestinal flora of the hydrogen are realized in intestinal tracts.

A method for producing liquid organic hydrogen carriers (LOHCs). The method includes passing a hydrocarbon feed stream rich in aromatics to a thermal treatment unit to convert olefinic compounds to heavier compounds through dimerization reaction and generate a dimerized feed stream; passing the dimerized feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream split at 115° C. to 150° C.; and passing the light fraction stream to an aromatics extraction unit to form an aromatic compounds stream and a non-aromatic compounds stream. The method also includes passing the aromatic compounds stream and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and passing the hydrotreated effluent stream to a separator to remove unsaturated compounds to isolate the saturated compounds as a LOHC stream.

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.

A method for subsurface hydrogen storage and hydrogen retrieval. The method includes identifying a subsurface formation [30] (step 100). The method further includes selecting a liquid organic hydrogen carrier (LOHC) feed [10] compatible with the subsurface formation [30] (step 110). The LOHC feed [10] includes a mixture of one or more completely or partially hydrogenated LOHCs. The LOHC feed [10] is injected into the subsurface formation [30] (step 120) for storage (step 130). Later, when needed, the LOHCs are recovered from storage [13] (step 140), optionally separating a recovered water / brine phase [15] and off gas [16] from the LOHCs from storage [13 / 14] in a separator [21] configured to produce a stream of recovered LOHCs [13] (step 150). The recovered LOHC [13] is then dehydrogenated to form a H2 product [17] and dehydrogenated LOHCs [18] in a dehydrogenation unit [22] process (steps 180 and 190).

According to the LOHC coupled PEM electrolytic cell hydrogen production-hydrogen storage integrated system and the control method, the back pressure valve is arranged, the control system controls the system to be started during hydrogenation reaction, the anode pressure of the electrolytic cell is increased, and therefore the resistance of a cathode hydrogen-poor organic carrier and hydrogen permeating into the anode is increased; therefore, the permeation amount of hydrogen and hydrogen-poor organic carriers at the proton exchange membrane is reduced, the influence on the hydrogenation efficiency is reduced, the resistance in a PEM hydrogenation system can be prevented from being increased, the influence on the current density in the hydrogenation process is reduced, and the hydrogenation efficiency of the organic liquid hydrogen storage carrier is more favorably improved.

A process is provided using a single atom metal or semi-metal catalyst to photoreform abundant small molecule hydrogen vectors to produce hydrogen and a value-added by- product.

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 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 system for the production and use of a liquid organic hydrogen carrier medium (LOHC) comprises a production unit (2) for the production of LOHC and an LOHC reactor (3) coupled to the production unit (2) for storing and / or releasing hydrogen by means of the LOHC.

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.

A method for producing liquid organic hydrogen carriers from plastic oil. The method includes passing a plastic oil stream and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream and passing the hydrotreated effluent stream to a separator to isolate the liquid organic hydrogen carriers as an LOHC stream from the unreacted hydrogen and byproducts as a residual stream. The method further includes passing the residual stream to a reclamation unit to recover the unreacted hydrogen as a recovered hydrogen stream from the residual stream and passing the recovered hydrogen stream to the hydrogenation unit to offset hydrogen demand from the input hydrogen stream. The remainder of the residual stream upon recapture of the unreacted hydrogen generates a byproducts stream.

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

A method for producing liquid organic hydrogen carriers (LOHCs). The method includes passing a hydrocarbon feed stream rich in aromatics to a selective hydrogenation reactor configured to saturate olefins selectively without aromatic saturation to generate a hydrotreated feed stream; passing the hydrotreated feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream split at 218℃ to 250℃; and passing the light fraction stream to an aromatics extraction unit to form an aromatic compounds stream. The method also includes passing the non-aromatic compounds stream to a naphthene separator to generate a naphthenic stream; passing the aromatic compounds stream, the naphthenic stream, and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and passing the hydrotreated effluent stream to a separator to remove unsaturated compounds to isolate the saturated compounds as a LOHC stream.

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.

One or more liquid organic hydrogen carriers may be processed by a method that includes passing one or more hydrogen-diminished liquid organic hydrogen carriers and hydrogen into a hydrogenation reactor to form a hydrogenation reactor effluent. The hydrogenation reactor effluent may include one or more hydrogen-rich liquid organic hydrogen carriers and unreacted hydrogen. the method may further include passing the hydrogenation reactor effluent from the hydrogenation reactor to a separation unit and separating at least the one or more hydrogen-rich liquid organic hydrogen carriers from the unreacted hydrogen in the separation unit. The method may further include passing at least a naphtha feed and the unreacted hydrogen to a naphtha hydrotreater to produce a hydrotreater effluent that includes a hydrotreated naphtha.

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 present invention provides a method for absorbing hydrogen (H) in a crankcase (14) of a hydrogen internal combustion engine (10), comprising injecting (S1) hydrogen (H) into a combustion chamber (12) of the hydrogen internal combustion engine (10) by a hydrogen injector (11); wherein a piston (13) of the hydrogen internal combustion engine (10) is configured to compress and expand the hydrogen (H) injected into the combustion chamber (12); injecting (S2) a hydrogen carrier medium (L) into the crankcase (14) through a nozzle (15) for hydrogenating the carrier medium (L) within the crankcase (14) with hydrogen (H) escaping from the combustion chamber (12) past a side wall (13a) of the piston (13) into the crankcase (14); collecting (S3) the hydrogenated carrier medium (21) from the crankcase (14) by a collector (20);Heating (S4) the hydrogenated carrier medium (21) by means of a heating device (30) to dehydrogenate the carrier medium (L, 21) and extract hydrogen (H) from the hydrogenated carrier medium (L, 21); and injecting (S5) the dehydrogenated carrier medium (L, 22) through the nozzle (15) into the crankcase (14) for hydrogenation. The present invention further provides a system (1) for a motor vehicle and a motor vehicle (100) having the system (1) according to the invention.

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.