Absstract of: US2023092115A1

A device and a method for recovering by-product oxygen from water-electrolysis hydrogen production using a low-temperature method are provided, solving the waste problem of by-product oxygen in the green water-electrolysis hydrogen production system. The device according to the present disclosure comprises an oxygen clarifying system, a pressurizing and heat exchanging system, and a circulating gas compression and expansion refrigeration system. The recovering method according to the present disclosure comprises the following steps: first clarifying and purifying the by-product oxygen from water-electrolysis hydrogen production is to remove hydrogen, carbon monoxide, carbon dioxide, water and other impurities in the oxygen; and then, liquefying, pressurizing and heat exchanging the pure oxygen to obtain the product oxygen and liquid oxygen with required pressure. In the whole process, the cooling capacity is provided by the circulating gas expansion refrigeration system.

Absstract of: EP4151922A1

The invention relates to a hot water installation and method, the installation comprising:- a feed for supplying a liquid flow to be heated;- a burner configured to combust a gas (mixture) for the purpose of heating the liquid flow;- a discharge for discharging the heated liquid flow;- a gas feed connected operatively to the burner;- a gas mixer configured to mix a supply of a hydrocarbon gas with a gas mixture of oxygen and hydrogen;- an electrolysis system connected operatively to the gas mixer and configured to produce the gas mixture of oxygen and hydrogen,further comprising:- a dehumidifier configured to dehumidify the gas mixture of oxygen and hydrogen produced with the electrolysis system; and- a heat exchanger connected operatively to the electrolysis system and the feed of the liquid flow to be heated, and configured to preheat the liquid flow to be heated.

Absstract of: GB2610995A

A method and system for electrochemically regenerating hydroxide (MOH) and carbon dioxide (CO2) from an alkali metal carbonate (M2CO3) is carried out by an electrochemical reactor that can replace a conventional thermochemical causticizing operation in a DAC system. The electrochemical reactor comprises: a cathode having an inlet for receiving an electrolyte feed stream comprising MOH, M2CO3 and H2O, and an outlet for discharging an electrolyte product stream comprising MOH, M2CO3, H2O and H2; a porous hydrophilic transport barrier in adjacent contact with the cathode; a porous hydrophilic anode in adjacent contact with the transport barrier configured and operable to generate CO2 in the presence of MOH while suppressing their recombination; a porous hydrophobic CO2 and O2 separation barrier in adjacent contact with the anode; and a product gas exit channel in adjacent contact with the CO2 and O2 separation barrier and for discharging an anode product stream comprising at least CO2.

Absstract of: WO2023035491A1

The present application belongs to the technical field of renewable energy utilization and greenhouse gas emission reduction, and specifically relates to a renewable-energy-driven system and method for synthesizing formic acid by means of carbon dioxide hydrogenation. The system comprises a carbon dioxide capture apparatus, a hydrogen production apparatus, a formic acid synthesis apparatus and a renewable energy power generation apparatus. By means of cooperation among the apparatuses, the system can directly use carbon dioxide in the air and surplus electric energy of the renewable energy power generation apparatus to synthesize high-energy formic acid, such that serious waste of renewable energy in the troughs of electricity consumption is reduced, so as to solve the problem of electricity curtailment of renewable energy, and the content of carbon dioxide greenhouse gas in the air is also reduced. In addition, resource utilization of the carbon dioxide gas is further realized, the high-energy compound formic acid is obtained, and the transportation cost of raw materials is reduced.

Absstract of: WO2023037755A1

Provided is an electrochemical hydrogen pump provided with an electrolyte membrane, an anode provided on one of the main surfaces of the electrolyte membrane, a cathode provided on the other of the main surfaces of the electrolyte membrane, and an anode separator provided on the anode, a cathode separator provided on the cathode, and a voltage application device for applying a voltage between the anode and the cathode. The electrochemical hydrogen pump is an apparatus configured such that hydrogen in a hydrogen-containing gas supplied to the anode is transferred to the cathode through the electrolyte membrane by applying the voltage by means of the voltage application device, thereby generating compressed hydrogen. The anode includes an anode catalyst layer and an anode gas diffusion layer, in which, in the anode gas diffusion layer, the surface roughness of the anode-separator-side main surface is larger than the surface roughness of the anode-catalyst-layer-side main surface.

Absstract of: WO2023035089A1

The invention relates to a system for the circular production of hydrogen and oxygen with feedback of thermal energy waste recovered in the Stirling engine step and in the electrolysis step, to increase the process efficiency of subsystems that transform the conversion of heat into electrical energy to operate a hydrogen electrolyser.

Absstract of: WO2023035914A1

A hydrogen generation device having a heat sink, which comprises a water tank, an electrolytic cell, and a heat sink. The water tank has an accommodating space for accommodating electrolyzed water. The electrolytic cell is disposed in the accommodating space of the water tank, and is used for receiving the electrolyzed water from the water tank and electrolyzing the electrolyzed water to generate a hydrogen-containing gas. The heat sink is coupled to the water tank and comprises a water inlet pipe, a water outlet pipe, and at least one tubular structure. The water inlet pipe is connected to a side wall of the water tank and is used for receiving the electrolyzed water from the water tank. The water outlet pipe is connected to the side wall of the water tank and is used for outputting the electrolyzed water to the water tank. The tubular structure communicates with the water inlet pipe and the water outlet pipe to allow electrolyzed water to pass through. According to the present invention, a heat sink and a fan are arranged in a heat dissipation air duct to reduce the heat of the heat sink, thereby improving the heat dissipation efficiency. Alternatively, the electrolyzed water in the water tank can be guided to the heat sink for heat dissipation by means of a pump, thereby improving the heat dissipation efficiency. Moreover, the heat dissipation efficiency can also be improved by means of a structure in the tubular structure of the heat sink which has an extended path length

Absstract of: AU2021221481A1

A process (100) for producing hydrogen (50) comprises the steps of: operating a compressor (20) driven by a prime mover (22), operation of the prime mover (22) producing an exhaust gas (27); recovering heat from said exhaust gas (27) by a waste heat to power system (70) to produce electricity (80); and using the electricity (80) to conduct electrolysis of water to produce hydrogen (50) and oxygen (68). Hydrogen (50) is conveniently delivered for blending with a fluid in a nearby pipeline (10). - - - - -

Absstract of: US2023079666A1

The present invention relates to an electrode assembly and an electrolyser using one or more of said assemblies, in particular the present invention provides an electrode assembly for the production of hydrogen comprising: i) an anode structure which comprises an anode located within an electrolysis compartment, ii) a cathode structure which comprises a cathode located within an electrolysis compartment containing a solution of an alkali metal hydroxide, characterised in that the cathode comprises: a) An electrically conductive metal substrate, and b) An electrocatalytic layer on the substrate and comprising a, at least one metal selected from platinum group metals, rhenium, nickel, cobalt and molybdenum and b. at least 50% by volume of an electrically conductive support material, wherein the electrically conductive support material is formed from particles having an average particle size of less than 5 microns (5 μm) and which are not metallic particles.

Absstract of: US2023079115A1

A method for transporting liquid methane includes generating electricity in plants; using the electricity to split water into hydrogen and oxygen; providing carbon dioxide; feeding the hydrogen and the carbon dioxide from step into a reactor system for producing methane, wherein this reactor system comprises a catalytic reactor cooled with boiling water; liquefying the methane so produced; transporting the liquefied methane to a place of consumption located far away; utilising the liquefied methane at the place of consumption subject to generating carbon dioxide;) separating this carbon dioxide. At the place of consumption the methane is subjected to a steam reformation for producing hydrogen, wherein carbon dioxide is generated. At least a part of the carbon dioxide generated during the steam reformation is transported back to the reactor system for producing methane.

Absstract of: US2023078347A1

A buoyant hydrodynamic pump is disclosed that can float on a surface of a body of water over which waves tend to pass. Embodiments incorporate an open-bottomed tube with a constriction. The tube partially encloses a substantial volume of water with which the tube's constriction interacts, creating and/or amplifying fluid-flow oscillations therein in response to wave action. Wave-driven oscillations result in periodic upward ejections of portions of the water inside the tube that can be collected in a reservoir that is at least partially positioned above the mean water level of the body of water, or pressurized by compressed air or gas, or both. Water within such a reservoir may return to the body of water via a turbine, thereby generating electrical power (making the device a wave engine), or the device's pumping action can be used for other purposes such as water circulation, propulsion, dissolved minerals extraction, or cloud seeding. Methods are disclosed for manufacture of hydrogen at sea and for delivery of said hydrogen using a ship. Methods are disclosed for filling a hydrogen-loaded carrier ship at sea.

Absstract of: US2023081628A1

A capillary electrolysis in alkaline solution to produce hydrogen has a container having a plurality of polarized electrodes immersed in a chemical solution. A power source to generate the required electricity to produce a chemical reaction between the chemical solution and the electrodes.

Absstract of: WO2023036068A1

A hydrogen water generating device with a warning function, and a hydrogen production system thereof. The hydrogen water generating device comprises a cup body for accommodating water, and a gas intake structure, a holder, a refining pipe, a gas output structure, and a water passing structure that are arranged on the cup body. The gas intake structure receives a hydrogen-containing gas from the outside of the cup body, the refining pipe is located in the accommodating space of the cup body and is coupled to the gas intake structure, the gas output structure is used for receiving the hydrogen-containing gas from the accommodating structure and outputting the hydrogen-containing gas to the outside of the cup body, and the water passing structure is used for outputting water in the accommodating space to the outside of the cup body. The hydrogen-containing gas enters the water in the accommodating space by means of the gas intake structure and the refining pipe, thereby generating hydrogen water and a humidifying gas, which are respectively output to the outside of the cup body by the water passing structure and the gas output structure. When the system operates normally, the cup body emits light of a first color, and when the system operates abnormally, the cup body emits light of a second color.

Absstract of: WO2023038034A1

In the present invention, hydrocarbon production equipment comprises a first reaction device that generates a first intermediate gas by accepting a raw material gas and reacting the raw material gas using a catalyst, a second reaction device that generates a second intermediate gas by reacting the first intermediate gas using a catalyst, a heat supplier with which heat for heating the catalyst can be supplied to a reactor and with which heat for heating the catalyst can be supplied to a reactor, and a controller for controlling the operation of the heat supplier. The controller selectively outputs to the heat supplier a first control signal that causes heat to be supplied to each of the first reaction device and the second reaction device or a second control signal that causes heat to be supplied to only one of the first reaction device and the second reaction device. The controller selects either the first control signal or the second control signal on the basis of the amount of hydrogen contained in the raw material gas.

Absstract of: US2023081521A1

The present invention relates to a technique for treating a raw material, such as combustible waste, and more particularly to combustion, and pyrolysis and gasification treatment techniques that does not emit carbon dioxide into the atmosphere. A treatment apparatus includes a fluidized-bed furnace having a pyrolysis chamber and a combustion chamber therein, the pyrolysis chamber and the combustion chamber are separated by a partition wall, an electrolysis device configured to electrolyze water to generate hydrogen and oxygen, a methanation reactor configured to produce methane from carbon dioxide discharged from the combustion chamber and the hydrogen, a first fluidizing-gas supply line configured to supply a first fluidizing gas to the pyrolysis chamber, and a second fluidizing-gas supply line configured to introduce a second fluidizing gas to the combustion chamber, the second fluidizing gas including the oxygen and a part of the carbon dioxide.

Absstract of: US2023078714A1

A hydrogen system includes: a compressor that includes an anode, a cathode, and an electrolyte membrane interposed therebetween and generates compressed hydrogen by applying a voltage between the anode and the cathode to move protons extracted from anode fluid supplied to the anode to the cathode; a voltage applicator that applies the voltage between the anode and the cathode; a first flow passage through which a cathode off-gas containing the compressed hydrogen discharged from the cathode is supplied to the anode of the compressor; a first on-off valve disposed in the first flow passage; and a controller that causes the voltage applicator to apply the voltage with the first on-off valve opened during a period of time from startup of the hydrogen system until supply of the cathode off-gas to a hydrogen reservoir is started.

Absstract of: WO2023036560A1

Method for controlling an ammonia plant (1), wherein the ammonia plant (1) comprises an ammonia synthesis section (202) with an ammonia converter and a hydrogen generation section (200) connected to a hydrogen storage tank (5), the method includes controlling the amount of hydrogen (13) stored or delivered to the ammonia synthesis section to maintain target ranges of: the amount of hydrogen contained in the hydrogen tank (5); the flow rate of hydrogen delivered to the ammonia synthesis section; the flow rate of feed gas fed to said ammonia converter.

Absstract of: WO2023036857A1

The present invention relates to a process and a system for the production of hydrogen and carbon dioxide starting from a feed stream comprising carbon monoxide, which is reacted with water and a halogen reactant. The process in particular comprises the steps of: a) reacting in a first reaction zone a feed stream comprising carbon monoxide (CO) with water (H2O) and bromine (Br2) under reaction conditions effective to produce a gaseous CO2-containing effluent stream and an aqueous solution of hydrogen bromide (HBr); and, b) supplying said aqueous solution of hydrogen bromide (HBr) to a second reaction zone and decomposing said hydrogen bromide (HBr) under conditions effective to produce a gaseous H2-rich stream and a stream comprising bromine (Br2), wherein said hydrogen bromide is decomposed in step b) by means of electrolysis.

Absstract of: WO2023036387A1

A hydrogen generation system comprising a wind turbine rotor coupled to a generator, wherein the generator is electrically coupled to a DC-link by way of a primary power converter, the DC-link having a power dissipation element. The system also comprises a hydrogen electrolysis system coupled to the DC-link; an auxiliary power converter coupled to the DC-link; and one or more auxiliary loads. The auxiliary power converter comprises an energy storage system and is electrically coupled to the one or more auxiliary loads to provide operating power thereto. Furthermore, the system comprises a control system coupled to the auxiliary power converter, the primary power converter and the hydrogen electrolysis system, wherein the control system is configured to operate the auxiliary power converter, the primary power converter and the hydrogen electrolysis system to control the voltage on the DC-link to remain with a predetermined range. Beneficially, the system of the invention manages the primary power converter to provide power to the electrolysis system, and the auxiliary power converter, to provide power to at least the auxiliary loads, in such a way as to optimise the generation of hydrogen by the electrolyser whilst decoupling the performance of the electrolyser from varying wind conditions.

Absstract of: WO2021259914A1

The present invention relates to an electrode and in particular to an electrode suitable for use as a cathode for the development of hydrogen in industrial electrolytic processes, equipped with a catalytic coating comprising an external layer containing ruthenium and selenium; and to a method for the production of the same.

Absstract of: EP4148242A1

The subject of the invention is a system enabling the storage of electricity - preferably renewable electricity - and the regulation of the electricity system, which includes at least one methanization reactor producing biomethane from carbon dioxide and hydrogen, at least one water electrolyzer producing hydrogen and oxygen, pumps, heat exchangers, valves, compressors, pipelines connecting the individual elements and the control system. The feature of the solution is that the system also includes at least one gas engine (1) that can be operated using air burning in traditional way or in carbon dioxide generating mode. The exhaust pipe (2) of the gas engine (1) is connected via a valve (52) and at least one heat exchanger (8, 9, 48) to a separator (10) for dewatering the flue gases leaving the exhaust pipe (2). The separator (10) is connected on the one hand to a first water purifier (55) and on the other hand through additional heat exchangers (12, 13, 15, 19, 20, 23, 49), compressors (14, 16) and valve (24) to a buffer tank (25) provided to store carbon dioxide. The buffer tank (25) is connected to the methanization reactor (33) via a carbon dioxide supply valve (29) on the one hand, and on the other hand, via a carbon dioxide valve (28) and a mixing valve (45) as well as an additional valve (46) and a static mixing element (47) to the inlet of the gas engine (1). The methanization reactor (33) is connected to the hydrogen output of the water electrolyzer (40) via a hydroge

Absstract of: EP4148017A1

The present disclosure relates to a natural gas reforming system capable of reducing, by using a co-electrolysis device, the emission amount of carbon dioxide produced by reforming natural gas, of supplying heat to a reformer through syngas produced by the co-electrolysis, and of producing additional hydrogen, and a process thereof.

Absstract of: EP4148104A1

The invention relates to a method of producing climate-neutral fuel, in which producing electrical energy using solar cells (10) and with the energy produced:(a) producing carbon dioxide and hydrogen from air and/or water,(b) preparing a hydrocarbon mixture from carbon dioxide and hydrogen gases using a one or more step chemical and/or electrochemical process,(c) separating the hydrocarbon mixture into one or more fuel fractions (5a) and one or more energy carrier fractions (5b),(d) producing climate-neutral fuel from the fuel fraction (5a),(e) producing energy using the one or more energy carrier fractions (5b), while steps (a)-d) are repeated and at least part of the instantaneous energy demand of steps (a)-d) is covered by the energy thus produced.The invention further relates to a system (100) for carrying out the method according to the invention.

Absstract of: US2023079115A1

A method for transporting liquid methane includes generating electricity in plants; using the electricity to split water into hydrogen and oxygen; providing carbon dioxide; feeding the hydrogen and the carbon dioxide from step into a reactor system for producing methane, wherein this reactor system comprises a catalytic reactor cooled with boiling water; liquefying the methane so produced; transporting the liquefied methane to a place of consumption located far away; utilising the liquefied methane at the place of consumption subject to generating carbon dioxide;) separating this carbon dioxide. At the place of consumption the methane is subjected to a steam reformation for producing hydrogen, wherein carbon dioxide is generated. At least a part of the carbon dioxide generated during the steam reformation is transported back to the reactor system for producing methane.

Absstract of: EP4148020A1

Method for controlling an ammonia plant (1), wherein the ammonia plant (1) comprises an ammonia synthesis section (202) with an ammonia converter and a hydrogen generation section (200) connected to a hydrogen storage tank (5), the method includes controlling the amount of hydrogen (13) stored or delivered to the ammonia synthesis section to maintain target ranges of: the amount of hydrogen contained in the hydrogen tank (5); the flow rate of hydrogen delivered to the ammonia synthesis section; the flow rate of feed gas fed to said ammonia converter.