281 results about "Gaseous hydrogen" patented technology

The invention discloses a hydrogen supply and energy storage device which comprises a hydrogen storage tank body, a gaseous hydrogen storage tank is installed in the hydrogen storage tank body, a liquid hydrogen storage tank is installed on the hydrogen storage tank body, a supporting plate is fixedly connected to the hydrogen storage tank body, and a cooling liquid storage box is installed at the top end of the supporting plate. A transverse plate is fixedly connected to the side wall of the cooling liquid storage box, metal cooling fins are arranged on the side wall of the transverse plate, and the cooling device further comprises a cooling circulation assembly and an air blowing cleaning assembly. A motor drives a first sector gear to rotate, the first sector gear is alternately engaged with a transmission gear and a driven gear, so that a rotating shaft drives metal heat dissipation fins to rotate for heat dissipation, and meanwhile, the driven gear drives cooling liquid to circularly flow in a sealing pipe, a cooling pipe and a liquid inlet pipe through a connecting rod and a piston rod; and cold airflow generated by the fan is used for dissipating heat of the hydrogen conveying pipe, so that the heat dissipation effect is improved.

The invention relates to a hydrogen supply system and a new energy automobile. The system comprises a liquid hydrogen module and a gas hydrogen module, wherein the liquid hydrogen module and the gas hydrogen module are used for respectively providing hydrogen and high-pressure hydrogen subjected to first pressurization treatment for a pressurization module; the first side of the recovery module is connected with the liquid hydrogen module, and the recovery module is used for receiving recovered gas hydrogen discharged by the liquid hydrogen module and obtaining pressurized recovered gas hydrogen; the second side of the recovery module is connected with the gas hydrogen module and is used for transmitting the pressurized recovered gas hydrogen to the gas hydrogen module; the pressurizing module is used for performing second pressurizing treatment and third pressurizing treatment on the hydrogen subjected to the first pressurizing treatment and the high-pressure hydrogen to obtain pressurized target hydrogen; the buffer module is used for supplying the supercharged target hydrogen to the engine module. By adopting the hydrogen supply system, under the condition of low liquid hydrogen storage pressure, the liquid hydrogen supply pressure can be effectively maintained, stable operation of a fuel cell is guaranteed, meanwhile, evaporated hydrogen of the liquid hydrogen system is recycled, the energy utilization rate is increased, and then the power and cruising ability of a vehicle are guaranteed.

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.

The invention relates to a system for storing liquid hydrogen and for distributing gaseous hydrogen, comprising a source of liquid hydrogen (20), at least two gaseous hydrogen tanks (31-35) to be filled and a transfer device comprising: a transfer unit (25) configured to transfer liquid hydrogen from the hydrogen source (20) to any of the tanks, a vapour compressor (10) having a first upstream end and a second downstream end fluidly connected to each of the tanks, a set of valves (51-55), a control device configured to issue a command to transfer the liquid hydrogen and to open and / or close one or more valves (51-55), the compressor (10) being arranged so as to transfer vapours created during filling from any tank to each of the other tanks in succession, by compressing the vapors to a pressure greater than the pressure in the tank during filling.

The invention discloses a solid-gas coupling hydrogen storage system and a flow and pressure coordinated regulation and control method thereof. The system comprises a gaseous hydrogen storage tank, a solid hydrogen storage tank, a hydrogen coupling regulation and control device, a hydrogen buffer tank, a solid hydrogen storage thermal management system, a high-pressure proportional valve, a low-pressure proportional valve, a three-way valve and a hydrogen storage valve. The gaseous hydrogen storage tank is connected with the hydrogen coupling regulation and control device through a pipeline, and high-pressure hydrogen is conveyed to the high-pressure inlet end of the hydrogen coupling regulation and control device. The low-pressure inlet end of the hydrogen coupling regulation and control device is connected with the solid hydrogen storage tank through a pipeline, and the outlet end of the hydrogen coupling regulation and control device is connected with the hydrogen buffer tank through a pipeline; and the pipelines of the gaseous hydrogen storage tank and the solid hydrogen storage tank are simultaneously connected with the three-way valve. According to the system, efficient and safe hydrogen storage and supply are achieved through the synergistic effect of all the components, and reliable technical innovation and support are provided for hydrogen energy application.

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.

The invention discloses a low-temperature quick-start solid hydrogen storage device which comprises an insulating heat preservation shell and further comprises a solid hydrogen storage tank, a gaseous hydrogen storage tank, an air-cooled hydrogen fuel cell, a hydrogen supply mechanism and a heating mechanism, the solid hydrogen storage tank and the gaseous hydrogen storage tank are fixedly arranged in the insulating heat preservation shell, the solid hydrogen storage tank is filled with hydrogen storage alloy powder, and the air-cooled hydrogen fuel cell is arranged in the insulating heat preservation shell. A gas communicating pipe is fixedly arranged between the gaseous hydrogen storage tank and the solid hydrogen storage tank, a one-way valve is arranged in the gas communicating pipe, the air-cooled hydrogen fuel cell is arranged on one side of the insulation heat preservation shell, and the low-temperature quick-start solid hydrogen storage device is used for solving the problem that in the prior art, a solid hydrogen storage bottle is poor in hydrogen desorption performance in a low-temperature environment.

A system and method for operation for cryo-compressed hydrogen storage can include: an inner pressure vessel that includes an inner liner with a defined inner volume configured for para to ortho conversion of gaseous hydrogen before venting; an insulation layer, situated outside the inner pressure vessel; an outer wall; and a support structure situated between the inner pressure vessel and the outer wall.

The present invention relates to an alkaline electrolysis device comprising: - at least one electrolysis cell comprising a reactor chamber which comprises a hydrogen-side reactor chamber region containing the aqueous electrolyte for decomposing the aqueous electrolyte into gaseous hydrogen and an oxygen-side reactor chamber region containing the aqueous electrolyte for decomposing the aqueous electrolyte into gaseous oxygen; - a hydrogen separator connected to the hydrogen-side reactor chamber region for separating the gaseous hydrogen from the aqueous electrolyte introduced into the hydrogen separator; and - an oxygen separator connected to the oxygen-side reactor chamber region for separating the gaseous oxygen from the aqueous electrolyte introduced into the oxygen separator; wherein the hydrogen separator has a first hydrogen separator outlet for removing the aqueous electrolyte having a first hydrogen concentration and a second hydrogen separator outlet for removing the aqueous electrolyte having a second hydrogen concentration that is less than the first hydrogen concentration; and where the first hydrogen separator outlet and the second hydrogen separator outlet are connectable or connected to the reactor chamber.

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.

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 method (100) for producing a synthesis product (6) is proposed, in which gaseous hydrogen (3) is provided by electrolysis (10) of water (1) and is subjected to a reaction (30) with one or more gaseous reactants (4) to form the synthesis product (6), wherein during a first process mode the hydrogen (3) and the one or more reactants (4) are mixed to obtain a reaction mixture (5), and the reaction mixture (5) or a portion thereof is stored under pressure in a storage unit (20), and wherein during a second process mode the reaction mixture (5) stored under pressure in the first process mode or a portion thereof is removed from the storage unit (20) and fed to the reaction (30) to form the synthesis product (6). A corresponding system is also proposed.

The utility model discloses a liquid hydrogen system and a vehicle, the liquid hydrogen system comprises: a liquid hydrogen storage member for storing liquid hydrogen; one end of the evaporation pipeline is communicated with the liquid hydrogen storage part; the other end of the evaporation pipeline is communicated with the buffer part so as to supply gaseous hydrogen to the buffer part, and the buffer part is used for being communicated with a fuel cell so as to supply gaseous hydrogen to the fuel cell; and the pressurizing pipeline is provided with a pressurizing inlet and a pressurizing outlet, the pressurizing inlet is communicated with the buffer piece, and the pressurizing outlet is communicated with the liquid hydrogen storage piece so as to guide the gaseous hydrogen into the liquid hydrogen storage piece. The pressurizing pipeline is arranged between the liquid hydrogen storage piece and the buffering piece, the gaseous hydrogen in the buffering piece is guided into the liquid hydrogen storage piece through the pressurizing pipeline, the pressure in the liquid hydrogen storage piece is increased through the gaseous hydrogen, the whole structure is simple, implementation is easy, and the problem that the pressure in the liquid hydrogen storage piece is insufficient is solved.

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 multi-rotor hydrogen energy unmanned aerial vehicle which comprises an unmanned aerial vehicle body, a gaseous hydrogen storage bottle, a plurality of arm spans and a plurality of propeller pile fusion type structures. The gaseous hydrogen storage bottle is arranged on the unmanned aerial vehicle body, and the plurality of arm spans are uniformly arranged on the side surface of the unmanned aerial vehicle body; the propeller pile fusion type structure is arranged at the end, away from the unmanned aerial vehicle body, of the arm extension, and the propeller pile fusion type structure and the arm extension are arranged in a matched mode. According to the structure, the air-cooled reactor is arranged below the blades of the unmanned aerial vehicle to form a propeller-reactor fused structure, high-speed airflow generated by the propeller blade thruster is directly used for air inlet reaction and cooling of the air-cooled reactor, and the heat dissipation performance of a battery loaded on the unmanned aerial vehicle can be greatly improved on the basis that the structure of the unmanned aerial vehicle is not changed; and the requirements of actual use are well met.

Disclosed is a liquid hydrogen-based power pack integrated thermal management system comprising: a fuel cell which is supplied with gaseous hydrogen and oxygen and causes a reaction between the gaseous hydrogen and oxygen to generate electric energy; a hydrogen fuel tank which stores and supplies liquid hydrogen; a heat exchanger which heats and vaporizes the liquid hydrogen supplied from the hydrogen fuel tank via a first hydrogen line and supplies the vaporized hydrogen to the fuel cell via a second hydrogen line, and which supplies cooling water for keeping the fuel cell within a normal operating range temperature by reducing, via a first refrigerant line, the heat load on the fuel cell generated during the operation of the fuel cell, wherein a shell storing the cooling water is connected to the fuel cell via a second refrigerant line, and a spiral heat transfer tube connected at both ends to the first and second hydrogen lines is embedded in the shell; and a control module for overall control of the operation, pressure, and temperature of the system.

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.

The invention relates to a tube trailer comprising: a first hydrogen gas source comprising gaseous hydrogen, a second hydrogen gas source comprising gaseous hydrogen, a controller, an outlet connection, and a fuel cell. Wherein said first and said second hydrogen gas sources, are fluidly connectable to said outlet connection and to said fuel cell via a conduit system, thereby facilitating refueling a receiving vessel, when connected to said outlet connection, and energy production by said fuel cell, and wherein said fuel cell is electrically connectable to an electric load thereby facilitating supply of electric power to said electric load, when electrically connected to said fuel cell. Wherein said controller is configured to establish a flow of said gaseous hydrogen in said conduit system from said first hydrogen gas sources to said fuel cell when the pressure in said first hydrogen gas source is below a dispensing threshold pressure.

Systems and methods for treating an object, in particular, for disinfecting and / or drying objects and / or surfaces are provided. One or more of an air delivery system, an electromagnetic emitter (e.g., a Far ultraviolet (UV) light source), and / or an air treatment device (e.g., a gaseous hydrogen-peroxide generator) may be used to condition ambient air to treat a surface or container for use (e.g., prior to filling the container, applying a surfactant, etc.). An ionizer may be employed with one or more of the emitter or air treatment device to additionally remove static from air within or provided to a treatment area.

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 invention provides a hydrogen fluoride production system and method, and belongs to the technical field of hydrogen fluoride production, the hydrogen fluoride production system comprises a reaction unit, a purification unit and a rectification unit which are arranged in sequence, and the rectification unit comprises a rectification tower, a first cooler, a second cooler and a cold crude acid tank; the first cooler is provided with a first cooling medium channel and a first working medium channel, and an inlet of the first working medium channel communicates with an outlet of the purification unit; the second cooler is provided with a second cooling medium channel and a second working medium channel, an inlet of the second working medium channel is communicated with an outlet of the first working medium channel, an outlet of the first working medium channel is communicated with an inlet of the second working medium channel, and an outlet of the first cooling medium channel is communicated with the rectifying tower; according to the invention, the liquid hydrogen fluoride is stored in the cold crude acid tank, so that the liquid hydrogen fluoride cools the gaseous hydrogen fluoride in the first cooler, a coolant does not need to be purchased or supplemented, and the production cost is reduced.

The invention discloses a high-pressure gaseous hydrogen peroxide supply apparatus, and a high-pressure substrate processing apparatus and method using the same. The high-pressure substrate processing method includes: a step of reacting hydrogen gas and oxygen gas; a step of obtaining a generated hydrogen oxide having a first pressure; a step of converting the generated hydrogen oxide into a treated gaseous hydrogen oxide having a second pressure higher than the first pressure and atmospheric pressure; and a step of causing the processing gaseous hydrogen oxide to act on the substrate to be processed in the processing chamber.