76results about How to "Improve hydrogen utilization" patented technology

In order to increase the hydrogen utilization rate of the cascade storage system, after dispensing gaseous hydrogen to a hydrogen vehicle, gaseous hydrogen is transferred via a compressor from at least one storage vessel at a lower pressure to at least one storage vessel at a higher, dispensable pressure. The methods of the present invention economically and efficiently increase the utilization rate of gaseous hydrogen stored in a cascade storage system by managing the storage of gaseous hydrogen and increasing the utilization rate of gaseous hydrogen stored in a cascade storage system.

A method for preparing a cyclohexane comprises the following steps: a benzene and a hydrogenation catalyst are driven to enter a distillation tower from the tower top and the hydrogen goes into the distillation tower from the tower bottom; the tower bottom is heated by the steam and a reaction in which the benzene hydrogenation is used for generating the cyclohexane is conducted in the tower; the condensate at the tower top refluxes and the discharged materials from the tower bottom are subject to the flash separation so as to obtain the cyclohexane. The method of the invention can lower the content of the methyl cyclopentane in the products and is beneficial to the stabilized operation and the enhancement of the hydrogen utilization ratio and the effective reaction volume of the tower.

The invention discloses a method for increasing the hydrogen utilization ratio of guaiacol during hydrodeoxygenation under the normal pressure and reducing carbon atom loss. The method is characterized by comprising the following steps: gasifying guaiacol, and mixing the gasifed guaiacol with hydrogen for reaction under the catalysis of an activated molecular sieve at the normal pressure with the temperature of 250-400 DEG C; while hydrodeoxygenation, allowing a methyl group on guaiacol to return to a benzene ring structure through transmethylation, so as to reduce the carbon atom loss and increase the hydrogen utilization ratio, wherein the activated molecular sieve is selected from Fe / Ni / HBeta, Fe / Ni / ZSM-5, Fe / Ni / HY, Fe / Ni / MCM-41, Fe / Ni / SiO2 or Fe / Ni / Al2O3. Through adoption of the method, the acquired BTX yield can reach up to 19.83%. In the method, an autoclave is eliminated, a transmethylation reaction is realized while hydrodeoxygenation, the carbon atom loss and hydrogen consumption are reduced, and a new way is provided for resource utilization of lignin under the normal pressure.

The invention discloses a preparation method of a bi-functional catalyst of a (Ru / MeOx)@MeOx core-shell structure. The method is characterized in that a center suitable for surface catalyzing is formed by core phase Ru / MeOx and shell phase m-MeOx. A ruthenium-based catalyst prepared by the method has high dispersing performance, so that benzene is dissociated and absorbed more easily at a lower temperature to improve the conversion rate of the benzene;the cyclohexene is allowed to be desorbed on a shell by a hydrophilic m-MeOx shell phase to prevent further hydrogenation and improve the selectivity of the cyclohexene, the loss of activated species can be reduced by the core-shell structure to allow the catalyst to be more stable, the mass transfer resistance can be reduced, the excellent composite performance can be applied to part of hydrogenation cyclohexene reaction of benzene, and extremely high selectivity and yield are obtained. The preparation method is simple, the conditions are mild, the repeating is easy, and the method is suitable for large-scale industrial production.

The invention discloses a device for advanced reduction pretreatment wastewater. The device comprises a pre-mixing zone, a reaction zone and a separation zone from bottom to top, wherein a water inletpipeline and a gas inlet pipeline are distributed inside the pre-mixing zone; a plurality of water outlet holes are formed in the water inlet pipeline; a plurality of aeration holes are formed in thegas inlet pipeline; hydrogen and polluted water are mixed in the pre-mixing zone to form a gas-water mixture; a gas-water mixing distribution plate is arranged between the reaction zone and the pre-mixing zone; a catalyst fixing bed is arranged in the reaction zone; an MOFs (metal organic framework) solid catalyst is positioned in the fixing bed; the gas-water mixture is reacted with the MOFs solid catalyst in the catalyst fixing bed to implement water body repairing on the polluted water; the separation zone is provided with a three-phase separator and comprises a gas collection cover and aguide block; the top of the gas collection cover communicates with an exhaust pipeline for discharging excessive hydrogen; and the top of the separation zone is the overflowing surface of water flowsafter reactions. When being adopted for repairing of organic polluted water bodies, the device has the advantages of being high in efficiency, free of selectivity, environment-friendly, free of secondary pollution, and the like, and is applicable to treatment of various types of organic wastewater.

The invention relates to the technical field of hydrogenation, and provides a hydrogen utilization system and method for a hydrogen storage cylinder group of a hydrogen refueling station. The hydrogenutilization system comprises a TT vehicle, a gas unloading cabinet, a hydrogen compressor, a hydrogenation machine, a low-pressure gas storage bottle, a medium-pressure gas storage bottle, a high-pressure gas storage bottle, a first gas valve, a second gas valve, a third gas valve, a fourth gas valve, a fifth gas valve, a sixth gas valve, a seventh gas valve and an eighth gas valve. According tothe hydrogen utilization system and method, multiple working modes are provided, so that the hydrogen refueling station can meet various hydrogen refueling scenes; and when the air pressure of hydrogen in the gas storage bottles is lower than a certain value and the hydrogen cannot be normally injected into a hydrogen energy automobile, the residual hydrogen in the gas storage bottles is pressurized through the hydrogen compressor, so that the residual hydrogen in the gas storage bottles can also be normally injected, and the hydrogen utilization rate of the gas storage bottles is increased.

The invention discloses a heavy oil separation-hydrotreatment-catalytic cracking combined method. the method comprises the following steps: a, separating heavy oil to obtain a component S, a component A1, a component A2 and a component A3; and b, carrying out a first catalytic cracking reaction on the component S obtained in the step a, so as to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; carrying out a second catalytic cracking reaction on the component A1 obtained in the step a, so as to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; carrying out a third catalytic cracking reaction on the component A2 obtained in the step a, so as to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; and carrying out a hydrotreatment reaction on the component A3 obtained in the step a under the action of a hydrotreating catalyst, so as to obtain hydrogenated oil. In comparison with the prior art, the method for heavy oil treatment and the subsequent catalytic cracking reactions has advantages of higher yield of gasoline and liquefied gas and lower sulfur / nitrogen content of gasoline.

The invention discloses a method for synthesizing gamma-valerolactone through hydrogenation of methyl levulinate under the catalysis of a cobalt-based hydrogenation catalyst Co / ZrO2-Nb2O5. The catalyst has the advantages of high catalytic activity, good reusability, difficulty in loss of active components, easiness in separation from a liquid product and the like; when a mass ratio of the catalystto the reaction raw material methyl levulinate to the reaction solvent isopropanol is 0.2: 1: 20, a reaction temperature is 200 DEG C, and reaction time is 2 hours, the molar yield of the obtained hydrogenation product gamma-valerolactone is 98.32%, and the mass percent of the purity of the product is 99.01%.

The invention relates to the technical field of germanium recovery and extraction, and particularly discloses equipment and method for enriching germanium in low-grade germanium concentrate through two-stage reduction volatilization. The equipment comprises nitrogen supply equipment, a rotary volatilization furnace, a vertical reduction furnace and a bag collector which are connected in sequence, wherein the vertical reduction furnace is further connected with a hydrogen supply device and a hydrochloric acid treatment pond. The method comprises the following steps: crushing low-grade germanium concentrate, then adding a reducing agent, uniformly mixing, and then putting into a rotary volatilization furnace; firstly carrying out oxidizing roasting volatilization in the rotary volatilization furnace to remove substances being volatile at a low temperature; then heating the rotary volatilization furnace, and carrying out first-stage reduction volatilization on germanium; feeding the volatilized germanium into a vertical reduction furnace, and introducing hydrogen for reduction to obtain germanium-containing solid particles; and adding hydrochloric acid for reacting to obtain germanium metal. The two-stage germanium enrichment process is adopted, so that the enrichment multiple of secondary enrichment of the germanium concentrate and the grade of the germanium concentrate are improved, and the problems that the recovery rate is reduced, the cost is high, and the environmental influence is large in the subsequent process of germanium extraction through chlorination are solved.

The present invention discloses a high octane number gasoline production method, which is used for processing catalytic diesel fuel so as to produce the high octane number gasoline distillate, wherein the process mainly adopts a reaction distillation tower and a hydrogen circulation system, the stripping section of the reaction distillation tower adopts a hydrocracking catalyst as a filler, the rectification section is provided with the rectification tower plate, the tower plate is provided with an isomerization catalyst, the tower bottom oil is circulated to the material inlet of the tower, a hydrogen circulation heating furnace is arranged, the heated hydrogen gas enters the bottom portion of the tower, the gasoline distillate is obtained from the top of the tower, and a small amount (less than 2%) of the diesel fuel distillate is periodically discharged from the bottom of the tower. According to the method of the present invention, the characteristics of the hydrocracking and the reaction distillation process are completely utilized, such that the secondary cracking reaction of the light distillate is reduced, the liquid yield is increased, and the gasoline distillate yield is more than 90%. With the method of the present invention, the catalytic diesel fuel is completely catalyzed, the octane number of the produced is high, and compared with the conventional hydrogenation process, the method of the present invention has characteristics of simple process and energy saving.

The invention discloses a method for increasing the hydrogen utilization ratio of guaiacol during hydrodeoxygenation under the normal pressure and reducing carbon atom loss. The method is characterized by comprising the following steps: gasifying guaiacol, and mixing the gasifed guaiacol with hydrogen for reaction under the catalysis of an activated molecular sieve at the normal pressure with the temperature of 250-400 DEG C; while hydrodeoxygenation, allowing a methyl group on guaiacol to return to a benzene ring structure through transmethylation, so as to reduce the carbon atom loss and increase the hydrogen utilization ratio, wherein the activated molecular sieve is selected from Fe / Ni / HBeta, Fe / Ni / ZSM-5, Fe / Ni / HY, Fe / Ni / MCM-41, Fe / Ni / SiO2 or Fe / Ni / Al2O3. Through adoption of the method, the acquired BTX yield can reach up to 19.83%. In the method, an autoclave is eliminated, a transmethylation reaction is realized while hydrodeoxygenation, the carbon atom loss and hydrogen consumption are reduced, and a new way is provided for resource utilization of lignin under the normal pressure.

The invention discloses a hydrotreating method of a heavy hydrocarbon raw material. The method comprises the following steps: at least one up-flow reactor and at least one down-flow fixed bed reactorare connected in series, a heavy hydrocarbon raw material is sequentially enable to pass through the up-flow reactor and the down-flow fixed bed reactor, and effluent of the down-flow fixed bed reactor is separated to obtain products; wherein the up-flow reactor is at least filled with a hydrotreating catalyst provided by the invention, a hydrotreating catalyst carrier at least comprises seven channels penetrating through the carrier; the first channel, the second channel and the third channel penetrate through the sphere center of the catalyst carrier and are communicated with one another, every two channels are perpendicular to each other, the fourth channel, the fifth channel, the sixth channel and the seventh channel are connected end to end and communicated, and the total volume of the channels accounts for 20%-60% of the volume of the spherical carrier. According to the method, the overall performance of the catalyst can be improved, the catalytic performance synchronization of the up-flow catalyst and the fixed bed catalyst is realized, the catalytic activity is improved, and the operation period is prolonged.