18 results about "Hydrogen carrier" patented technology

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 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.

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 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.

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 present invention relates to a catalytic system comprising a catalyst, an ionic liquid and a mesoporous support, wherein the catalyst is not chemically bound to the mesoporous support, wherein the mesoporous support has a BET surface of at least 500 m 2 / g, as determined by ISO 9277:2022. The present invention also relates to methods, uses and devices related to the catalytic system. Preferably, the catalytic system is used for hydrogenation and dehydrogenation of liquid organic hydrogen carriers.

This ensures the necessary cooling for hydrogen absorption by the hydrogen carrier while reducing energy losses associated with hydrogen absorption. [Solution] The electrolytic system comprises a solid oxide electrolytic cell that electrolyzes water vapor supplied to a hydrogen electrode; a hydrogen absorption and release unit that cools a hydrogen carrier to absorb hydrogen and heats the hydrogen carrier to release hydrogen; a water vapor supply line that supplies water vapor to the hydrogen electrode; a recovery line that recovers hydrogen contained in the exhaust gas discharged from the hydrogen electrode to the hydrogen absorption and release unit; a gas-liquid separation unit provided in the recovery line that cools the exhaust gas by heat exchange with a coolant to separate the gas and liquid; a coolant supply line that supplies coolant to the gas-liquid separation unit and then to the hydrogen absorption and release unit; and a first cooling heat exchange unit provided in the hydrogen absorption and release unit that cools the hydrogen carrier by heat exchange with the coolant supplied from the coolant supply line.

The invention relates to a system (1) for generating electrical energy, comprising: a first oxygen reservoir (2) for oxygen or for oxygen-containing gas; and a first hydrogen reservoir (3) for hydrogen in flowable state; a first fuel cell (4) connected to the first oxygen reservoir (2) by a first oxygen line (5) and to the first hydrogen reservoir (3) by a first hydrogen line (6) and having a first water outlet (7); the system (1) further comprising a second hydrogen reservoir (8) for hydrogen bound to a hydrogen carrier and releasable again by adding water; a second fuel cell (9) which can be supplied with oxygen by a second oxygen line (10), which is further connected to the second hydrogen reservoir (8) by a second hydrogen line (11) and has a second water outlet (12), wherein the first water outlet (7) and the second water outlet (12) are connected to a water inlet (15) of the second hydrogen reservoir (8) by a first water line (13) and a second water line (14). The invention further relates to a method for generating electrical energy.

The application provides a hydrodeoxygenation catalyst, a preparation method and application of the hydrodeoxygenation catalyst in conversion of 1,4-cyclohexanedimethanol rectification light components, and the preparation method of the hydrodeoxygenation catalyst comprises the following steps: S1: dispersing a nickel source in a solvent to form a solution A1, dispersing a rare earth metal source and an aluminum source in a solvent to form a solution A2; preparing an alkaline solution B; S2: mixing the solution A1, the solution A2 and the alkaline solution B, performing a coprecipitation reaction to obtain a precipitate, and performing pyrolysis treatment on the precipitate to obtain the hydrodeoxygenation catalyst; and the hydrodeoxygenation catalyst provided by the application can be used to efficiently and environmentally protectively convert CHDM rectification light components, so as to obtain a liquid organic hydrogen carrier.

This invention relates to a high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn hydrogen storage composite material catalyzed by K2TiF6+Nb2O5, belonging to the field of solid-state hydrogen storage materials technology. It solves one of the problems of existing magnesium-based hydrogen storage materials, namely, high thermodynamic stability, complex activation process, high hydrogen desorption temperature, and slow hydrogen absorption / desorption kinetics. This invention discloses a Mg-based solid-state composite hydrogen storage material, the composition of which is: Mg... 95‑x‑y Sm x Nd y Ca2Cu 3‑z Zn z +m wt.%(K2TiF6+Nb2O5), where x, y, and z are atomic ratios, and 0.5≤x≤2, 0.5≤y≤2, 0.2≤z≤3, m is the percentage of K2TiF6+Nb2O5 in the alloy, 4≤m≤10, the mass ratio of K2TiF6 to Nb2O5 is 1:1, the preferred atomic ratio is 1.5:1.5:0.8, m=6. This high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn-based solid hydrogen storage composite material has high hydrogen absorption and desorption capacity and excellent hydrogen absorption and desorption kinetics; moreover, the preparation process is simple and easy to operate, suitable for large-scale preparation, and can be used as a hydrogen storage / hydrogen supply carrier in various scenarios.

The application discloses a hydrogenation and dehydrogenation method of a heterocyclic organic liquid hydrogen storage carrier, which utilizes a heterocyclic organic liquid and hydrogen to carry out a hydrogenation reaction to obtain a saturated organic condensate liquid, and a dehydrogenation process is adopted to remove hydrogen in the saturated organic condensate liquid through catalytic pyrolysis, and the regeneration and recycling of the unsaturated organic liquid are simultaneously realized; the hydrogenation and dehydrogenation process adopts Ru-based multi-component catalyst catalysis; the catalyst of the application can finely control the selectivity of the reaction under the premise of ensuring the reaction activity, can overcome the problems of low hydrogenation and dehydrogenation activity of the catalyst, carbon deposition and deactivation of the catalyst in the hydrogenation and dehydrogenation process and the like existing in the prior art, has high hydrogenation and dehydrogenation activity and stability, improves the purity of hydrogen, and simultaneously realizes the regeneration of the unsaturated organic liquid. The process has the advantages of simple process, low operation cost, mild hydrogenation and dehydrogenation conditions, repeated recycling of the organic liquid, no impurity gas in the dehydrogenation process, high operation stability and the like.

To provide a hydrogen operation planning apparatus and method that can formulate an overall optimal hydrogen operation plan. [Solution] The method for formulating a plan for the production, conversion, and transportation of hydrogen and hydrogen carriers involves calculating the correlation between each parameter—predicted renewable energy generation amount, predicted electricity demand, predicted hydrogen demand, hydrogen and hydrogen carrier storage amount, hydrogen and hydrogen carrier conversion amount, and hydrogen and hydrogen carrier transportation amount—for each predetermined time period in the target area using past data. A mathematical model of the operating costs of hydrogen and hydrogen carriers is created using the calculation results. Using the created mathematical model and the aforementioned predicted renewable energy generation amount for each time period of the target day or period, the amount of hydrogen and hydrogen carrier storage, hydrogen and hydrogen carrier conversion amount, and hydrogen and hydrogen carrier transportation amount that reduce the operating costs of hydrogen and hydrogen carriers are determined for each time period.

This invention relates to a CoAl-LDH derived catalyst for the hydrogenation of N-methylindole organic hydrogen storage carrier, its preparation method, and its application, belonging to the field of catalyst technology. The catalyst uses CoAl layered bimetallic hydroxide as a precursor, and a CoaAlb-MMOT non-noble metal catalyst is prepared by adjusting the Co / Al molar ratio and reducing it with hydrogen. By adjusting the feed ratio and reduction temperature, an optimal catalyst, Co1Al2-MMO500, with highly dispersed Co0 active sites, mesoporous structure, and strong metal-support interaction can be obtained. The catalyst provided by this invention exhibits excellent catalytic activity and selectivity in the selective deep hydrogenation of N-methylindole, enabling solvent-free hydrogenation. The process is simple, environmentally friendly, and maximizes the mass hydrogen storage density of N-methylindole as an organic hydrogen carrier. Simultaneously, the catalyst can operate stably for over 100 hours in a continuous flow system, demonstrating excellent industrial application stability.

This ensures the necessary cooling for hydrogen absorption by the hydrogen carrier while reducing energy losses associated with hydrogen absorption. [Solution] The electrolytic system comprises an electrolytic module including a solid oxide electrolytic cell, a hydrogen absorption / discharge unit that cools a hydrogen carrier to absorb hydrogen and heats the hydrogen carrier to release hydrogen, a water vapor supply line, a recovery line that recovers hydrogen contained in the exhaust gas discharged from the hydrogen electrode to the hydrogen absorption / discharge unit, a gas-liquid separation unit provided in the recovery line that cools the exhaust gas by heat exchange with a coolant to separate the gas and liquid, a first cooling heat exchange unit provided in the hydrogen absorption / discharge unit that cools the hydrogen carrier by heat exchange with a coolant, an absorption chiller, and a coolant circulation line that circulates the coolant so that it passes through the evaporator of the absorption chiller, the gas-liquid separation unit, and the hydrogen absorption / discharge unit in that order.

[Problem] To selectively hydrocrack a cyclic compound having a five-membered ring structure included in an aromatic compound used as a hydrogen carrier.[Solution] A zeolite composite catalyst used for hydrocracking a cyclic compound having a five-membered ring structure, the five-membered ring structure being included in an aromatic compound used as a hydrogen carrier, wherein the zeolite composite catalyst comprises aluminum or gallium, and wherein the zeolite composite catalyst comprises a zeolite with an MFI structure, and silica as a binder.

According to the present invention, a manufacturing, conversion, and transport plan for hydrogen and a hydrogen carrier is formulated by: using past data to respectively calculate, for each past prescribed time slot in a target region, the correlation among parameters constituted of a prediction value of a renewable energy power generation amount, a prediction value of a power demand amount, a prediction value of a hydrogen demand amount, storage amounts of the hydrogen and hydrogen carrier, reciprocal conversion amounts between the hydrogen and hydrogen carrier, and transport amounts of the hydrogen and hydrogen carrier; creating a mathematical model of an operation cost of the hydrogen and hydrogen carrier by utilizing the calculation results; and using the created mathematical model and the prediction value of the renewable energy power generation amount and the like for each time slot of a target date or time period to calculate, for each time slot, the storage amounts of the hydrogen and hydrogen carrier, the reciprocal conversion amounts between the hydrogen and hydrogen carrier, and the transport amounts of the hydrogen and hydrogen carrier that reduce the operation cost of the hydrogen and hydrogen carrier.

The present invention is directed to catalysts and their production which can be used to hydrogenate and dehydrogenate an organic hydrogen carrier compound. The catalysts is composed of a specially phosphorus doped PGM-type catalyst. 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 catalyst and its use is contemplated.