922 results about "High pressure hydrogen" patented technology

A process has been developed for producing diesel boiling range fuel from renewable feedstocks such as plant and animal fats and oils, the process providing for sulfur management. The process involves catalytically treating a renewable feedstock by hydrogenating and deoxygenating to provide a hydrocarbon fraction useful as a diesel boiling range fuel. The hydrocarbon fraction is isomerized to improve cold flow properties. A selective separation such as a hot high pressure hydrogen stripper is used to remove at least the carbon oxides from the first zone effluent before entering the isomerization zone, and to provide liquid recycle to the treating zone at pressure and temperature. A vapor stream is separated from the isomerization effluent and at least carbon dioxide is removed using at least one selective or flexible amine solution absorber. The resulting hydrogen-rich stream is recycled to the deoxygenation reaction zone

A process has been developed for producing a diesel boiling point range product and an aviation boiling point range product from renewable feedstocks such as plant and animal oils. The process involves treating a renewable feedstock by hydrogenating and deoxygenating to provide a hydrocarbon fraction which is then isomerized and selectively cracked to form the diesel boiling point range product and the aviation boiling point range product. A portion of the diesel boiling point range product, aviation boiling point range product, naphtha product, LPG, or any combination thereof can be optionally used as a rectification agent in the selective hot high pressure hydrogen stripper to decrease the amount of product carried in the stripper overhead.

The invention relates to a gas filling system for a high-pressure hydrogen filling station, which comprises a control system, a sampling system, a filling system, an alarm system and a nitrogen purging system, and is the gas filling system which can collect hydrogen sample of the hydrogen filling station and fill high-pressure hydrogen for fuel cell powered vehicles. The gas filling system has the functions of temperature automatic compensation of filling measurement, selectable gas taking procedure in three-stage order, reasonable control of filling rate, alarm of hydrogen leakage and automatic power-down, pulling out prevention and automatic static release in the filling process, overpressure protection of the system, and so on. The sampling points are designed at the tail end of the whole flow of the hydrogen filling station, so that the acquired hydrogen sample can have more representativeness in quality; and through the design of pressure regulation treatment on the high-pressure hydrogen for sampling, the sampling operation is more simple, convenient and quick, and a regular gas sampling steel bottle can also be used together, thereby the sampling cost is low. The gas filling system can improve the gas taking rate of the hydrogen filling station and ensure that the temperature rise of a filled vehicle hydrogen storage tank is strictly controlled within the required temperature range in the quick hydrogen filling process.

A low consumption and intelligent safe gas-supply system for gas tanks comprises: at least two gas tanks and gas tank valves installed on them, charge valves with check valve, at least two gas-filled parallel unit pipes, high-pressure sensor, at least two gas-supply parallel unit pipes, gas-supply main conduit, reset pressure sensor, at least two solenoid valves with check valve, and electronic control module ECM. The invention has the characteristics such as the gas tanks supply gas in sequence, intelligent control, security and reliability for use, low consumption, high display precision for gas volume, decompression transfinite alarm and convenience for installing, use and maintenance etc., and it can be used in the vehicle hydrogen supply system in the fuel cell vehicles or the vehicle compressed natural gas-supply system in the natural gas vehicles, and also the high-pressure hydrogen or natural gas-supply system for gas tanks on the ground.

An apparatus and method to produce hydrogen gas a high pressure is disclosed. An electrolyzer is located inside a pressure vessel that is pressurized with high pressure water. The high pressure water is provided to both the anode and cathode sides of the electrolyzer by a pump in the pressure vessel Oxygen produced at the high pressure on the anode side of the electrolyzer is vented directly into the pressure vessel while hydrogen produced at the high pressure on the cathode side is routed to a separator and is deadheaded. The high pressure hydrogen is periodically routed from the separator to a storage tank by a pressure regulator.

The invention provides a high-pressure hydrogen supply system for an external supplying type hydrogen filling station, which can fill hydrogen fuel for fuel cell powered vehicles. The hydrogen supply system mainly comprises a pipe bundle hydrogen conveying vehicle, a fixed high-pressure hydrogen storage tank group, a parallel multi-compressor pressurizing system, a high-pressure hydrogen filling system, and a data acquiring, processing and safety monitoring system. The high-pressure hydrogen supply system takes the pipe bundle hydrogen conveying vehicle as a part of a hydrogen storage container of the hydrogen filling station and makes the pipe bundle hydrogen conveying vehicle a first stage of the staged hydrogen storage container, adopts the pressurizing system consisting of multiple compressors which are connected in parallel, and introduces the data acquiring, processing and safety monitoring system. The high-pressure hydrogen supply system has the advantages of adjustable hydrogen storage volume, large operation flexibility, cost conservation, convenient maintenance, high service efficiency and so on.

A method and system are described for making ammonia using hydrogen from a gasification process and for integrating the steam systems of the two processes. The gasification process provides high-pressure, purified hydrogen and high-pressure, saturated steam. The high pressure hydrogen lowers the overall compression requirement for the ammonia process. In addition, the high-pressure, saturated steam can be converted into superheated steam by recovering heat from ammonia synthesis and used to power steam turbines for compression and refrigeration needs.

The invention relates to the field of renewable, clean and environment-friendly new energy, aiming at providing a hydrogen refueling station hydrogen optimizing filling method based on temperature rise and energy consumption control and a system thereof. The method comprises the steps of: establishing a database arranged inside a programmable logic controller (PLC), and using the database to record the corresponding relationship between the corresponding filling initial condition and the opening value of a needle valve; according to the filling initial condition, using the PLC to inquire the opening value of the needle valve when hydrogen storage tanks with different pressure levels are used for taking gas; and according to the data inquired by the PLC, arranging the needle valve at the corresponding demarcated position, and carrying out the filling operation. The invention can run at the lower power consumption of a cooling device, ensures the temperature of a vehicle hydrogen storage container to be strictly controlled within the required range, and remarkably shortens the filling time, thus leading the whole system to effectively, safely and reliably fill high pressure hydrogen, and having the advantages of high gas taking efficiency, low power consumption and the like.

An hydrogen tank filling apparatus includes a first hydrogen supply pipe for supplying hydrogen substantially at an atmospheric temperature from a high-pressure hydrogen storage tank to a hydrogen tank, a second hydrogen supply pipe for supplying cooled hydrogen from the high-pressure hydrogen storage tank to the hydrogen tank, and an internal tank temperature measuring unit for measuring the temperature inside the hydrogen tank. The first hydrogen supply pipe and the second hydrogen supply pipe are selectively switched by a control unit, depending on changes in the temperature inside the hydrogen tank.

At a high pressure hydrogen or compressed natural gas vehicle refuel depot, the thermal energy (heat) generated by from the high flow rate of the high pressure refueling gas is evacuated from the on board fuel tank[s] of consumer vehicles eliminating the need for refueling pre treatments such as a slow fill, secondary precooling, and pressure overfill otherwise used to achieve a full vehicle tank refill. In an example, a high pressure fuel depot refilling line is operatively interconnected to an on board vehicle tank having a gas flow circuit wherein the refuel gas itself is circulated within the on board tank to absorb the compression heat of refueling and then to an external radiator before being released into the tank.

The invention discloses a fuel cell anode water management system and a control method, and belongs to the technical field of proton exchange membrane fuel cells. Aiming at the problem of anode watermanagement in the operation process of a proton exchange membrane fuel cell, the scheme provided by the invention can realize two functions of water removal and humidification, and liquid water separated from a baffle in a gas-water separation device in the water removal process is stored and supplemented to an ejector when the fuel cell membrane is dry and needs to be humidified. Liquid water inthe electric pile tail gas is fully recycled, so that the environmental adaptability of a humidifying system to a water shortage condition and a low-temperature condition is improved. Liquid water issucked into a mixing chamber through high-pressure hydrogen and the ejector, and extra system power consumption increased by humidifying devices such as an atomizing nozzle and an ultrasonic atomizeris avoided.

The invention relates to a method for depolymerizing lignin into aromatic compounds under the conditions of no additional hydrogen. According to the method, biomass-base alcohol compound reformation hydrogen production reaction and lignin hydrodepolymerization reaction are combined; and in the reaction process, the biomass-base alcohol compounds are subjected to in-situ reformation hydrogen production, and meanwhile, the hydrogen is used for hydroepolymerizing lignin. The lignin is selectively cracked into C6-C9 aromatic compounds of phenolic group, guaiacol group, lilac group or other derivatives under the action of the catalyst. The conversion rate of the raw materials is up to higher than 50%, and the content of the guaiacol-group and lilac-group aromatic compounds in the cracked product can reach higher than 90%. The method uses the hydrogen prepared by biomass-base alcohol in-situ reformation as the hydrogen source, and avoids using high-pressure hydrogen in the preparation route; and thus, the method has the characteristics of high safety coefficient in the reaction process, high yield of the aromatic compounds, and mild reaction conditions.

The invention discloses a fuel supplying system for a liquid-propellant rocket engine test. The fuel supplying system for the liquid-propellant rocket engine test comprises a hydrogen source system, a hydrogen conveying pipeline system and a gas distribution platform system. The hydrogen source system comprises a large high-pressure gas storage tank, a high-pressure gas cylinder, a filter, a manual adjusting and pressure reducing device, a hydrogen pump and a pipeline. The hydrogen conveying system comprises three main paths and an ignition path d, wherein the three main paths are respectively the main path a, the main path b and the main path c. The gas distribution platform system comprises three main path branch paths, an ignition path branch path, a fifth branch path and a blowdown filling gas path. The three main path branch paths are respectively the main path branch path a, the main path branch path b and the main path branch path c. According to the fuel supplying system for the liquid-propellant rocket engine test, the principle that low-pressure hydrogen and high-pressure hydrogen are used in an isolated mode is utilized, the high-pressure hydrogen is directly filled into the high-pressure gas cylinder and the low-pressure hydrogen goes through a certain pressure reducing and boosting device to have high pressure and is continuously filled into the high-pressure gas cylinder. Leftover media in the hydrogen cylinder are fully utilized and the utilization rate is improved.

The invention discloses a device for measuring hydrogen embritllement sensitivity of materials in a low-temperature environment, consisting of an experiment table base 2, an experiment box 8, a stress application shaft 9, a sample clamping part, a hydrogen charging interconnecting piece and a temperature measuring and adjusting device 18, wherein the sample clamping part consists of a loading clamp A5, a loading clamp B6 and a fixed clamp 4 and is arranged in the experiment box 8; the stress application shaft 9 passes through the center of the experiment box 8 from the upper part, the lower part of the stress application shaft 9 is coaxially connected with the upper part of a sample 12 through the ample clamping part, the hydrogen charging interconnecting piece passes through the center of the experiment box through the lower part, and the upper part of the hydrogen charging interconnecting piece is coaxially connected with the lower part of the sample 12 through threads; and the temperature measuring and adjusting device 18 is arranged in the experiment box 8. The device is used for measuring the change of mechanical property of the materials in a high-pressure hydrogen charging environment; no high pressure cavity is used and only a low temperature environment is provided in the cavity, so the experiment process is extremely safe and the problem of potential safe hazard caused by the high pressure cavity used in the traditional hydrogen charging experiment can be solved.

The invention relates to a hydrogen management system of a vehicle-mounted fuel cell. The hydrogen management system comprises a hydrogen control unit (15), and a hydrogen bottle electromagnetic valve (4), a hydrogen bottle pressure sensor (2), a temperature sensor (5) and a hydrogen concentration sensor (16) which are connected with the hydrogen control unit (15) separately; the hydrogen bottle electromagnetic valve (4), the hydrogen bottle pressure sensor (2) and the temperature sensor (5) are connected with a vehicle-mounted high-pressure hydrogen bottle (1) separately; a probe of the hydrogen concentration sensor (16) is arranged in the environment above the high-pressure hydrogen bottle (1); and the hydrogen control unit (15) is in communication connection with a vehicle-mounted fuel cell controller through CAN. Compared with the prior art, the functions of hydrogen adding control, hydrogen supplying control, safety detection and the like of a vehicle-mounted hydrogen storage system can be realized, cable connection between systems is reduced, and signal missing in a signal transmission process and risk of high probability of interference are lowered.

The invention relates to an efficient hydrogen energy vehicle power system with an ambient air purifying function. The efficient hydrogen energy vehicle power system comprises a drive system, a gas turbine, a high pressure hydrogen storage tank, a hydrogen compression unit, a hydrogen gas surge tank, an inverter, an electric-power generator, an expander, a storage battery and an exhaust gas treating and discharging system. The high pressure hydrogen storage tank is connected to an inlet of the expander, one path of an outlet of the expander is connected to a hydrogen inlet through a cold capacity recovery device and the hydrogen gas surge tank, and the other path is connected to the inlet of the expander through a hydrogen compression unit and an intermediate tank. A power combiner is connected with the gas turbine and/or the electric-power generator, according to the technical scheme, the gas turbine is replaced with a hydrogen fuel engine, and the power combiner is connected with the drive system through a drive shaft. According to the efficient hydrogen energy vehicle power system with the ambient air purifying function, the gas turbine is combined with the electric-power generator, so that work efficiency of the hydrogen energy vehicle power system is improved. By recycling of exhaust gas heat, air pollution is reduced, and the natural environment can be protected easily.

The invention discloses a hydrogen container hydrogen environment fatigue test system. One end of a high pressure hydrogen container is respectively communicated with a test container and a low pressure hydrogen container through an explosion protection pressure reducing valve, a flow regulating control valve, a first normal open stop valve and a test container depressurizing valve; the low pressure hydrogen container is communicated with the other end of the high pressure hydrogen container through a booster pump; a pressure sensor and a cycle recording device are arranged between the first normal open stop valve and an atmospheric valve; the normal open stop valve, a pressure display and a standard pressure gauge are arranged between the test container and the normal open stop valve; one path of an automatic control system operation console is respectively electrically connected with the booster pump and the pressure gauge through an excessive pressure controller; the other path of the automatic control system operation console is electrically connected with the atmospheric valve and the test container depressurizing valve. The high pressure hydrogen in the high pressure container is charged into the test container through the explosion protection pressure reducing valve and the flow regulating control valve, the explosion protection pressure reducing valve is closed when a set pressure is reached, the test container depressurizing valve is opened after maintaining the pressure for a while, and the hydrogen is depressurized into the low pressure container to complete a fatigue test cycle.

A weld joint having a base material and a weld metal both of an austenitic steel, wherein the weld metal has a chemical composition, in mass %, that C: 0.04% or less, Si: 1.0% or less, Mn: 3% or less, P: 0.02% or less, S: 0.005% or less, Cr: 15 to 25%, Ni: 30% or more, Mo: 10% or less, Nb: 2.5 to 5%, Al: 3.0% or less, Ti: 0.5% or less, and the balance: Fe and inevitable impurities, the contents of Al and Ti satisfying the following: (Ti+Al)>Nb/8. The weld joint is a high strength austenitic steel weld joint which exhibits excellent toughness at a low temperature and excellent resistance to hydrogen embrittlement, which are required for a piping and a vessel for high pressure hydrogen, particularly also in a welded zone.

The invention relates to a sub-station of a hydrogenation station, which can provide services of charging and unloading hydrogen fuels for a fuel battery automobile. The sub-station of the hydrogenation station comprises a traction headstock, a semi-trailer, and an integral skidded part detachably fixed on the semi-trailer, wherein the skidded part is formed by connecting a hydrogen loading system, a high pressure hydrogen-storing system, a hydrogen pressurizing system, a hydrogen unloading system, a high pressure hydrogen charging system, a control system and an auxiliary system. By a compressor for fixing the hydrogenation station, high pressure hydrogen loading capacity of the sub-station is greatly improved, and the compressor is saved so that the sub-station has the advantages of low cost, noise removal, reduced size, simplified operation and maintenance and intensified maneuverability. The self-prepared pressurizing system of the sub-station can greatly improve yield of the hydrogen, and the unloading system can securely unload the vehicle high pressure hydrogen to the sub-station when the fuel battery automobile has a fault. The sub-station of the hydrogenation station can be independently used as an apparatus for charging the hydrogen fuels of the fuel battery automobile, and is more suitable to combine the fixed hydrogenation station to form a high pressure hydrogen charging network with flexible maneuver.

Hydrogen gas flow from high pressure storage to a lower pressure hydrogen-using device is managed using one or more axial flow pressure regulators comprising a cup-shaped housing with an inlet for high pressure hydrogen gas at one end of the flow axis and a closure with a low pressure hydrogen outlet at the other end of the flow axis. A piston head with a piston stem are aligned on the flow axis and a hydrogen flow passage is formed up the stem and through the piston head to the hydrogen flow outlet. One or more combinations of a corrugated tubular bellows (or like expansive sealing vessel) with static seals attaching one bellows end to the piston stem or head and the other bellows end to the housing or closure are used to accommodate axial movement of the piston while isolating and containing hydrogen gas flow from a high pressure chamber at a flow entrance to the piston stem to a low hydrogen pressure chamber at the piston head and closure outlet.

A portable proton exchange membrane fuel cell power supply system has a high pressure hydrogen gas supply that is provided from hydrogen storage cylinders that are enclosed in a case that has through holes for ventilation to prevent hydrogen gas concentrations from reaching explosive levels. Enclosed in a second case are a fuel cell stack, control unit, variable speed air compressor and power inverter. The cases incorporate lightweight, high-strength non-metallic materials and foam insulation to render the contents shock resistant. In operation a hydrogen gas connection line is made to extend between the hydrogen cylinders and the fuel cell that is connected through quick disconnect valves. The compressor is also connected to the fuel cell through a quick disconnect valve. Start up of the fuel cell is accomplished with a battery supplying power to the compressor while hydrogen gas is supplied at the same time.

The invention discloses a mixed filling system applied to a hydrogen filling station of liquid hydrogen. The mixed filling system comprises a liquid hydrogen filling unit and a high-pressure hydrogengas filling unit which are connected with a liquid hydrogen storage pot for the station, wherein a first liquid hydrogen conveying pipe in the liquid hydrogen filling unit can be communicated with theliquid hydrogen storage pot for the station through a liquid hydrogen pump; an output end of the first liquid hydrogen conveying pipe is used for connecting a liquid hydrogen filling gun; the high-pressure hydrogen gas filling unit comprises a second liquid hydrogen conveying pipe and a third liquid hydrogen conveying pipe which can be communicated with the liquid hydrogen storage pot for the station through the liquid hydrogen pump; the second liquid hydrogen conveying pipe is communicated with a spraying nozzle in a gas-liquid mixer; the third liquid hydrogen conveying pipe is communicatedwith a vaporizer; a gas output pipe on the vaporizer is communicated with a high-pressure hydrogen gas hydrogen storage bottle; a storage bottle output pipeline of an output end of the high-pressure hydrogen gas hydrogen storage bottle is communicated to the gas-liquid mixer; a hydrogen gas output pipe of the output end of the gas-liquid mixer is used for being connected with a high-pressure hydrogen gas filling gun. The mixed filling system has the advantages that a hydrogen filling form is effectively increased and the liquid hydrogen capability is greatly improved.

The invention relates to a combination valve for a high-pressure hydrogen storage cylinder, which comprises a charging check valve, a manual stop valve, an electromagnetic valve, a pressure reducing adjusting valve and a safe pressure releasing device; wherein a gas flue of a charging inlet of the hydrogen storage cylinder is provided with the check valve and the manual stop valve, a gas supply flue is educed between the two valves and supplies gas outwards through the electromagnetic valve and the pressure reducing adjusting valve; a pressure releasing gas flue is educed between the manual stop valve and the gas flue connected into the combination and releases pressure outwards through the safe pressure releasing device. As a cylinder valve is provided with the pressure reducing adjusting, considering the integration of the cylinder valve and the mensurability and output controllability of the gas, the invention can implement the low-pressure output; therefore, a gas supply output system has the very high safe reliability and simultaneously can be used as a main valve of a hydrogen storage cylinder group; other gas cylinders of the hydrogen storage cylinder group can supply gas outwards after pressure reduction through the main valve.