122results about How to "High purity hydrogen" patented technology

The process of preparing high purity hydrogen with liquid hydrocarbon in a palladium film reactor adopts Ni base catalyst with high activity at low temperature to obtain liquid hydrocarbon converting rate near 100 % at the conditions of 450-550 deg.c temperature and carbon space velocity as high as 30,000/hr, and uses high performance composite metal palladium film simultaneously at the conditions of 500-600 deg.c temperature and carbon space velocity as high as 2000/hr for timely separating hydrogen generated through water vapor reformation of liquid hydrocarbon to avoid methanation reaction, so as to obtain methane selectivity lower than 3 % and hydrogen selectivity higher than 97 % and obtain high pure hydrogen in the permeation side of the palladium film. The present invention has low hydrogen producing cost and may be used widely in hydrogen refilling station and small dispersed power station.

A fuel processing system is provided wherein heat is transferred from a reformate flow (32) downstream from a water-gas shift (38) to both a) a combustor feed flow (40) that is supplied to a combustor (25); and b) a water flow (26) that is supplied to a reformer feed mix (34) for a steam reformer (28).

The invention discloses an online high-purity hydrogen preparation system for a fuel cell. The online high-purity hydrogen preparation system comprises a methyl alcohol box as well as a raw material box and a catalytic burner which are connected with the methyl alcohol box through a methyl alcohol metering pump, wherein a fuel cell discharge water inlet is formed in the raw material box, an oxygen inlet is formed in the catalytic burner, an ethanol water metering pump and a heat exchanger are sequentially connected onto the raw material box, a vaporizer is connected onto the heat exchanger, a reforming reactor is connected onto the vaporizer, a palladium film purifier is connected onto the reforming reactor, and the palladium film purifier is connected with the catalytic burner; the invention further discloses a control method of the system. According to the system provided by the invention, online hydrogen supplying is performed through a manner of using a methanol water reforming reaction to produce hydrogen, the yield of pure hydrogen is controlled through adjusting the flow of an ethanol water mixture; the method has the characteristics of high hydrogen storage density, high hydrogen purity, low energy consumption, compact structure, simpleness and convenience in start-stop controlling, easiness in implementing modular design and the like.

The invention relates to a device for preparing hydrogen through hydrolysis and belongs to the technical field of hydrogen preparation. The device comprises a storage tank, a reactor, a condenser and a drier and is characterized in that the storage tank is used for storing solid reactant and connected to a driving mechanism; the driving mechanism is communicated with a hydrolysis reactor provided with a hydrogen outlet; and the hydrogen outlet is provided with a pipeline sequentially communicated with the condenser and the drier. The device of the invention has the advantages of simple structure, rapid hydrogen preparation, controllable rate, high hydrogen purity, low pollution level, low manufacturing cost, high safety and reliability, good controllability wide applicable range, convenient popularization and application and the like.

The invention relates to a catalyst applied to catalyst hydrogen generation and a method of the catalyst hydrogen generation. The catalyst comprises industrial catalyst YWC-95 and CaO. The catalyst is used in steam catalytic reforming reaction of the catalyst hydrogen generation, the technical process of the catalyst hydrogen generation is shortened, hydrogen purity and production rate are improved and no secondary pollutant is generated in the production process.

A device for sealing a rotating shaft that penetrates a stationary housing wall has a sealing ring fastened to the housing wall and arranged between the housing wall and a shaft. The sealing ring has sealing oil supply bores supplying sealing oil into a sealing gap formed between an inner wall surface of the sealing ring and an outer wall surface of the shaft. The inner wall surface has pocket-shaped recesses where the sealing oil supply bores open. The pocket-shaped recesses extend in the circumferential direction of the sealing ring. The inner wall of the sealing ring has at least one circumferential boundary stay that delimits and seals the pocket-shaped recesses in an axial direction of the sealing ring toward the first or second housing side. The inner wall surface of the sealing ring has a circumferential groove that connects the pocket-shaped recesses to one another.

The invention relates to a novel optical electrolytic cell structure, and particularly relates to an improvement on the basis of a three-electrode system, with a membrane electrode assembly being applied therein and an intermediate membrane layer being a solid polymer alkaline membranes. The device can directly perform on-line separation on hydrogen and oxygen produced by photoelectrocatalysis of water, prevents after-treatment processes of a conventional separation device for the hydrogen and oxygen, increases security of a system and greatly saves energy consumption. Besides, the structure has good stability. The novel optical electrolytic cell structure is compact in structure and compared with the three-electrode system, size is greatly reduced under the same illumination area.

A shaft sealing arrangement includes at least two seal rings radially enclosing a rotating shaft so as to define a clearance between the shaft and the at least two seal rings. A sealing oil supply channel is disposed between the at least two seal rings and a pump is configured for pumping a sealing oil through the sealing oil supply channel in a radial direction towards the shaft so that the sealing oil subsequently flows through the clearance in a first axial direction toward a first side of the sealing arrangement and in a second opposite axial direction toward a second side of the sealing arrangement. The sealing oil is collected on the first and second sides and at least partially reintroduced into the sealing oil supply channel. At least one seal ring includes a sealing oil return channel and at least a portion of the sealing oil flowing through the clearance exits the clearance in a radial direction through the sealing oil return channel and is at least partially collected and reintroduced into the sealing oil supply channel.

The invention discloses a method for recovering ethylene and hydrogen from refinery dry gases by combining membrane separation and cold oil absorption. The method has the advantages and beneficial effects that main components such as hydrogen, ethylene and the like are obtained from the refinery dry gases through the steps of compression and pressure increase, cold oil absorption, membrane separation, desorption, normal coarse distillation and the like; the main components are clearly separated; meanwhile, under the actions of cold oil absorption and membrane separation, the purity of various components can be more than 99%, the yield of hydrogen can reach 90-95%, and the yield of ethylene is 92-98%; the whole recovery flow is reasonable; the method has the characteristics of high yield, high purity, low operating cost and relatively low energy consumption.

The invention provides a water electrolysis hydrogen production control method and system and a controller. According to the scheme, the method comprises the steps: controlling the working state of an electrolytic cell according to the concentration of hydrogen generated by the electrolytic cell, and controlling the on-off state of at least one power switch when the concentration of hydrogen exceeds a target concentration range so as to adjust the number of electrolysis cells participating in hydrogen production in the electrolytic cell; equivalently, the power required by the electrolytic cell is adjusted so that the hydrogen concentration generated by the electrolytic cell is changed, and finally, the hydrogen production concentration of the electrolytic cell is stabilized within a target concentration range. According to the scheme, the working state of the electrolytic cell is dynamically adjusted according to the hydrogen production concentration of the electrolytic cell, electric energy generated by a renewable energy power generation system in a weak power generation area is fully utilized, and hydrogen yield and hydrogen purity are improved.

The invention discloses a fuel cell testing system capable of performing circular electrolytic hydrogen production. The fuel cell testing system comprises a DC/DC power converter, an electrolytic hydrogen production mechanism, a power distribution mechanism, a hydrogen purification device, a hydrogen cylinder and an upper computer, wherein the power distribution mechanism comprises a power distribution cabinet with a PLC, one input end of the power distribution cabinet is connected with the output end of the DC/DC power converter, and the other input end of the power distribution cabinet is connected with a mains supply. The output end of the power distribution mechanism is connected with the input end of the electrolytic hydrogen production mechanism. A hydrogen inlet of the hydrogen purification device is communicated with a hydrogen outlet of the power distribution mechanism. The hydrogen outlet of the power distribution mechanism is in pipe communication with a fuel cell hydrogen supply system in a fuel cell testing table through a first one-way valve. The output port of the hydrogen cylinder is in pipe communication with the fuel cell hydrogen supply system in the fuel cell testing table through a second one-way valve. The upper computer is respectively connected with the fuel cell testing table, the DC/DC power converter and the PLC. The outlet pressure of the first one-way valve is higher than the outlet pressure of the second one-way valve. The hydrogen electrolyzed by the fuel cell testing system is high in purity and stable in quality.

The invention relates to applications of a catalyst and a device in a reaction for preparing high-purity hydrogen through an electrocatalytic water-vapor shift reaction. According to the invention, based on the application, a process for converting carbon monoxide and water into hydrogen and carbon dioxide at a normal temperature under a normal pressure is achieved, the purity of the cathode product hydrogen is up to 99.99%, and the separation is not required; and the method is mild in reaction conditions, the cathode product and the anode product are completely separated, the obtained hydrogen is high in purity and is not required to be further separated, and the energy efficiency of the whole reaction is high.

The invention discloses a process for producing arene through continuous reforming. The process comprises the following steps: pre-hydrogenation treatment is performed on a naphtha raw material, catalytic reforming is performed on the oil generated through pre-hydrogenation treatment so that at least a part of paraffin and a part of cycloparaffin are converted to arene, selective hydrodealkylation is performed on the oil generated through catalytic reforming, the oil generated through selective hydrogenation is separated to obtain arene; a part of the gas with rich hydrogen, generated by catalytic reforming device is circulated to the catalytic reforming device and the residual gas is pressurized to perform selective hydrogenation reaction with the oil generated through catalytic reforming to remove the olefin in the oil, wherein the selective hydrogenation of the oil generated through catalytic reforming adopts hydrogen single-pass flow, the effluent of the selective hydrogenation reaction is separated to gaseous phase and liquid phase; a part of gaseous phase is used as the hydrogen make-up of the naphtha raw material pre-hydrogenation device, the rest part is discharged out of the device; and the liquid phase is used for the separation of the arene product. Compared with the prior art, the method disclosed by the invention has the advantages that the raw material adaptability is high, the byproduct discharged to the outside has high hydrogen content and the economy of the catalytic reforming device is high and the like.

The invention relates to a hydrogen gas separation and purification material. The material is prepared from rare-earth elements and other metal elements and can be prepared by adopting vacuum induction melting, and the preparation process is simple. The purification material can selectively adsorb hydrogen gas and repel other impurities, so that the purification of the hydrogen gas can be achievedin a hydrogen gas adsorption and desorption manner and can be carried out at room temperature; and the purity of the hydrogen gas can be improved to 99.999% or more in one time, so that the materialis suitable for providing high-purity hydrogen gas for industries of electronic information, semiconductors, LED, photovoltaic power generation, fuel cells and the like.

A reforming apparatus for fuel cells capable of effectively removing carbon dioxide at a high temperature from a reformed gas which is produced by a steam reforming method, and of producing high-purity hydrogen gas with a high hydrogen conversion rate. A reforming apparatus for fuel cells includes a reformer for steam-reforming a raw material to produce hydrogen, and carbon dioxide removing apparatus for removing carbon dioxide gas by absorbing carbon dioxide from a reformed gas, which is produced by steam reforming in the reformer, using a material containing Ba₂TiO₄ as a main component as a carbon dioxide absorbent. The reforming apparatus for fuel cells may further include a second reformer for steam-reforming again the reformed gas from which carbon dioxide gas has been removed by the carbon dioxide gas removing means. Alternatively, the reformer for steam reforming may enclose the carbon dioxide removing apparatus which uses the carbon dioxide absorbent containing Ba₂TiO₄ as a main component so that carbon dioxide produced by steam reforming is removed by absorption within the reformer.

The invention discloses a catalyst sulfurization method of a diesel hydrotreating technique, which comprises the following steps: normally operating a high-sulfur diesel hydrotreating device; (2) filling an oxidation-state diesel hydrogenation catalyst into the diesel hydrotreating reactor; (3) regulating the desulfurization rate of a recycle-hydrogen hydrogen sulfide remover in the high-sulfur diesel hydrotreating device; (4) introducing the hydrogen-sulfide-containing gas discharged from the recycle-hydrogen hydrogen sulfide remover of the high-sulfur diesel hydrotreating device into the hydrotreating device, and sulfurizing the catalyst of the diesel hydrotreating device; (5) sulfurizing according to the normal sulfurization conditions of the diesel hydrotreating device; and (6) after the sulfurization is finished, carrying out recycle hydrogen recycling operation of the diesel hydrotreating device, regulating the reaction temperature, and switching to raw oil to carry out the diesel hydrotreating reaction. The method disclosed by the invention can enhance the sulfurization efficiency and reduce the consumption of the sulfurizing agent.

The invention relates to a device and a technique of producing liquid ammonia by coke oven gas and methanol relief gas. A methanol relief gas material pipe is connected with a relief gas hydrogen extraction system; the relief gas hydrogen extraction system is connected with a desorption gas compressor and a hydrogen-nitrogen combination compressor; the hydrogen-nitrogen combination compressor is connected with a deoxidizing drying device, a nitrogen material pipe and an ammonia synthesis system; the ammonia synthesis system is respectively connected with an ammonia synthesis circulator, an ice machine system and a liquid ammonia spherical-tank; the coke oven gas material pipe is connected with the combination compressor; the combination compressor is connected with an active carbon rough-distillate device; the active carbon rough-distillate device is connected with a temperature change absorption system; the temperature change absorption system is connected with the coke oven gas hydrogen extraction system; the coke oven gas hydrogen extraction system is connected with a hydrolysis fine-desulfurization system; the hydrolysis fine-desulfurization system is connected with the deoxidizing drying device; the deoxidizing drying device is further connected with the combination compressor; and the combination compressor is further connected with the hydrogen-nitrogen combination compressor.

The invention discloses an alloy which is used for preparing hydrogen and a preparation method hereof. The alloy consists of cubic beta phase AlLi, cubic beta phase AlLi and Al<2>Li<3> of three-square rhombus structure or cubic beta phase AlLi and Al<2>Li<3> of three-square rhombus structure and a single inclined Al<4>Li<9>. Lithium and aluminum are proportioned and mixed according to quality percent content and then the mixture is melted in a vacuum melting device; the melting temperature is higher than that of the melting point of pure aluminum and after the mixture is melted totally, the temperature is reduced to one which is higher than the melting point of the mixed alloy for heat preservation in a fusant state; and then the fusant is cooled until the normal temperature. The mixed alloy and water contact and react to produce high-purity hydrogen. The process for preparing alloy with the invention is simple and convenient and the process of preparing hydrogen through the reaction of alloy and water is fast and safe; the prepared hydrogen is provided with high purity and the hydrogen can be used for various application fields of hydrogen, in particular for hydrogen supply of fuel battery, hydrogen fuel battery used for portable tools and hydrogen gas engine automobile.

The invention provides a method of producing hydrogen energy through physical ball milling of metal powder. The method comprises: putting metal powder into a vacuum ball mill, adding a small amount ofa metal chloride aqueous solution and an aid into the powder and carrying out wet ball milling in a hydrogen protective atmosphere so that the oxide layers or hydroxide formed by the reaction is peeled from the metal powder under the action of ball milling. Through use of the aid in the metal powder-based hydrogen production and physical ball milling, the oxide/hydroxide film formed in the hydrolysis hydrogen production reaction is peeled from the metal powder so that the hydrogen production yield and the reaction rate are effectively ensured. The whole process is simple, the reaction processis neutral, the equipment requirements are low and the production cost is low.

The invention discloses a method and a device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor. Sawdust charcoal is used as a raw material, and water vapor is used as a gasification medium, so as to prepare the hydrogen-enriched fuel gas. The method mainly comprises the following steps: helical feeding of sawdust charcoal, generation of water vapor, gasification of sawdust charcoal and cooling of hydrogen-enriched fuel gas. The water vapor is supplied by a water vapor generator in the early stage; after the system is stabilized, the water vapor is supplied by a waste heat recycling device; the temperature of a reactor is 800 to 950 DEG C; and the hydrogen-enriched fuel gas is prepared under technological conditions of proper reaction temperature, flow of the water vapor, particle size of the raw material, reaction time and the like. According to the method, the hydrogen-enriched fuel gas with the hydrogen volume percentage of 61.2 to 65.8 percent and the maximum hydrogen yield of 113.5 mmol/g can be prepared. The method has the advantages that the hydrogen volume percentage of the fuel gas is high, no tar is generated, and the gasification device is simple in structure; and the hydrogen-enriched fuel gas can be applied to preparation of high-purity hydrogen, synthesized natural gas, liquid fuel including methyl alcohol and dimethyl ether, and the like.