44 results about "Hydrogen cycle" patented technology

The present disclosure provides a hydrogen decrepitation apparatus and a hydrogen recycling method. The hydrogen decrepitation apparatus comprises a hydrogen decrepitation furnace, a solid hydrogen-storage device, a first hydrogen recovery pipeline, a second hydrogen recovery pipeline, a hydrogen reuse pipeline, a first discharge pipe, a second discharge pipe, an inert gas pipeline, and a bypass pipeline. The hydrogen decrepitation apparatus enables hydrogen used in hydrogen decrepitation to be reused, thereby reducing costs of hydrogen decrepitation and lowering energy waste.

The invention relates to a rare earth modified AB2 type solid hydrogen storage alloy and a batch preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves the problems of high activation condition, long activation period, overhigh hydrogen absorption platform pressure, high batch preparation smelting difficulty, low yield, unstable product quality and the like of the traditional Ti-Mn series hydrogen storage alloy in the prior art. The specific composition of the hydrogen storage alloy is Ti < 1.1-x-y > Y < x > Zr < y > Mn < 2.0-y-z-m > Cr < z > Ni < m > Co < n >, x, y, z, m and n in the formula are atomic ratios, x is larger than or equal to 0.01 and smaller than or equal to 0.04, y is larger than or equal to 0.10 and smaller than or equal to 0.35, z is larger than or equal to 0.45 and smaller than or equal to 0.70, m is larger than or equal to 0.1 and smaller than or equal to 0.2, and n is larger than or equal to 0.05 and smaller than or equal to 0.15. The hydrogen storage alloy has good activation performance and hydrogen absorption and desorption performance, the hydrogen storage capacity is larger than or equal to 1.86 wt.%, and the hydrogen absorption and desorption platform pressure can be adjusted according to application requirements; under the conditions that the temperature is 20 DEG C and the initial hydrogen pressure is 3 MPa, activation can be completed through one-time hydrogen absorption and desorption circulation; after 200 times of hydrogen absorption and desorption cycles, the capacity retention ratio of the alloy is gt; and 98%. The invention further provides a preparation method of the hydrogen storage alloy, the method has the advantages of being simple and easy to operate, high in yield, stable in product quality and the like, and the problem of component segregation of a casting process is fundamentally solved.

Proposed is a hydrogen management system in which location information, pressure information, temperature information, collision information, hydrogen concentration information, and flow rate information are transmitted from sensors mounted in a manifold of each of a plurality of tube trailers (T1, T2, . . . ), and the hydrogen consumption amount, the remaining hydrogen amount, the number of users, etc. are transmitted from the plurality of hydrogen charging stations (S1, S2, . . . ) so that current hydrogen storage and demand amounts are predicted, thereby managing an entire hydrogen cycle, including hydrogen production, in an integrated manner.

The invention belongs to the technical field of hydrogen energy, and relates to a multi-dimensional Ti-based solid hydrogen storage material and a preparation method thereof.The multi-dimensional Ti-based solid hydrogen storage material is composed of Ti, V, Mn, Zr and Ni, the chemical expression of the material is TiaVbMncZrdNie, the atomic ratio of all the elements is as follows: a = 0.60-0.65, b = 0.08-0.12, c = 0.08-0.10, d = 0.04-0.07 and e = 0.08-0.12, and a + b + c + d + e = 1; the preparation method comprises the steps that firstly, raw materials are taken and pulverized, then, nano alloy powder is prepared through ultrasonic smashing, hydrogen storage composite powder is prepared through surface treatment, and finally, the multi-dimensional Ti-based solid hydrogen storage material is prepared through hydrogen absorption and desorption cycle activation. The technical problems that in the prior art, a titanium-based solid hydrogen storage material is low in desorption speed, low in hydrogen storage capacity, poor in cycling stability and prone to oxidation are solved.

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a metal borohydride composite material, a preparation method thereof and a hydrogen storage material. The preparation method comprises the following steps: activating the carbon-based carrier by adopting an alkaline substance; performing gas-phase fluorination treatment on the activated carbon-based carrier; the carbon fluoride-based carrier is mixed with a metal source, a boron source and a solvent, a solvothermal reaction is driven by hydrogen, metal borohydride is synthesized in situ on the surface of the carbon fluoride-based carrier, metal atoms in the generated metal borohydride react with F atoms in the carbon fluoride-based carrier to form a metal-F bridging phase, and meanwhile, the metal borohydride generates metal vacancies. The metal affinity of fluorine in the carbon fluoride-based carrier is utilized to induce nucleation loading of the metal borohydride in the synthesis process of the metal borohydride, and meanwhile, an interface chemical reaction is carried out to generate vacancies and bridging phases. Vacancies weaken B-H bonds, the hydrogen absorption and desorption heat / dynamics of the material are improved, and the bridging phase improves the structural stability and hydrogen absorption and desorption cycle performance of the material.

The invention discloses a hydrogen storage material variable temperature hydrogen absorption and desorption cycle test method based on a Sieverts constant volume method. In a cycle test of the variable-temperature hydrogen absorption and desorption cycle test method, a single hydrogen absorption and desorption process comprises temperature-dependent hydrogen absorption and temperature-dependent hydrogen desorption of a hydrogen storage material in a closed system, namely, the single hydrogen absorption and desorption process comprises a cooling hydrogen absorption reaction and a heating hydrogen desorption reaction of the hydrogen storage material along with temperature change; the closed system is a constant-volume closed system without hydrogen material exchange with the outside. According to the invention, the hydrogen absorption and desorption cycle test efficiency of the reversible hydrogen storage material can be obviously improved, and the method has the advantages of controllable hydrogen absorption and desorption depth, temperature and hydrogen back pressure, simple process flow, high system adaptability, good controllability, good repeatability and the like. By optimizing and matching the loading capacity of the hydrogen storage material, the intrinsic thermodynamic PCT characteristic, the test temperature and the system volume, the hydrogen storage material can complete rapid hydrogen absorption and desorption circulation under the conditions of controllable hydrogen absorption and desorption depth, temperature and hydrogen back pressure.

An apparatus and process for recycling hydrogen can be provided so that hydrogen is recycled during hydrogen liquefaction processing to account for an unexpected loss of feed of hydrogen so the recycled hydrogen can be provided to avoid liquefier operations having to be shut down. Embodiments can utilize a parahydrogen to ortho-hydrogen conversion unit to facilitate such recycling of hydrogen to avoid liquefaction processing problems in liquefaction of the recycled hydrogen included into the feed to account for the loss of fee hydrogen.

The hydrogen recycling unit recovers hydrogen from the generator via a hydrogen recovery pipeline and stores it in the first storage tank. The hydrogen stored in the first storage tank is compressed by a compressor and stored in the second storage tank. The hydrogen stored in the second storage tank is supplied to the generator via a hydrogen supply pipeline.

The application provides an A2B7 type Y-Mg-Ni hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage materials. 1‑a‑b Mg a C b Ni c D d , wherein 0.05<=a<=0.25, 0<=b<=0.2, 3.25<=c<=3.45, 0<=d<=0.2, C is at least one selected from Ce, Pr, Nd, Sm, Gd, and D is at least one selected from Mn, Mo, Fe, Ti, Si and W. The hydrogen storage alloy material is doped with elements and modified in process, so that the pure A2B7 type hydrogen storage material is obtained, the hydrogen storage capacity of the rare earth hydrogen storage alloy, the hydrogen absorption and release cycle stability and the hydrogen absorption and release plateau pressure can be improved simultaneously.

The invention discloses an anti-poisoning magnesium-based hydrogen storage material as well as a preparation method and application thereof, and belongs to the technical field of hydrogen storage materials and preparation processes thereof. According to the anti-poisoning magnesium-based hydrogen storage material, MnO, NdH2 and CeH2 nano catalytic phases are generated on the surfaces of magnesium-based hydrogen storage alloy particles in situ, and the MnO, NdH2 and CeH2 nano catalytic phases cooperate with Mg2Ni and NdH2 phases in magnesium-based hydrogen storage alloy to form an integral continuous hydrogen pump with multiple nano phases and multiple nano interfaces. The invention discloses application of an anti-poisoning magnesium-based hydrogen storage material to hydrogen absorption and desorption in a non-pure H2 atmosphere. The non-pure H2 atmosphere comprises byproduct hydrogen, natural gas reforming hydrogen and chemical tail gas hydrogen. The first hydrogen absorption capacity of the material reaches 4.5-5.5 wt.% in the atmosphere of 95% H2 + 5% N2, 95% H2 + 5% CO2 and 95% H2 + 5% SO2 under the conditions of 300 DEG C and 2 MPa hydrogen pressure, and the reversible hydrogen absorption and desorption capacity retention rate is larger than 87% after 80 times of hydrogen absorption and desorption circulation under the same condition.

The invention discloses a Ni / MoC catalyst as well as a preparation method and application thereof. The catalyst takes a metal carbide as a carrier and takes a transition metal as an active auxiliary agent. According to the prepared catalyst, an efficient, economical and environment-friendly'hydrogen storage-hydrogenation 'circulating system is ingeniously constructed, and a series of pain points of high-pressure danger, high cost of a noble metal catalyst, difficulty in selectivity control and the like in a traditional ANT hydrogenation process are successfully solved; and a brand-new path with industrial potential is provided for green synthesis of sym-OHA and related fine chemicals.

The utility model relates to a hydrogen circulation system which comprises a heating furnace, a thermochemical hydrogen production mechanism, a gas outlet pipeline connected with a top gas outlet of a shaft furnace, and a gas return pipeline connected with a reaction gas inlet of the shaft furnace, the gas outlet pipeline is connected with a heat source channel of an H2SO4 decomposer and a heat source channel of an HI decomposer of the thermochemical hydrogen production mechanism in series and then is connected with a heat exchange gas inlet of the heating furnace, and the gas return pipeline is connected with a heat exchange gas outlet of the heating furnace; and hydrogen produced by the thermochemical hydrogen production mechanism is supplied to the shaft furnace as reaction gas. Correspondingly, the utility model further provides a pure hydrogen shaft furnace provided with the hydrogen circulating system. According to the device, the gas outlet pipeline is connected with the heat source channel of the H2SO4 decomposer and the heat source channel of the HI decomposer in series, and part of heat energy of the furnace top gas is recycled for sulfur-iodine thermochemical hydrogen production, so that the high-temperature requirement of sulfur-iodine thermochemical hydrogen production is met, and hydrogen circulation of the pure hydrogen shaft furnace can be realized; the production cost of the pure hydrogen shaft furnace can be obviously reduced, and the production reliability of the pure hydrogen shaft furnace is improved.

The invention provides a preparation method of a foam metal composite hydrogen storage material, which comprises the following steps: mixing vanadium-containing alloy powder, a pore-forming agent and an organic binder, carrying out compression molding, and carrying out heat treatment to densify the alloy so as to obtain an inner-layer pressure-bearing framework; depositing a magnesium-titanium nano composite layer through a magnetron co-sputtering technology; growing a graphene layer through chemical vapor deposition; immersing the framework on which the graphene layer grows into a solution containing palladium salt, and generating and loading palladium nanoparticles on the surface of graphene in situ to form a surface catalyst layer, so as to obtain a metal foam framework; and immersing in a solution containing zircon salt and an organic ligand, and growing a metal organic framework on the surface in situ through solvothermal reaction to obtain the foam metal composite hydrogen storage material. The mechanical strength, the hydrogen storage capacity and the dynamic performance of the material are improved, the stability of the material in hydrogen absorption and desorption circulation is improved, and the defects of a traditional hydrogen storage material in the aspects of mechanical performance, hydrogen storage efficiency, circulation stability and the like are overcome.

The application discloses a metal hydride hydrogen storage tank and a hydrogen storage method thereof, relates to the hydrogen storage technical field in the hydrogen energy industry, and comprises a hydrogen storage tank shell, a multilayer hydrogen storage module, a circulating heat exchange system and a bottom skirt, wherein a manhole is formed in the top of the hydrogen storage tank shell; a hydrogen inlet and a hydrogen outlet are formed in the side of the hydrogen storage tank shell; the multilayer hydrogen storage module and the circulating heat exchange system are arranged in the hydrogen storage tank shell and are connected; the hydrogen storage tank shell is welded on the bottom skirt, and a water inlet pipe and a water outlet pipe are led out from the bottom skirt. The modular metal hydride hydrogen storage tank can be used for a long time in a hydrogen atmosphere, can withstand the temperature change caused by hydrogen absorption and release, can withstand its own weight, avoids large deformation of the device in the use process, can be used for long-term cyclic hydrogen absorption and release, and safety, reliability and sustainability are maintained.

The invention discloses a nano CeO2 catalyzed high-capacity Mg-RE-based CeMg12 type composite hydrogen storage material and a preparation technology thereof, and relates to the technical field of solid hydrogen storage materials, the chemical formula of the composite hydrogen storage material is Mg < 25-x > Ti < x > Ce < 4-y > Pr < y > Cu < 2-z-m > Co < z > S < cm + n wt.% CeO2, x, y, z and m in the formula are atomic ratios and 0 lt; x is less than or equal to 2, 0lt; y < = 2, 0lt; z < = 0.5, 0lt; m is less than or equal to 0.2, n is the percentage of the nano CeO2 catalyst in the master alloy, and n is more than or equal to 3 and less than or equal to 10; the composite hydrogen storage material has high hydrogen storage capacity, good hydrogen absorption and desorption dynamic performance and cycling stability. The hydrogen storage capacity is greater than or equal to 5.19 wt.%, and the capacity retention ratio S200 is greater than or equal to 93.2% after 200 times of hydrogen absorption and desorption cycles. The invention provides a vacuum medium-frequency induction melting and rapid quenching process for batch preparation of the master alloy, and also provides a corresponding ball milling process. The preparation process has the advantages of being simple and easy to operate, high in preparation efficiency, stable in product quality and the like, and is suitable for large-scale preparation of the Mg-RE-based solid hydrogen storage material.

The invention relates to the technical field of hydrogen storage materials, in particular to a doped symbiotic LaH2.46-La2O3 ultra-fine grain low-temperature reversible hydrogen absorption and desorption magnesium-based composite hydrogen storage material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing LaH < 2.46-La > powder; the LaH < 2.46-La > powder is subjected to ball milling under the air atmosphere, and symbiotic LaH < 2.46-La2O3 powder is prepared; the preparation method comprises the following steps: carrying out ball milling on the symbiotic LaH < 2.46 >-La2O3 powder, Mg powder and Ni powder in an argon atmosphere to prepare nano composite powder; hydrotreating the composite powder; carrying out dehydrogenation treatment on the hydrogenated composite powder; the composite powder hydrogenation step and the hydrogenated composite powder dehydrogenation step are sequentially and repeatedly circulated for multiple times, and the composite powder is obtained. According to the scheme, excellent dynamic performance and cycling stability are achieved, and the composite material can be used as a hydrogen storage medium, can be used as an active medium for storing and transporting hydrogen in a solid-state hydrogen storage device, has the characteristics of high hydrogen storage density, relatively low hydrogen absorption and desorption temperature, good hydrogen absorption and desorption cycling stability, high safety, environment friendliness, low cost and the like, and has wide application prospects. And the application is not limited to a solid hydrogen storage device and can also be used as a heat exchange medium of a heat pump.

This invention relates to the field of hydrogen storage technology and discloses a micro / nano spherical CoMn2O4 hydrogen storage material catalyst. The catalyst is characterized by: dissolving cobalt and manganese sources in an ethylene glycol solution at a molar ratio of 1:2 to 2.5; adding urea and glucose and stirring until homogeneous to obtain a mixed solution; subjecting the mixture to a hydrothermal reaction at 180-220°C; centrifuging, washing, and drying to obtain a powder; and finally heating the powder in a muffle furnace at 450-850°C until oxidation is complete. The molar ratio of ethylene glycol, urea, glucose, and cobalt source is 140-150:9-11:0.2-0.3:1. When this catalyst is combined with magnesium hydride, the dehydrogenation capacity reaches 6.04 wt.% within 9 minutes at 300°C, and the hydrogen absorption capacity is 5.01 wt.% within 3 minutes at 150°C. In comparison, even with ball milling of MgH2 for 20 minutes, the hydrogen absorption capacity only reaches 4.55 wt.%. Furthermore, the composite material exhibits a high cycle life: after 100 hydrogen adsorption / desorption cycles at 300°C, the hydrogen storage capacity shows no significant change, with a capacity retention rate of 99.95%. The catalyst preparation method is simple, and the raw materials are readily available, making it suitable for large-scale production.

The present invention relates to a method of producing lithium sulfide, and according to the present invention, when producing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is performed under relatively mild conditions compared to the conventional technology, so frequent repairs or replacements due to corrosion and breakdown of reactors and piping are not required, thereby improving the economic efficiency of the process. In addition, since unreacted hydrogen sulfide and a solvent from which moisture has been removed are reused, process costs are reduced so that economic feasibility in mass production is ensured. Furthermore, moisture and water vapor generated in a lithium sulfide production reaction are effectively removed to prevent a reverse reaction into lithium hydroxide and promote a forward reaction so that high-quality lithium sulfide can be produced with high purity and high yield.

The invention relates to the technical field of fuel cells, and particularly discloses a fuel cell hydrogen supply system and a vehicle, and the fuel cell hydrogen supply system comprises an electric pile, a hydrogen inlet part and a hydrogen return part. In a first working condition (that is, the ejector is in medium and small power), one outlet of the hydrogen return pipeline is communicated with the humidifier, the other outlet of the hydrogen return pipeline is disconnected from the ejector, and the mixed gas containing humidity separated by the water-vapor separator humidifies the hydrogen discharged from the hydrogen storage bottle after passing through the humidifier; the mass and the flow of hydrogen discharged from the hydrogen storage bottle are increased, the kinetic energy is also increased, the injection capacity is also enhanced, and the hydrogen discharged from the hydrogen storage bottle is humidified by the mixed gas separated by the water-vapor separator, so that the water vapor content of the mixed gas separated by the water-vapor separator is reduced, and the hydrogen content is increased. The hydrogen injection capacity of the ejector is further improved, and the problem that the ejector of a hydrogen supply circulation system in the prior art is poor in injection effect under medium and small power is solved.

The application provides a biomass deoxidation catalytic pyrolysis cogeneration system and method, and belongs to the field of biomass pyrolysis. The system comprises, in sequence, a carbonization unit, a pyrolysis gas deoxidation unit, a carbon nanotube circulation deposition unit, a bio-oil condensation unit and a hydrogen circulation enrichment unit. The carbonization unit is used for pyrolyzing biomass to generate biochar and collecting pyrolysis gas and hydrogen-rich circulation gas. The pyrolysis gas deoxidation unit is used for deoxidizing the pyrolysis gas to obtain condensable hydrogen-rich gas and mixing the condensable hydrogen-rich gas with the hydrogen-rich circulation gas to send the mixture into the carbon nanotube circulation deposition unit, so as to perform deposition to obtain carbon nanotubes, hydrogen-rich gas and condensable gas. The bio-oil condensation unit is used for condensing the condensable gas to obtain bio-oil. The hydrogen circulation enrichment unit is used for collecting the hydrogen-rich gas and providing the hydrogen-rich circulation gas. The application can utilize biomass pyrolysis to prepare various products such as biochar, carbon nanotubes, hydrogen-rich gas and bio-oil, and further realize biomass deoxidation catalytic pyrolysis multi-product cogeneration.

The invention discloses a method and a device for calculating carbon precipitation of an H-C-O system, relates to the technical field of thermodynamic modeling and gas reaction engineering in a metallurgical process, and realizes accurate and efficient calculation of carbon precipitation of the H-C-O system. The method comprises the following steps: obtaining a gas phase conversion reaction and a carbon precipitation reaction of an H-C-O system constructed for a hydrogen-rich recycle gas system; determining an independent reaction group according to the evaluation function value of the carbon precipitation reaction and the gas phase conversion reaction; the method comprises the following steps: calculating a pre-equilibrium mole number of a substance at an initial temperature point according to an initial mole number of gas in a hydrogen-rich recycle gas system and a reaction amount of an independent reaction, and calculating an equilibrium mole number of a corresponding substance at the initial temperature point according to the pre-equilibrium mole number based on a Gibbs free energy minimum method; the equilibrium mole number of each substance at the previous temperature point is used as the initial value of the corresponding substance at the current temperature point, the equilibrium mole number of each substance at the current temperature point is calculated until the current temperature point is the final temperature point, and the substances comprise gas and solid carbon.

This invention discloses a nitrogen-doped two-dimensional layered material supported on cobalt hydrogen storage catalyst, a hydrogen storage material containing the catalyst, and a preparation method thereof, belonging to the field of hydrogen storage technology. The hydrogen storage catalyst is an N-doped Ti3C2T catalyst. x MXene-supported Co, when combined with magnesium hydride, exhibits excellent catalytic performance: in terms of hydrogen desorption kinetics, MgH2-N-doped Ti3C2T... x The MXene-supported Co composite hydrogen storage material exhibited a hydrogen dehydrogenation rate of 6.50 wt.% within 12 minutes at 300℃; when the dehydrogenation temperature decreased to 260℃, the composite hydrogen storage material released 6.01 wt.% hydrogen within 50 minutes. Furthermore, the initial hydrogen release temperature of this composite hydrogen storage material was 110.8℃ lower than that of pure MgH2. Regarding hydrogen absorption kinetics, MgH2-N doped Ti3C2T... x The MXene-supported Co composite hydrogen storage material exhibited a hydrogen absorption capacity of 6.14 wt.% at 150 °C for 30 min. Additionally, the MgH₂-N-doped Ti₃C₂T₅... x The MXene-supported Co composite hydrogen storage material exhibits a high cycle life, retaining 95.38% of its capacity after 50 hydrogen adsorption / desorption cycles. The catalyst is simple to prepare, and the raw materials are readily available, making it suitable for large-scale production.

The application discloses a distillate oil hydrofining catalyst and a preparation method and application thereof. The distillate oil hydrofining catalyst comprises a catalyst carrier and an active component. The catalyst carrier comprises phosphorus-modified SBA-15 molecular sieve and / or titanium-modified SBA-15 molecular sieve. The active component comprises Group 6B metal oxide and / or Group 8 metal oxide. The catalyst is suitable for the hydrofining of petroleum distillate oil at 150 DEG C to 400 DEG C, and is particularly suitable for the hydrofining of catalytic cracking hydrogen circulation oil with high contents of sulfur, nitrogen and aromatic hydrocarbons and low cetane number. The catalyst can reduce the contents of sulfur, nitrogen and aromatic hydrocarbons under relatively mild hydrofining conditions, and greatly improves the cetane number of products.

The application provides an experimental device and method for testing the performance of a non-metal hydrogen conveying pipeline, and relates to the technical field of hydrogen conveying.The hydrogen is pressurized by a circulating compression unit, enters a second non-metal hydrogen conveying test pipeline, a third non-metal hydrogen conveying test pipeline and a fourth non-metal hydrogen conveying test pipeline, is depressurized by a pressure regulating and metering unit, returns to the circulating pressurization module through a first non-metal hydrogen conveying test pipeline or a hydrogen conveying pipeline provided with a first valve to drive a hydrogen conveying circulation loop, and then the performance of each non-metal hydrogen conveying test pipeline is tested, hydrogen permeation is tested through a hydrogen permeation monitoring unit, and joint hydrogen leakage is tested through a flange joint leakage monitoring unit. Thus, the experimental device formed by the non-metal hydrogen conveying test pipelines realizes hydrogen conveying circulation, and the performance test of the non-metal hydrogen conveying pipeline, the hydrogen permeation test and the joint leakage test are carried out during the hydrogen conveying circulation, so that in-situ measurement simulation is realized.

The application discloses a hydrogen liquefaction system adopting cascade refrigeration and a separated continuous converter, and belongs to the technical field of refrigeration and cryogenics. The system comprises a normal-pressure precooling cold box, a vacuum deep cooling cold box, a low-temperature adsorber, a compressor set and an expander set. Propylene / carbon dioxide cascade refrigeration is adopted in the precooling section to assist nitrogen cycle refrigeration, and improved double-pressure hydrogen cycle refrigeration is adopted in the deep cooling section. After being cooled by a plurality of heat exchangers and throttled by a terminal throttle valve, raw hydrogen is liquefied. In the product hydrogen passage of the plate-fin heat exchanger in the vacuum deep cooling cold box, normal and secondary hydrogen conversion catalysts are filled and separated from the main heat exchanger, so that the content of secondary hydrogen in the liquid hydrogen product is not less than 98%, 13-25 tons of liquefied hydrogen can be produced per day, and the specific energy consumption of the system is not more than 9.5 kWh / kg of liquid hydrogen. The hydrogen liquefaction system has low energy consumption, the precooling cold box and the deep cooling cold box adopt different design schemes, the continuous converter is separated from the main heat exchanger, and the operation cost, equipment cost and maintenance cost are reduced.

This invention relates to a circulating methanol purification system and process. The system includes at least one distillation-hydrogenation loop, which comprises a methanol distillation column and a hydrogenation reactor connected in a loop. The feed inlet of the hydrogenation reactor is connected to the top outlet of the methanol distillation column, and the feed inlet of the hydrogenation reactor is connected to a hydrogen source. The process includes the following steps: passing an aqueous methanol solution containing impurities into the methanol distillation column, removing impurities such as aldehydes and ketones from the top of the column; removing the concentrated impurities through the hydrogenation reactor, and returning the hydrogenation product to the methanol distillation column for fusel oil separation; collecting high-purity methanol from the side stream of the methanol distillation column, further removing remaining trace impurities, especially aldehydes, through an ion exchanger; the purified methanol can be recycled. Using the purification process of this invention, impurities in the circulating methanol are concentrated, the process is simple with low investment, the impurity conversion rate is high, the service life of the epoxidation catalyst can be significantly extended, and product quality can be improved.

This invention discloses a method and apparatus for calculating carbon deposition in an H-C-O system, relating to the fields of thermodynamic modeling of metallurgical processes and gas reaction engineering technology. It achieves accurate and efficient calculation of carbon deposition in H-C-O systems. The method includes: obtaining the gas-phase conversion reaction and carbon deposition reaction of an H-C-O system constructed from a hydrogen-rich circulating gas system; determining independent reaction groups based on the evaluation function value of the carbon deposition reaction and the gas-phase conversion reaction; calculating the pre-equilibrium moles of substances at an initial temperature point based on the initial mole number of gases in the hydrogen-rich circulating gas system and the reaction amounts of the independent reactions; calculating the equilibrium moles of the corresponding substances at the initial temperature point based on the Gibbs free energy minimum method; using the equilibrium moles of each substance at the previous temperature point as the initial value for the corresponding substance at the current temperature point; calculating the equilibrium moles of each substance at the current temperature point; and so on, until the current temperature point is the final temperature point. The substances include gaseous and solid carbon.

This invention discloses a gas turbine self-blending hydrogen cycle power generation system and method based on chemical regeneration, including a compressor, combustion chamber, turbine, generator, methane diversion valve, steam generator, preheater, reforming reactor, condenser, gas-liquid separator, hydrogen membrane separator, hydrogen storage tank, and hydrogen blending control valve. Through hydrogen membrane separation, hydrogen storage buffering, and precise control of the hydrogen blending ratio, the actual hydrogen content in the combustion chamber is actively adjusted to a safe range, fundamentally eliminating the risks of backfire and combustion oscillation, and ensuring long-term stable operation of the system. Secondly, by condensing, separating, and recirculating unreacted water vapor from the syngas to the reforming reactor, the water-to-carbon ratio is significantly improved, enhancing the methane reforming conversion efficiency under medium- and low-temperature flue gas heating conditions. Finally, the aforementioned water recirculation mechanism forms a closed loop of water resources within the system, significantly reducing dependence on external water replenishment and achieving synergistic and efficient utilization of energy and resources.

The invention relates to a green fluorobenzene synthesis process adopting nitrosyl sulfuric acid for diazotization reaction. The green fluorobenzene synthesis process comprises the following steps: reacting hydrofluoric acid aniline salt with nitrosyl sulfuric acid at-5-5 DEG C for 15-60 minutes to obtain diazonium salt; and heating to 5-40 DEG C by a program, carrying out thermal decomposition, and carrying out water vapor distillation and normal-pressure rectification to obtain fluorobenzene with the purity of more than or equal to 99.5%. Carrying out reduced pressure distillation on fluorine-containing waste sulfuric acid generated by the reaction at 120-125 DEG C to recover hydrogen fluoride for recycling, and adding SO3 into residual acid for purifying to obtain sulfuric acid of which the concentration is greater than or equal to 91%. After the tail gas is subjected to multi-stage spraying treatment, the HF is less than or equal to 3mg / m < 3 > and then is Compared with a traditional anhydrous HF process, the method has the advantages that the HF outsourcing amount is reduced by more than or equal to 70%, the waste acid recycling rate is more than or equal to 95%, the fluorobenzene yield is more than or equal to 95%, and the method is intrinsically safe, low in cost and suitable for intermittent or continuous production.