Alerta

HYDROGEN AND OXYGEN DEPLETING SYSTEM WITHIN A WATER ELECTROLYSIS INSTALLATION AND RELATED PROCESS

Resumen de: US2025354283A1

A water electrolysis installation includes a dioxygen separator configured to separate a mixture of electrolyte and dioxygen and to obtain an electrolyte with dissolved dioxygen; a dihydrogen separator to separate a mixture of electrolyte and dihydrogen and to obtain an electrolyte with dissolved dihydrogen; a recombination zone configured to receive the electrolytes to produce, at a mixing region, a mixed electrolyte stream. The installation includes a dihydrogen and/or dioxygen depleting system, including a catalyst configured to react dioxygen and dihydrogen dissolved in the mixed electrolyte stream, to produce a treated electrolyte stream with reduced dioxygen and dihydrogen. The depleting system is positioned in contact with the mixed electrolyte stream downstream of the mixing region and upstream of the inlet of the electrochemical stack device.

Framing Structure For An Electrolyser

Resumen de: US2025354276A1

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.

ELECTROCHEMICAL WATER SPLITTING WITH A NIVOX CATALYST

Resumen de: US2025354278A1

An electrocatalyst and a method of preparing the electrocatalyst are described. The electrocatalyst includes a porous foam substrate; and a catalytically active layer comprising NiVOx nanostructures, the catalytically active layer being disposed on an exterior surface and an interior pore surface of the porous metal foam substrate; where “x” is in the range of 1 to 3. A method of using the electrocatalyst for water oxidation is also described.

SYSTEM AND METHOD FOR INCREASING HYDROGEN PRODUCTION IN ELECTROLYZERS

Resumen de: US2025354280A1

Polymer electrolysis membrane (PEM) or alkali electrolyzers are provided. The PEM or alkali electrolyzers have a compact structure that produces high-purity hydrogen and a device and method for increasing the hydrogen production efficiency of these devices. An electrolyzer control circuit includes: an electrolysis cell, a mosfet, a square wave oscillator integration, a potentiometer, a mosfet driver integration, a first resistance, a second resistance, a first adjustable direct current power supply, a second adjustable direct current power supply, and an oscilloscope.

LUNAR WATER COLLECTION DEVICE

Resumen de: US2025354490A1

Techniques and systems extract water from lunar regolith using microwave radiation and may also produce fuel from the extracted water. The system can distill the extracted water to remove impurities before electrolyzing the purified water into oxygen and hydrogen gases, which may then be cooled to form liquid oxygen and liquid hydrogen. A portion of the system may reside on a lunar landing module. Another portion of the system may be affixed to a robotic arm that is extendable from the lunar landing module. This portion of the system includes a water extraction unit, comprising a cone used as a cold trap. The cone may include cooling channels to keep the temperature of the smooth inner surface of the cone cold enough to trap particles of frost that attach to the inner surface. The frost is then scraped from the inner surface and collected.

PRODUCTION OF NANOCHALCOGENIDES FOR USE IN ELECTROCATALYSIS

Resumen de: US2025353758A1

The present description relates to metal alloy electrocatalysts, preferably composed of Ni and Co as transition metals and Se as a chalcogen. The electrocatalysts can take the form of nanochalcogenides that can be made using cryogenic milling followed by surfactant-assistant milling. The electrocatalysts can be used in the context of water electrolysis or electroreduction of CO2 gas into carbon based products.

METHODS AND PROCESSES FOR THE USE OF CALCIUM- AND MAGNESIUM-BEARING OXIDES, HYDROXIDES, AND SILICATES; CALCIUM- AND MAGNESIUM-BEARING AQUEOUS STREAMS TO CAPTURE, CONVERT, AND STORE CARBON DIOXIDE AND PRODUCE HYDROGEN

Resumen de: US2025353740A1

The present disclosure relates to methods for producing hydrogen and calcium- or magnesium-bearing carbonates by capturing, converting, and storing carbon dioxide. The methods may include providing one or more calcium- or magnesium-bearing compounds; providing one or more water-soluble oxygenates; providing a plurality of catalysts; and reacting one or more calcium- or magnesium-bearing compounds and one or more water-soluble oxygenates with plurality of catalysts under conditions to produce hydrogen and calcium- or magnesium-bearing carbonates. The methods may include providing one or more calcium- or magnesium-bearing silicates; providing carbon monoxide; providing water vapor; and reacting one or more calcium- or magnesium-bearing silicates, carbon monoxide, and water vapor. The methods may include providing one or more calcium- or magnesium-bearing compounds; providing one or more water-soluble oxygenates; providing a catalyst; and reacting one or more calcium- or magnesium-bearing compounds and one or more water-soluble oxygenates with said catalyst.

ALLOY MATERIALS AND RELATED METHODS FOR PROCESSING HYDROGEN SULFIDE

Resumen de: US2025353743A1

A multi-metal composition and a method utilizing the multi-metal composition is disclosed. The multi-metal composition may comprise: an alloy comprising at least five elements selected from the group consisting of Co, Cr, Fe, Mn, Ni, Al, Mg, Cu, Zn, Zr, Ru, Rh, Pd, Ag, W, Re, Ir, Pt, Pd, Au, Ce, Yb, Sn, Ca, Be, Mo, V, W, and Sr. The method may comprise: providing a multi-metal composition comprising an alloy comprising at least five elements selected from the group consisting of Co, Cr, Fe, Mn, Ni, Al, Mg, Cu, Zn, Zr, Ru, Rh, Pd, Ag, W, Re, Ir, Pt, Pd, Au, Ce, Yb, Sn, Ca, Be, Mo, V, W, and Sr; and interacting a gas stream comprising hydrogen sulfide with the multi-metal composition.

METHODS FOR PHOTOCATALYTIC WATER SPLITTING OF PRODUCED WATERS

Resumen de: US2025353738A1

Methods for photocatalytic water splitting of produced waters may comprise introducing a photocatalyst comprising a semiconductor to a produced water comprising ions of sodium, chloride, calcium, magnesium, potassium, sulfate, barium, iron, lithium, strontium, or any combination thereof; in the presence of sunlight, allowing the photocatalyst to facilitate a reduction-oxidation reaction of a plurality of water molecules from the produced water; and obtaining hydrogen and oxygen.

Method to process borate by-products from sodium borohydride hydrolysis

Resumen de: US2025353754A1

The present disclosure relates to a method for processing a liquid by-product of sodium borohydride hydrolysis to obtain a borate compound, the method comprising the following steps: separating the liquid by-product by sedimentation, to obtain a borate-rich supernatant; drying the borate-rich supernatant under vacuum to obtain a solid composition comprising a borate compound. An aspect of the present disclosure relates composition obtainable by the disclosed method comprising at least 90% (w/w) of sodium boron hydroxide and its use as a source of borate in the production of sodium borohydride and/or hydrogen.

A PIEZO PHOTOCATALYTIC PROCESS FOR THE PRODUCTION OF HYDROGEN FROM WATER

Resumen de: US2025353739A1

The present invention is directed to piezo photocatalytic process for the production of hydrogen from water, wherein the process comprises the steps of: (a) providing non-metal-doped barium titanate which includes at least one defect; (b) contacting the non-metal-doped barium titanate provided in step (a) with water to form a mixture; and (c) subjecting the mixture formed in step (b) to: (i) actinic radiation; and (ii) mechanical force, to produce hydrogen from the water, as well as non-metal-doped barium titanate and methods of production thereof.

SYSTEM AND METHOD FOR STABILIZING THE OPERATION OF FACILITIES USING HYDROGEN PRODUCED BY LOW CARBON SOURCES

Resumen de: US2025353737A1

A system and a method for stabilizing hydrogen flow to a downstream process in a facility determining a hydrogen density and pressure profiles in the hydrogen storage unit for different target net hydrogen flows at different time intervals of a time horizon of a renewable power availability profile, determining an operating target net hydrogen flow of a hydrogen feed to the downstream process, determining a target direct hydrogen flow of a hydrogen feed and a target stored hydrogen flow of a hydrogen feed to the downstream process, and controlling the operation of the downstream process based on the operating target hydrogen flows.

DEVICES, SYSTEMS, AND METHODS FOR ELECTROCHEMICALLY PURIFYING HYDROGEN

Resumen de: US2025352946A1

Hydrogen gas purifier electrochemical cells, systems for purifying hydrogen gas, and methods for purifying hydrogen gas are provided. The cells, systems, and methods employ double membrane electrode (DMEA) electrochemical cells that enhance purification while avoiding the complexity and cost of conventional cells. The purity of the hydrogen gas produced by the cells, systems, and methods can be enhanced by removing at least some intermediate gas impurities from the cells. The purity of the hydrogen gas produced by the cells, systems, and methods can also be enhanced be introducing hydrogen gas to the cells to replenish any lost hydrogen. Water electrolyzing electrochemical cells and methods of electrolyzing water to produce hydrogen gas are also disclosed.

水素発生材料

Resumen de: JP2025171335A

【課題】本発明は、水分と反応して分子状水素を発生可能ながらも、金属探知機にかけても誤探知されない水素発生材料を提供することを目的とする。【解決手段】本発明の水素発生材料は、複数の粒子状水素発生剤がマトリックス樹脂中に分散されており、前記マトリックス樹脂中の粒子状水素発生剤の含有量は０．６重量％以上６重量％以下であり、前記粒子状水素発生剤の体積基準平均径Ｄ５０が１μｍ以上５０μｍ以下であることを特徴とする。【選択図】図１

COMPOSITE FOR ELECTROCATALYSIS AND PREPARATION METHOD THEROF

Resumen de: EP4650493A1

The present invention relates to a method of preparing a composite material, in particular one useful as a catalyst in an electrolytic hydrogen evolution reaction and/or the oxygen evolution reaction and/or urea oxidation-assisted water electrolysis. Provided is a method of preparing a composite material, the method comprising the steps of:(i) electrochemically depositing material onto a substrate from a deposition solution comprising a nickel (II) salt and graphene oxide, to obtain a nickel-reduced graphene oxide composite material comprising nickel dispersed on reduced graphene oxide, said composite material being deposited on the substrate;(ii) after step (i), placing the substrate, having the nickel-reduced graphene oxide composite deposited thereon, in an alkaline solution along with a counter electrode; and(iii) after step (ii), partially electrochemically oxidising the nickel, to obtain a partially oxidised nickel-reduced graphene oxide composite material comprising partially oxidised nickel dispersed on reduced graphene oxide, said composite material being deposited on the substrate.The composite of the invention demonstrates high catalytic activity for electrolytic hydrogen production under alkaline water electrolysis conditions (for example, a hydrogen evolution current of up to 500 mA cm^-2 at -1.35 V against a Reversible Hydrogen Electrode). High activity is demonstrated even when the substrate (on which the composite is deposited) does not c

MEMBRANE-ELECTRODE-FRAME-ASSEMBLY FOR ION EXCHANGE MEMBRANE ELECTROLYSER, ELECTROLYSER CELL STACK AND METHOD OF MANUFACTURING

Resumen de: EP4650486A1

The present invention relates to a membrane electrode assembly (100) for a stackable electrolyser cell. The membrane electrode assembly (100) comprises a catalyst coated membrane (CCM) member (110) with a polymer membrane (111) that is at least partially coated with a catalyst coating (112, 113), a frame member (140) for mechanical reinforcement, two porous transport layers (121, 122), and an adhesive layer (150). The adhesive layer (150) forms an adhesive bond between the CCM member (110) and at least the frame member (140) and further, comprises an adhesive overlap section (151) that overlaps with a frame overlap section (141) of the frame member (140). The adhesive overlap section (151) extends inwardly with respect to the peripheral area (115) beyond the frame overlap section (141) to delimit a process area (116) of the CCM member (110). The invention relates further to a solid polymer electrolyte electrolyser cell stack with such membrane electrode assembly (100) and a method of manufacturing said membrane electrode assembly (100).

AMMONIA CRACKING FOR HYDROGEN PRODUCTION

Resumen de: CN120476092A

The invention relates to a method for producing hydrogen from ammonia, comprising: ammonia cleavage in which the ammonia is decomposed into hydrogen and nitrogen, the ammonia cleavage being carried out in a sequence of cleavage steps (13, 36, 17, 20), and a final cleavage stream (21) being obtained after the final cleavage step (20), the final ammonia cracking step (20) is carried out in an adiabatic manner and/or after the final cracking step, the final cracking stream (21) is quenched by direct mixing with water or steam.

WATER ELECTROLYSIS CELL, WATER ELECTROLYSIS CELL STACK, AND MANUFACTURING METHOD OF WATER ELECTROLYSIS CELL

Resumen de: EP4650490A1

A water electrolysis cell according to an embodiment includes: an anode electrode including an anode catalyst layer in which anode catalyst sheets are stacked via a gap, each anode catalyst sheet containing iridium oxide and being in the form of a nanosheet; a cathode electrode including a cathode catalyst layer in which cathode catalyst sheets are stacked via a gap, each cathode catalyst sheet containing platinum and being in the form of a nanosheet; and an electrolyte membrane containing a hydrocarbon-based material, placed between the anode electrode and the cathode electrode.

ELECTROLYSIS SYSTEM AND CONTROL METHOD FOR ELECTROLYSIS SYSTEM

Resumen de: EP4650492A1

Provided is an electrolysis system (100) including an electrolysis module (10); a water vapor supply system (40) that supplies water vapor to a hydrogen electrode; a hydrogen recovery system (50) that recovers hydrogen-enriched water vapor; an air supply system (20) that supplies air to an oxygen electrode; an oxygen recovery system (30) that recovers exhaust air; a hydrogen-enriched water vapor release system (60) that releases hydrogen-enriched water vapor from the hydrogen recovery system (50) into the atmosphere; an exhaust air release system (70) that releases exhaust air from the oxygen recovery system (30) into the atmosphere; a hydrogen-enriched water vapor discharge valve (63) disposed in the hydrogen-enriched water vapor discharge system (60); and an exhaust air discharge valve (73) disposed in the exhaust air discharge system (70), wherein the opening degrees of the hydrogen-enriched water vapor discharge valve (63) and the exhaust air discharge valve (73) are controlled to be adjustable when the electrolytic module (10) is stopped.

ELECTROLYSIS CELL SYSTEM AND ELECTROLYSIS CELL SYSTEM OPERATION METHOD

Resumen de: EP4650491A1

Provided is an electrolysis cell system with energy efficiency improved. An electrolysis cell system (10) includes: an electrolysis cell (11) that has an anode and a cathode and generates hydrogen on the cathode and oxygen on the anode by electrolyzing steam supplied to the cathode; a supply line (20) that supplies air that controls the temperature of the electrolysis cell (11), to the electrolysis cell (11); an exhaust line (30) through which the air exhausted from the electrolysis cell (11) flows; a circulation line (40) that guides the air exhausted to the exhaust line (30), to the supply line (20); and a supply air temperature control heat exchanger (28) that controls the temperature of the air to be supplied to the electrolysis cell (11).

Energy Production Complex System Based on Hydrogen Storage Technology

Resumen de: KR20220009803A

The present invention relates to an energy production complex system based on a liquid compound, including: a water electrolysis device unit for electrolyzing water to produce hydrogen; a hydrogen storage device unit for reacting the hydrogen produced by the water electrolysis unit with a first liquid compound to allow the first liquid compound to become a second liquid compound in which hydrogen is stored; a hydrogen desorption device unit for desorbing the hydrogen stored in the second liquid compound into hydrogen and the first liquid compound; and a fuel cell unit for generating power by receiving the hydrogen desorbed from the hydrogen desorption device unit.

SYSTEM AND METHOD FOR STABILIZING THE OPERATION OF FACILITIES USING HYDROGEN PRODUCED BY LOW CARBON SOURCES

Resumen de: EP4650904A1

A system and a method for stabilizing hydrogen flow to a downstream process in a facility determining a hydrogen density and pressure profiles in the hydrogen storage unit for different target net hydrogen flows at different time intervals of a time horizon of a renewable power availability profile, determining an operating target net hydrogen flow of a hydrogen feed to the downstream process, determining a target direct hydrogen flow of a hydrogen feed and a target stored hydrogen flow of a hydrogen feed to the downstream process, and controlling the operation of the downstream process based on the operating target hydrogen flows.

ELECTROLYSER AND METHOD FOR ITS OPERATION

Resumen de: DK202300028A1

In an electrolyser (1) stack for production of hydrogen gas, multiple bipolar electrically conducting metal seperator plates (21, 25) sandwich membranes. Each seperator plate has raised surface portions (50) towards the membrane (23), forming minor gas channels (40) between the seperator plate (21, 25) and the membrane (23) for transort of produced gas along the seperator plate (21, 25). Each structured area (30A, 30B) with the minor channels (40) is surrounded by a combination of an upper major channel (41) above and a lower major channel (47) below the first structured area (30A), as well as a first major channel (42) and second major channel (49) connecting the lower major channel (47) with the upper major channel (41) on a first and second side. Gas flow through the channels leads to circulation of electrolyte through and around the structured areas (30A, 30B).

HYDROGEN AND OXYGEN DEPLETING SYSTEM WITHIN A WATER ELECTROLYSIS INSTALLATION AND RELATED PROCESS

Resumen de: EP4650488A1

The invention concerns a water electrolysis installation comprising:* a dioxygen separator (60) configured to separate a mixture of electrolyte and dioxygen (28B) and to obtain an electrolyte with dissolved dioxygen (61);* a dihydrogen separator (49) to separate a mixture of electrolyte and dihydrogen (28A) and to obtain an electrolyte with dissolved dihydrogen (51);* a recombination zone (32) configured to receive the electrolytes to produce, at a mixing region (68), a mixed electrolyte stream,The installation comprises a dihydrogen and/or dioxygen depleting system (70), comprising a catalyst configured to react dioxygen and dihydrogen dissolved in the mixed electrolyte stream, to produce a treated electrolyte stream (34) with reduced dioxygen and dihydrogen. The depleting system (70) is positioned in contact with the mixed electrolyte stream downstream of the mixing region (68) and upstream of the inlet of the electrochemical stack device.

A WATER ELECTROLYSIS PROCESS HAVING AN EXTENDED RANGE OF OPERATION AND RELATED INSTALLATION

Nº publicación: EP4650487A1 19/11/2025

Solicitante:

TOTALENERGIES ONETECH [FR]
TotalEnergies OneTech

Resumen de: EP4650487A1

The process comprises:- recovering a mixture of electrolyte and dioxygen from an anodic compartment (19B) and separating it in a dioxygen separator (60) to obtain a dioxygen stream and a dioxygen containing electrolyte stream;- recovering a mixture of electrolyte and dihydrogen from an cathodic compartment (19A) and separating it in a dihydrogen separator (49) to obtain a dihydrogen stream and a dihydrogen containing electrolyte stream ;- recirculating the dioxygen containing electrolyte stream and the dihydrogen containing electrolyte stream.Upon detection of conditions susceptible of leading to a dioxygen to dihydrogen ratio greater than a safety OTH threshold in the cathodic compartment (19A) or/and to a dihydrogen to dioxygen ratio greater than a safety HTO threshold in the anodic compartment (19B), flushing dihydrogen in electrolyte fed to the or each cathodic compartment (19A), and/or flushing dioxygen in electrolyte fed to the or each anodic compartment (19B).