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445
results.
Updated on
17/08/2025 [07:11:00]
Results 400 to 425 of 445
Absstract of: US2025198028A1
A method operating an electrolyzer system includes producing hydrogen by electrolysis of steam in at least one electrolyzer cell stack of the electrolyzer system using power received from an intermittent power source, detecting a reduction in a level of power received from the intermittent power source below a first threshold, decreasing a rate of producing hydrogen in response to the detected reduction in the level power below the first threshold, detecting a reduction in a level of power received from the intermittent power source below a second first threshold that is lower than the first threshold, and switching the electrolyzer system into a hot standby mode in which the electrolyzer system does not produce hydrogen and maintains the least one electrolyzer cell stack above a predetermined threshold temperature.
Absstract of: US2025198025A1
A method of operating an electrolyzer module includes providing a first air stream and steam into a stack of electrolyzer cells located in a hotbox and outputting a product stream containing hydrogen and steam, and an oxygen exhaust stream, providing the product stream to an internal product cooler (IPC) heat exchanger located in the hotbox to reduce the temperature of the product stream by transferring heat to the first air stream, and providing the product stream from the IPC to an external product cooler (EPC) heat exchanger located outside of the hotbox and inside of a cabinet housing the hotbox to further reduce the temperature of the product stream by transferring heat to a fluid stream.
Absstract of: US2025198026A1
Disclosed herein are aspects of a composition comprising one or more metal-oxide nanoparticles and porous catalyst layers, comprising an electrically conductive core a surface layer comprising one or more surface active catalysts; and wherein the one or more metal-oxide nanoparticles are electrocatalytic toward oxygen gas evolution in alkaline conditions, alkaline-ionomer conditions, or a combination thereof. Aspects of a method of making such compositions for water oxidation alkaline and alkaline membrane electrolyzers are also disclosed herein. Also disclosed herein is an alkaline-exchange-membrane ionomer-based, hybrid liquid-alkaline, alkaline-ionomer electrolyzer comprising an anode, wherein the anode comprises (i) an ionomer and (ii) the composition disclosed herein and a liquid alkaline electrolyzer comprising an anode, wherein the anode comprises one or more catalysts having the composition disclosed herein, wherein the composition is produced as a powder or as a continuous electrode architecture on metal porous transport layers.
Absstract of: US2025198020A1
A hydrogen gas generation system comprises a reactor chamber, an elongate cathode, an ammonia inlet, a hydrogen gas outlet, and a collection outlet. The reactor chamber has an input end and an output end. A wall of the reactor chamber between the input end and the output end is an anode. The elongate cathode extends between the input end and the output end through an interior of the reactor chamber. The ammonia inlet is positioned to introduce a liquid ammonia into the reactor chamber such that the liquid ammonia flows in a direction from the input end to the output end. The hydrogen gas outlet at the output end, wherein a hydrogen gas generated in the reactor chamber exits the reactor chamber through the hydrogen gas outlet. The collection outlet is at the output end. Nitrogenous compounds exit the reactor chamber through the collection outlet.
Absstract of: US2025198023A1
An electrolyzer for gaseous production such as hydrogen gas includes an oscillating electrode driven at a natural frequency of the gaseous bubbles improves output by readily removing the gaseous bubble product from the electrode surface, thereby exposing greater electrode surface area for subsequent electrolysis reactions. A natural frequency of the gaseous product determines an oscillation frequency with which to drive the electrode accumulating the gaseous product, such as hydrogen bubbles, to agitate and release the bubbles which then rise to the surface of the liquid filled containment. Integrating oscillation logic for agitating the otherwise stationary electrode or cathode in a PEM water electrolyzer improves hydrogen production by readily evacuating the generated hydrogen to free up the electrode area for additional electrolysis reactions.
Absstract of: US2025198014A1
An electrolyzer system includes a splitter configured to split a first air inlet stream into a bypass air stream and a second air inlet stream, a stack of electrolyzer cells configured receive steam and the second air inlet stream and output a product stream containing hydrogen and an oxygen exhaust stream, such that the bypass air stream is configured to bypass the stack, and a product cooler heat exchanger configured to cool the product stream using the first air inlet stream.
Absstract of: US2025196071A1
The present invention relates to a hydrogen ion conductive multilayer composite membrane comprising one or more inner reinforced membrane comprising a porous PTFE layer impregnated with an ionomer composition and outer reinforced membranes positioned on both sides of the inner reinforced membrane, wherein the outer reinforced membranes comprise a porous PTFE layer impregnated with an ionomer composition.
Absstract of: US2025202278A1
A power plant is configured to output power to a grid power system and comprises a hydrogen generation system configured to produce hydrogen, a gas turbine combined cycle power plant comprising a gas turbine engine configured to combust hydrogen from the hydrogen generation system to generate a gas stream that can be used to rotate a turbine shaft and a heat recovery steam generator (HRSG) configured to generate steam with the gas stream of the gas turbine engine to rotate a steam turbine, a storage system configured to store hydrogen produced by the hydrogen generation system, and a controller configured to operate the hydrogen generation system with electricity from the grid power system when the grid power system has excess energy and balance active and reactive loads on the grid power system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.
Absstract of: US2025201888A1
Disclosed are an insulating manifold for electrochemical reaction configured to receive gas from an external source, and an electrochemical reaction system in which there is no electrical contact between a stack and a manifold. The insulating manifold for the electrochemical reaction includes a plate-shaped base manifold having at least a first fluid conduit and a second fluid conduit extending therethrough vertically; a housing disposed on top of the base manifold and having a vertical wall and an open bottom surface, wherein a lower edge of the housing is coupled to a top of the base manifold; and upper and lower insulating plates respectively defining an upper surface and a lower surface of an inner space defined by the base manifold and the housing.
Absstract of: US2025186304A1
A hydrogen generation device includes a tubular tank and a top lid combined with the tank. An immersion tube in which a hydrogen generating agent package is stuffed is placed in the tank. The hydrogen generating agent package is submerged in water after water is poured in the tank to generate hydrogen, which is released through a tank opening of the tank. The hydrogen generating agent package accommodates hydrogen generating agent powders including calcium oxide and aluminum powders, both of which are mixed and wrapped with a nonwoven fabric, as well as a little catalytic sodium carbonate added inside. For inhibition of free radicals and promotion of metabolism, the hydrogen generation device is further provided with a connector and a hose for a skin-care instrument, a nasal mask, an eye shield or an ear cleaner through which hydrogen is supplied as required.
Absstract of: US2025197314A1
A hydrocarbon production system includes: an impurity removal device that removes an impurity including any one or both of oxygen and a sulfur component from a mixed gas containing the impurity and carbon dioxide; a hydrocarbon production device, which includes a hydrocarbon synthesis catalyst for promoting a reaction for synthesizing hydrocarbon from carbon dioxide and hydrogen and synthesizes the hydrocarbon from the carbon dioxide contained in the mixed gas having the impurity removed by the impurity removal device and hydrogen; and a heat supply unit that supplies reaction heat generated in the hydrocarbon production device to the impurity removal device.
Absstract of: US2025196120A1
The present invention provides a method for producing a heterojunction photocatalyst having higher catalytic activity than that of conventional heterojunction photocatalysts, and a heterojunction photocatalyst. A method for producing a heterojunction photocatalyst having a solid state mediator between a hydrogen-evolution photocatalyst and an oxygen-evolution photocatalyst, which includes the following step 1: step 1: a step of joining the solid state mediator onto the oxygen-evolution photocatalyst by at least one method selected from the group consisting of a photoelectrodeposition method, an impregnation supporting method, and a precipitation method, in each of which an organic carboxylic acid compound and a solid state mediator or a precursor of the solid state mediator are used.
Absstract of: US2025196119A1
The present invention provides a heterojunction photocatalyst having higher catalytic activity than that of conventional junction photocatalysts. The heterojunction photocatalyst of the present invention is a heterojunction photocatalyst having a solid state mediator between a hydrogen-evolution photocatalyst and an oxygen-evolution photocatalyst, in which the solid state mediator and the hydrogen-evolution photocatalyst are joined to each other via an ionic polymer.
Absstract of: US2025197205A1
Disclosed is an apparatus for producing hydrogen gas from ammonia gas using a laser. A decomposition device for decomposing ammonia gas in order to produce hydrogen gas includes an ammonia inlet provided at an uppermost end of the decomposition device to allow ammonia gas to easily flow into the decomposition device, a hydrogen outlet configured to discharge the hydrogen gas produced by decomposition of the ammonia gas, and a nitrogen outlet configured to discharge nitrogen gas produced by the decomposition of the ammonia gas. Laser light in a preset first wavelength band is incident from an outside to a contact point of the ammonia inlet, the hydrogen outlet, and the nitrogen outlet, so that the ammonia gas is decomposed.
Absstract of: US2025198013A1
A method of preparing hydrogen based on micro-droplets includes: S1, mixing water and a regulator to obtain an aqueous solution, where the regulator is one or more of: a metal conductor, a nanomaterial, a conductive polymer, and an inorganic salt having a redox property; S2, inputting the aqueous solution to a micro-droplet generation device to generate the micro-droplets, where each of the micro-droplets has a size of less than or equal to 10 μm, and hydrogen radicals are spontaneously generated at a gas-liquid interface of each of the micro-droplets; S3, the hydrogen radicals being compounded with each other to generate the hydrogen; and S4, collecting the hydrogen or the hydrogen radicals.
Absstract of: WO2025127476A1
Provided is a membrane-electrode assembly for a water electrolysis cell, comprising: a polymer electrolyte membrane having an active area and an inactive area surrounding the active area; a hydrogen generation electrode positioned on a first surface of the active area of the polymer electrolyte membrane; an oxygen generation electrode positioned on a second surface of the active area of the polymer electrolyte membrane; a first sub-gasket which is disposed on a first surface of the inactive area of the polymer electrolyte membrane and which surrounds a first electrode; and a second sub-gasket which is disposed on a second surface of the inactive area of the polymer electrolyte membrane and which surrounds a second electrode, wherein the first sub-gasket has a first window that accommodates the hydrogen generation electrode, and a first water supply path that surrounds the first window and exposes the inactive area of the polymer electrolyte membrane.
Absstract of: WO2025127502A1
Provided according to exemplary embodiments of the present invention is an ammonia decomposition system capable of minimizing the generation of iron nitride, which is a by-product.
Absstract of: WO2025127054A1
The present disclosure provides at least one of an iridium-containing manganese oxide that exhibits high oxygen-generating electrode catalytic activity in a water electrolysis method, a catalyst that contains the same, an electrode that contains the catalyst, and a water electrolysis method that uses the electrode. With respect to the iridium-containing manganese oxide according to the present invention, the molar ratio of iridium to manganese is not less than 0.001 but 0.250 or less. In one embodiment, the manganese oxide is manganese dioxide that has a β-type crystal structure. In another embodiment, the ratio of the lattice constant in the a-axis direction to the lattice constant in the c-axis direction is not less than 1.420 but less than 1.521.
Absstract of: WO2025126547A1
The present invention addresses the problem of providing a hydrogen storage system in which the deterioration of a storage alloy can be suppressed. The present invention relates to a hydrogen storage system provided with a hydrogen production part for producing hydrogen and a storage tank, wherein the storage tank is provided with: a storage alloy which stores the produced hydrogen; a housing in which the storage alloy is housed; a first opening which is provided in the housing and into which a supply gas containing the produced hydrogen is sent from the hydrogen production part side; and a second opening which is provided in the housing separately from the first opening and from which the supply gas is sent out to the outside.
Absstract of: WO2025126639A1
Provided is a method for producing a hydrogen gas, which enables the production of a hydrogen gas with high energy efficiency. This method for producing a hydrogen gas includes: placing water between electrodes; and allowing pulsed discharge to occur between the electrodes to decompose water molecules, thereby generating the hydrogen gas. In the method, the frequency for the pulsed discharge is 190-196 kHz or a double vibration frequency thereof.
Absstract of: WO2025124766A1
The invention relates to an electrolytic cell (01) for the electrolysis of CO2, comprising a cathode side (02) and an anode side (03). The electrolytic cell (01) comprises a cathode plate (04), a gas chamber (06), a gas-diffusion layer (08), a catalyst layer (09), a water chamber (07) and an anode plate (05). The contacting of the catalyst layer (09) is optimized by using a plurality of current bridges (10). To this end, these current bridges (10) are electrically conductively connected to the cathode plate (04) and to the catalyst layer (09) while penetrating the gas-diffusion layer (08).
Absstract of: EP4570949A1
A hydrogen gas generation system comprises a reactor chamber, an elongate cathode, an ammonia inlet, a hydrogen gas outlet, and a collection outlet. The reactor chamber has an input end and an output end. A wall of the reactor chamber between the input end and the output end is an anode. The elongate cathode extends between the input end and the output end through an interior of the reactor chamber. The ammonia inlet is positioned to introduce a liquid ammonia into the reactor chamber such that the liquid ammonia flows in a direction from the input end to the output end. The hydrogen gas outlet at the output end, wherein a hydrogen gas generated in the reactor chamber exits the reactor chamber through the hydrogen gas outlet. The collection outlet is at the output end. Nitrogenous compounds exit the reactor chamber through the collection outlet.
Absstract of: AU2023363865A1
Electrochemical cell system (100) which comprises an electrochemical cells arrangement (10), a control unit (20) configured to operate the electrochemical cells arrangement (10) only as electrolytic cells or only as fuel cells, a heat unit (40), external to the electrochemical cells arrangement (10), which is thermally coupled to the electrochemical cells arrangement (10) and which is configured to alternately store heat from the electrochemical cells arrangement (10) to the heat unit (40) and supply heat from the heat unit (40) to the electrochemical cells arrangement (10), and a transfer arrangement (30) configured to alternately transfer heat from the electrochemical cells arrangement (10) to the heat unit (40) and from the heat unit (40) to the electrochemical cells arrangement (10).
Absstract of: AU2023285309A1
The present invention relates to a framing structure for an electrolyser subject to internal pressure, able to withstand corrosive environments and radial pressure forces. The present invention also relates to an electrolytic cell and electrolyser equipped with said framing structure, as well as its use in high-pressure water electrolysis applications.
Nº publicación: DE102024125854A1 18/06/2025
Applicant:
QUEST ONE GMBH [DE]
Quest One GmbH
Absstract of: DE102024125854A1
Verfahren zur Konditionierung einer Elektrolysevorrichtung (10), die zur Erzeugung von Wasserstoff aus Wasser mit Hilfe von elektrischem Strom eingerichtet ist, wobei die Elektrolysevorrichtung (10) vor dem Einbau in eine Wasserstoffproduktionsanlage zumindest einer chemischen Konditionierung über ein Durchspülen der Elektrolysevorrichtung (10) unterzogen wird.
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