159 results about "Gaseous hydrogen" patented technology

A system and method for hydrogen storage, and delivery. The system includes a hydrogen storage tank, a first pump disposed within the hydrogen storage tank, and a second pump disposed outside of the hydrogen storage tank. The hydrogen storage tank is to store gaseous hydrogen and liquid hydrogen. The first pump is to pump out liquid hydrogen out of the storage tank, producing a low pressure flow. The second pump is to receive this low pressure flow and produces a high pressure flow of liquid hydrogen. The system can also include a thermal device disposed within the hydrogen storage tank to heat gaseous hydrogen when a pressure within the hydrogen storage tank drops below a predetermined minimum pressure. The system can also include a heat exchanger to receive the high pressure flow of liquid hydrogen from the second pump.

According to the gas-liquid mixing hydrogen refueling station system with the cooling capacity recovery and gradient utilization functions, flash steam of the low-temperature liquid hydrogen storage tank is collected and stored in the low-temperature hydrogen storage tank, the cooling capacity of the flash steam is fully utilized, cooling capacity is provided for the heat exchanger, high-pressure hydrogen is cooled, the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized, and the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized. Energy gradient utilization of cooling capacity is achieved, and loss of extra energy in the hydrogen refueling station is reduced; the flash steam obtained after heat exchange is further used for hydrogen compression, and reutilization of the low-temperature liquid hydrogen flash steam is achieved; the flash steam after heat exchange is pressurized and then cooled by using the cooling capacity of the high-pressure liquid hydrogen, and meanwhile, the heating gasification of the high-pressure liquid hydrogen is realized, namely the gasification of the pressurized liquid hydrogen in the liquid hydrogen refueling station and the cooling of a gas hydrogen pressurization process in the liquid hydrogen refueling station are coupled for heat exchange, so that the utilization efficiency of the heat and the cooling capacity is greatly improved; an external vaporizer is not needed for high-pressure liquid hydrogen gasification, an external cooler is not needed in the gas-hydrogen pressurization process, and energy consumption is greatly reduced.

A H2 defueling system for automating defueling of a hydrogen tank is disclosed. The H2 defueling system comprises: a hydrogen storage tank containing hydrogen; a plurality of electronic valves configured for regulating hydrogen discharge of hydrogen from the hydrogen tank; at least one pressure sensor and at least one temperature sensor; a hydraulic circuit interconnecting the hydrogen tank, the plurality of electronic valves, the at least one pressure sensor and the at least one temperature sensor; and a control unit configured to: receive input from the at least one pressure sensor and the at least one temperature sensor; automatically adjust the flow rate of gaseous hydrogen from the storage tanks based on the input from the sensors to maintain the gaseous hydrogen within pressure limits; modulate operations of the plurality of electronic valves to control hydrogen discharge to control the flow of hydrogen from the hydrogen tank.

A propulsion system comprises a propulsive hydrogen-burning gas turbine engine, a first tank storing liquid hydrogen with an ullage and a first fuel line including a fuel pump and a vaporiser, the first fuel line providing gaseous hydrogen to the engine during operation of the system. A second tank storing gaseous hydrogen is coupled by a second fuel line to the first fuel line at a position thereon between the vaporiser and the engine, providing for engine start-up (when the vaporiser is inoperative) and power-boosting during operation of the system. A duct connects gaseous hydrogen within the second tank to the ullage in the first tank in order maintain pressure in the first tank as liquid hydrogen within it is depleted, preventing cavitation of liquid hydrogen within the fuel pump.

The invention discloses a method, a system, a medium and equipment for predicting hydrogen in oxygen of an alkaline electrolysis system, and the method comprises the steps: obtaining a total calculation formula for predicting hydrogen in oxygen of the alkaline electrolysis system based on the contribution of dissolved hydrogen which is not separated by a gas-liquid separator, gaseous hydrogen which is not separated by the gas-liquid separator, electrolytic bath saturation diffusion and electrolytic bath supersaturation diffusion mechanisms to hydrogen in oxygen of the system; according to experimental data of the alkaline electrolysis system under different alkaline liquid circulation flow working conditions, calibrating a to-be-fitted coefficient; according to experimental data of the alkaline electrolysis system under different system pressure working conditions, calibrating a to-be-fitted coefficient; according to experimental data of the alkaline electrolysis system under different working current working conditions, calibrating a to-be-fitted coefficient; according to experimental data of the alkaline electrolysis system under different temperature working conditions, a to-be-fitted coefficient sum is calibrated; and inputting temperature, pressure, alkali liquor circulation flow and current experiment data of the alkaline electrolysis system, and calculating hydrogen in oxygen of the alkaline electrolysis system so as to output system HTO under different operation conditions in real time.

The application relates to the technical field of hydrogen energy transportation and material performance testing, and relates to a test structure for hydrogen permeation testing under a high-pressure gaseous hydrogen environment, a mounting method and application thereof. The test structure comprises a sample body and an insulating sealing assembly, and the sample body is in a double-stage disc structure. The uppermost edge of the first sealing insulating assembly is flush with the upper end surface of the cylindrical platform, and the sample body is matched with the inner side of the first sealing insulating assembly for installation. The second sealing insulating assembly is in an open-upward shape, and the first sealing insulating assembly is matched with the second sealing insulating assembly for installation. The test surface of the sample body of the test structure is kept consistent with the flow field of the gas main stream, and when the test structure is used for testing, the permeation behavior of the hydrogen flow to the material surface can be truly reflected. All clamping and conducting structures are arranged on the outer part of the pipe wall of the test pipeline or the left part of the sample body, so that flow field disturbance is avoided in the main path of the gas flow.

The invention discloses a hydrogen brittleness performance evaluation method for a hydrogen transport pipeline, which comprises the following steps: obtaining the average hydrogen concentration in a sample through a high-pressure hydrogen permeation test of a wafer sample, and obtaining the hydrogen concentration and hydrogen diffusion coefficient of the surface of the sample under a specific electrochemical hydrogen charging condition through an electrochemical hydrogen charging test of the wafer sample; a finite element analysis model of a target sample is established to simulate the change relation of the total amount of hydrogen atoms in the target sample along with time under the electrochemical hydrogen charging condition, and the electrochemical hydrogen charging time equivalent to the high-pressure gaseous hydrogen charging is obtained by comparing the high-pressure gaseous hydrogen charging with the electrochemical hydrogen charging. The target sample is charged with hydrogen through an electrochemical hydrogen charging method, and finally the hydrogen embrittlement performance of the target sample is obtained through a hydrogen embrittlement performance test. According to the method, simple finite element simulation and electrochemical hydrogen charging are combined, high-pressure gaseous hydrogen charging which is complex, low in efficiency and high in danger is replaced, and the detection time of the hydrogen embrittlement performance test of the hydrogen charging pipe is shortened.

A hydrogen distribution system for supplying hydrogen to a hydrogen consumer comprising: a tank storing a liquid hydrogen fuel; a conditioning system configured to provide a gaseous hydrogen stream downstream from the tank towards the hydrogen consumer; a compressor downstream of the conditioning system and configured to receive the gaseous hydrogen stream and provide a high-pressure gaseous hydrogen stream; a heater downstream of the compressor and configured to receive the high-pressure gaseous hydrogen stream and provide a high-temperature, high-pressure gaseous hydrogen stream; and, a valve downstream of the heater and configured to adjust a flow of the high-temperature, high-pressure gaseous hydrogen stream; wherein the hydrogen consumer is downstream of the valve and configured to receive the high-temperature, high-pressure gaseous hydrogen stream and provide energy by consuming hydrogen from the high-temperature, high-pressure gaseous hydrogen stream. Also, an aircraft with such a system.

Method and system for electrochemically compressing hydrogen. In one embodiment, the system includes a membrane electrode assembly (MEA) that includes a polymer electrolyte membrane (PEM), an anode, and a cathode. First and second gas diffusion media are positioned adjacent the cathode and anode, respectively. A humidifying membrane is positioned next to the second gas diffusion medium on a side opposite the anode. A water supply is connected to the humidifying membrane, and a hydrogen gas supply is connected to the second gas diffusion medium. A hydrogen gas collector including a back pressure regulator is connected to the first gas diffusion medium. Separators, positioned on opposite sides of the MEA, are connected to a power source. In use, hydrogen is electrochemically pumped across the MEA and collected in the hydrogen gas collector. The PEM is kept properly humidified by the humidifying membrane, which releases water into the second gas diffusion medium.

The application discloses an experimental device and experimental method for submarine pipeline stress corrosion in a gaseous hydrogen environment, which comprises a high-pressure kettle body arranged on a support, a flange kettle cover arranged on the high-pressure kettle body, NaCl solution arranged in the high-pressure kettle body, a rod-shaped sample arranged in the NaCl solution, a tension sensor arranged on a rack, an upper stretching rod connected with the tension sensor, a servo motor arranged on the rack, an electric cylinder connected with the servo motor, and a lower stretching rod connected with a piston rod of the electric cylinder. The application has the characteristics that hydrogen-induced material damage and seawater corrosion damage are connected together, and reliable data basis is provided for the selection of materials for manufacturing submarine hydrogen pipelines.

This invention relates to the field of chemical equipment technology, and discloses a lithium sulfide preparation device and method, comprising: an insulated shell; a reactor rotatably disposed inside the insulated shell, with a heating chamber formed between the reactor and the insulated shell; a rotating shaft fixed to one end of the reactor, passing through one end of the insulated shell and rotatably engaging with a support assembly; a rotating assembly connected to the rotating shaft to drive its rotation; and a heat source inlet pipe fixed to one end face of the insulated shell to communicate with the interior of the heating chamber. This invention utilizes a dynamic reactor, causing the solid material to continuously tumble and shift during the reaction process, greatly increasing the contact area between the solid phase and the gaseous hydrogen sulfide, enhancing mass transfer efficiency, significantly improving product purity and reaction efficiency, shortening the production cycle, reducing equipment investment and energy consumption, and facilitating large-scale industrial production of high-purity lithium sulfide.

A heating device comprises a thermally-conductive outer tube, and a combustor arranged to combust air and gaseous hydrogen input to the device and introduce resulting combustion products into a first end of the outer tube. The device includes an igniter arranged to ignite the air and gaseous hydrogen. Combustion products produced by the combustor flow from the combustor to an output of the device along a flow path such that they are in contact with the internal surface of the outer tube over at least a portion of the flow path. Apparatus for heating a flow of hydrogen comprises a conduit for conducting the flow of hydrogen from a principal input port to a principal output port, the apparatus further comprising the heating device located at least partially within the conduit between the principal input port and the principal output port.

The present invention relates to a system for mixing hydrogen into fuels, characterized in that it comprises a gas-in-liquid mixing valve which is supplied with gaseous hydrogen via a line originating from a hydrogen storage tank with a compressor controlled by an operating panel, wherein the outlet of the mixing valve is connected to the fuel line which supplies the boiler, engine, burner or the like.

The invention discloses a method for detecting various arsenic forms in an environment through inductively coupled plasma mass spectrometry. The method comprises the following steps: collecting air in the environment, continuously pressurizing the air, and storing the air in a collecting gas tank as a gas sample for later use; introducing the collected gas sample into a reaction kettle filled with a hydrochloric acid solution, mixing, conveying to a first spiral homogeneous conveying device through a first conveying pump, and then conveying to a cyclone spraying chamber; conveying the reaction kettle filled with the sodium borohydride solution to a second spiral homogeneous conveying device through a second conveying pump, and then conveying the sodium borohydride solution to a cyclone spraying chamber; argon is introduced into the cyclone spray chamber, and the cyclone spray chamber is connected with an inductively coupled plasma mass spectrometer and connected with a third delivery pump to discharge wastewater to a wastewater tank; gaseous hydride generated by the cyclone spray chamber and argon are conveyed to an inductively coupled plasma mass spectrometer for quantitative analysis. The technical effect of the invention is that the arsenic content and existence form in the environment can be better and more accurately detected.

The embodiment of the invention relates to the technical field of refrigeration, in particular to a low-temperature propellant storage system and method. The system is characterized in that a compressor compresses helium, a first part of compressed helium flows into a circulating refrigeration assembly, and a second part of compressed helium flows into a heating assembly; the circulating refrigeration assembly is used for cooling the first part of helium, liquid hydrogen stored in the liquid hydrogen storage tank and liquid oxygen stored in the liquid oxygen storage tank are cooled through the cooled first part of helium, and the cooled first part of helium flows back to the compressor; and the heating assembly is used for heating liquid oxygen flowing out of the liquid oxygen storage tank and liquid hydrogen flowing out of the liquid hydrogen storage tank through the second part of helium to obtain gaseous oxygen and gaseous hydrogen, the gaseous oxygen and the gaseous hydrogen are conveyed to the engine, and the second part of helium flows back to the compressor after heating treatment. According to the technical scheme, high-quality cooling capacity in the storage box can be effectively utilized, and the circulating refrigeration efficiency is improved.

A system (1) for transporting a gaseous fluid, like dihydrogen, comprising a first pipe for transporting said fluid, called first pipe (2), a second pipe for transporting said fluid, called second pipe (3), and a connector (4) arranged to connect an end, called first connecting end (6), of the first pipe (2) to an end, called second connecting end (7), of the second pipe (3), a zone (Z) comprising the first connecting end (6) of the first pipe (2), the second connecting end (7) of the second pipe (3) and the connector (4) being called connecting zone (Z), the system (1) comprising a protective jacket (5) around the connecting zone (Z) against said first and second connecting ends (6, 7) and said connector (4).

The invention relates to a gaseous hydrogen isotope separation device and system and a gaseous hydrogen isotope separation method, and belongs to the technical field of hydrogen isotope separation. The gaseous hydrogen isotope separation device comprises an anode gas diffusion layer, an anode catalyst layer, a proton exchange membrane, a cathode catalyst layer and a cathode gas diffusion layer which are sequentially stacked; the anode gas diffusion layer and the anode catalyst layer are positioned in an anode region of the gaseous hydrogen isotope separation device, and the cathode catalyst layer and the cathode gas diffusion layer are positioned in a cathode region of the gaseous hydrogen isotope separation device; the gas inlet and the first gas outlet are formed in the anode region; the second gas outlet is formed in the cathode region; the gas inlet is used for being communicated with hydrogen isotope mixed gas; the anode region is connected with the anode of a power supply, and the cathode region is connected with the cathode of the power supply. According to the device, the hydrogen isotope mixed gas can be rapidly separated, the separation factor of the gaseous hydrogen isotope is high, and the separation effect is good.

Methods and systems providing a process for cooling and liquefying a purified gaseous hydrogen feed stream to a liquid hydrogen stream that may be stored in a liquid hydrogen storage tank, as well as a system wherein ortho-hydrogen (o-H2) contained in the purified gaseous hydrogen feed stream may be converted to para-hydrogen (p-H2) through serial low-temperature catalytic converters along with cooling process from normal ambient temperature (300K) to the liquefied temperature (about 20K) of the hydrogen.

A H2 defueling system for automating defueling of a hydrogen tank is disclosed. The H2 defueling system comprises: a hydrogen storage tank containing hydrogen; a plurality of electronic valves configured for regulating hydrogen discharge of hydrogen from the hydrogen tank; at least one pressure sensor and at least one temperature sensor; a hydraulic circuit interconnecting the hydrogen tank, the plurality of electronic valves, the at least one pressure sensor and the at least one temperature sensor; and a control unit configured to: receive input from the at least one pressure sensor and the at least one temperature sensor; automatically adjust the flow rate of gaseous hydrogen from the storage tanks based on the input from the sensors to maintain the gaseous hydrogen within pressure limits; modulate operations of the plurality of electronic valves to control hydrogen discharge to control the flow of hydrogen from the hydrogen tank.

A fuel system for a hydrogen fuelled gas turbine engine includes a main hydrogen fuel storage unit, a hydrogen fuel pump configured to be supplied with hydrogen from the hydrogen storage unit, a hydrogen fuel preheater configured to be supplied with high pressure hydrogen from the hydrogen fuel pump, and configured to supply heated gaseous hydrogen to a combustor of the gas turbine engine, and a hydrogen priming tank configured to store compressed gaseous hydrogen and to deliver gaseous hydrogen to at least the hydrogen fuel pump and preheater. The fuel system comprises a high-pressure gaseous hydrogen fuel offtake downstream in hydrogen fuel flow of the fuel pump in fluid communication with the hydrogen priming tank, and configured to fill the hydrogen priming tank with high pressure gaseous hydrogen.

This invention discloses a high-pressure gaseous hydrogen filling system based on liquid hydrogen pressurization, including a liquid hydrogen storage tank connected to the inlet of a liquid hydrogen vaporizer via a liquid hydrogen booster pump; a first outlet of the liquid hydrogen vaporizer connected to the liquid hydrogen storage tank via a gaseous hydrogen outlet bypass, the gaseous hydrogen outlet bypass being equipped with a gaseous hydrogen pressure reducing valve; and a second outlet of the liquid hydrogen vaporizer connected to a gaseous hydrogen container. The invention also discloses a high-pressure gaseous hydrogen filling method based on liquid hydrogen pressurization. By connecting a gaseous hydrogen outlet bypass from the liquid hydrogen vaporizer to the liquid hydrogen storage tank, this invention increases the pressure of the liquid hydrogen stored in the storage tank, thereby increasing the inlet pressure of the liquid hydrogen booster pump, thus increasing the booster pump's pressurization efficiency and improving the efficiency of high-pressure gaseous hydrogen filling.

A hydrogen tank, preferably a tank for storing liquid hydrogen at low pressure in cryogenic condition, includes at least one gaseous hydrogen capture system. The system is provided with absorbent fillers configured to capture the gaseous hydrogen, the absorbent fillers being linked to at least a part of a wall of the tank, and / or to a skin arranged on an outer face of the tank, and / or to an outer jacket intended to implement an auxiliary function. The system has a reduced weight and is able to retain and store gaseous hydrogen which could escape from the tank so as to prevent it from being given off into the environment of the tank. The captured gaseous hydrogen is able to be restored later by the system.

Oxygen generation systems for use in low-gravity environments include a cell stack having an anode and a cathode. An anode-side phase separator and a cathode-side phase separator are each fluidly coupled to outlets of the cell stack. The anode-side phase separator separates a mixture into liquid water and gaseous oxygen and the cathode-side phase separates a mixture int liquid water and gaseous hydrogen. A ducting system is configured to house the cell stack and the cathode-side phase separator, a hydrogen sensor is arranged at an outlet of the ducting system, and a controller is configured to stop oxygen generation at the cell stack when a concentration of hydrogen is detected at or above a threshold level at the hydrogen sensor at the outlet of the ducting system.

The present disclosure relates to improvements in hydrogen flame detection. A device (120) including a resin-encapsulated carbon layer (146) is disposed proximate an outlet (134) of the hydrogen vent (116). The vent (116) transports gaseous hydrogen from a hydrogen storage device (110) on the aircraft (100) to a location external to the aircraft (100). When the hydrogen storage device (100) is pressure released, hydrogen travels through the vent (116) and exits from the outlet (134). In the event of hydrogen ignition, the heat of the hydrogen flame melts the resin and releases carbon. The carbon burns in a hydrogen flame, thereby producing a visible flame. The device (120) can be easily removed and replaced.

The utility model provides welding equipment for processing a large-volume high-pressure gaseous hydrogen storage spherical tank. The welding equipment comprises a machine body, an adjusting mechanism, a welding mechanism and an auxiliary mechanism, the adjusting mechanism comprises a pair of mounting frames, the mounting frames are arranged on the two sides of the machine body, and the outer sides of the mounting frames are each rotationally connected with a pair of magnetic attraction wheels; the auxiliary mechanism comprises a moving frame, the bottom end of the moving frame is connected with one side of the upper end face of the machine body, an extension frame is fixedly installed on one side of the moving frame, a moving block is slidably installed on the portion, located in the extension frame, of one side of the moving frame, a sliding rail is fixedly installed on one side of the moving block, and a clamping hoop is slidably installed on one side of the sliding rail. The welding mechanism comprises a laser welding head, and the laser welding head is arranged in the clamping hoop. By adjusting the angle of the mounting frame, the magnetic suction wheel can be more attached to the surface of the spherical tank, and the stability of the machine body is improved; and the position of the welding mechanism can be adjusted through the auxiliary mechanism, manual welding operation is not needed in the whole welding process, convenience and rapidness are achieved, and safety is high.

The application belongs to the technical field of low-temperature frozen liquid storage, and particularly relates to a liquid hydrogen storage system capable of realizing safe filling and a hydrogen filling method. The liquid hydrogen storage system capable of realizing safe filling comprises an inner tank and an outer tank, the inner tank is arranged in the outer tank, and further comprises a vent pipe, an upper liquid inlet pipe, a lower liquid inlet pipe, a buffer tank, a compressor, a temperature monitoring element and a liquid level pressure monitoring element. The inlet end of the vent pipe is connected to the upper portion of the inner tank, the inlet end of the vent pipe is in communication with the inner tank, and the outlet end of the vent pipe is in communication with the inner tank. The buffer tank and the compressor are connected to the vent pipe, the outlet of the buffer tank is connected to the inlet of the compressor. The upper liquid inlet pipe is connected to the upper portion of the inner tank and is in communication with the inner tank. The lower liquid inlet pipe is connected to the lower portion of the inner tank and is in communication with the inner tank. The temperature monitoring element and the liquid level pressure monitoring element are arranged on the outer wall of the inner tank. The application can avoid the flow directions of gaseous hydrogen and liquid hydrogen being opposite, is more conducive to discharging gaseous hydrogen, and improves the hydrogen filling efficiency.

A method for reducing tantalum oxide by an alkaline earth metal to produce tantalum powder for a capacitor, prepared tantalum powder, an anode block made of the tantalum powder, and a use of the tantalum powder in the manufacturing of a capacitor. The present invention specifically relates to a method for reducing tantalum oxide by an alkaline earth metal such as magnesium, preferably magnesium particles, to produce tantalum powder. The method comprises a reduction process and a heat maintaining process carried out in a hydrogen-containing atmosphere. Preferably, the hydrogen-containing atmosphere is pure hydrogen or a mixed gas of hydrogen and an inert gas; and / or the hydrogen-containing atmosphere is obtained by introducing a gaseous hydrogen-containing gas, or by adding a hydrogen-containing substance and causing same to release hydrogen.

The invention relates to a method for producing hydrogen. The method includes providing water and a gaseous substance, the gaseous substance containing hydrogen atoms and carbon atoms, producing a mixture comprising water and gas bubbles comprising the gaseous substance, reducing the diameter of the gas bubbles comprising the gaseous substance, and producing gaseous hydrogen by decomposing the gaseous substance in the gas bubbles of reduced diameter. The invention also relates to a device for producing hydrogen.

A system (100) for vaporizing hydrogen to supply hydrogen in gaseous form to a plurality of hydrogen fuel cells comprises: an evaporator; a cooler (108) configured to cool a cooling fluid in a cooling system for the plurality of hydrogen fuel cells; a spray supply system (114) comprising: a tank; a pump configured to pump water from the tank; a nozzle system; and a condensate tray (116) configured to collect condensate and return the condensate to the tank. The system (100) is configured to activate the pump to pump the condensate collected in the tank to cool the cooler (108) based on the temperature of the cooling fluid.

The purpose of the present invention is to provide a method for producing lithium sulfide in which the content of hydrogen sulfide is reduced.　The present invention is a method for producing lithium sulfide, the method comprising: reacting gaseous hydrogen sulfide with a powdered lithium source in a reactor to obtain lithium sulfide; substituting the interior of the reactor with an inert gas at a temperature of 180°C or higher after the reaction; and again substituting the interior of the reactor with an inert gas at a temperature of 60°C or lower after the inert gas substitution.