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860
results.
Updated on
15/11/2026 [07:11:00]
Results 175 to 200 of 860
Absstract of: WO2026220024A1
A process for the synthesis of ammonia comprising: reacting a synthesis gas including hydrogen and nitrogen in an ammonia converter of an ammonia synthesis loop to form an ammonia-containing stream; at least one reaction heat recovery step for recovering heat generated by the reaction; wherein each reaction heat recovery step is performed by transferring heat from the ammonia-containing stream to a heat-receiving stream at heat transfer temperature, which is the temperature of the heat-receiving stream after the heat recovery step; performing an ammonia absorption refrigeration process operating with a water-ammonia solution as internal working fluid to produce refrigeration; wherein at least one reaction heat recovery step having a heat transfer temperature of at least 120 °C is arranged to transfer recovered heat to the ammonia absorption refrigeration process; wherein refrigeration produced by said ammonia absorption refrigeration process is used for cooling at least one stream of the ammonia synthesis process obtaining a first cooled stream.
Absstract of: US20260327815A1
0000 A system for producing syngas from an industrial CO<2>-containing gas stream includes a CO<2 >capture system (CCS) integrated with an electrochemical conversion system (ECS). The CCS captures CO<2 >from an industrial CO<2>-containing gas stream to produce a captured CO<2 >stream. A flow system flows the captured CO<2 >stream to the electrochemical conversion system. A membrane contactor of the CCS is configured to facilitate transfer of CO<2 >from the industrial CO<2>-containing gas stream and to an aqueous capture solution stream to produce a captured CO<2 >stream. An electrochemical cell of the electrochemical conversion system has a cathode inlet and outlet. The cathode inlet receives the captured CO<2 >stream from the flow system and the cathode outlet outputs syngas generated from the electrolysis of water and CO<2 >reduction by a cathode of the electrochemical cell.
Absstract of: WO2026220900A1
An ammonia decomposition catalyst according to the present invention comprises: a carrier containing a metal oxide; and elemental ruthenium, a first accelerator, and a second accelerator which are supported on the carrier. The first accelerator is at least one element selected from the group consisting of alkali metal elements and alkaline earth metal elements. The second accelerator is at least one element selected from the group consisting of elemental titanium, elemental zirconium, and elemental hafnium. The second accelerator is at least one element selected from the group consisting of elemental titanium and elemental zirconium.
Absstract of: US20260327811A1
0000 A fuel generator is provided herein. The fuel generator comprises an electrical conductor, a hollow tube electrically connected to the electrical conductor, and a rod electrically connected to the electrical conductor. The rod is positioned within the hollow tube, and the rod and the hollow tube are electrically isolated from each other. The fuel generator further comprises a fluid port operatively connected to the hollow tube, wherein the fluid port is configured to allow water to enter a space between the rod and the hollow tube. The fuel generator also comprises a chamber operatively connected to the space between the rod and the hollow tube, wherein the chamber is configured to receive gas generated within the hollow tube.
Absstract of: WO2026219979A1
The present invention refers to a process and a system for producing hydrogen involving ammonia cracking, starting with the vaporization of a liquid ammonia feed into a gaseous stream. This stream may be pre-converted into a pre-cracked gas comprising ammonia, hydrogen, and nitrogen before being cracked in a reactor with a catalyst bed to produce a process gas containing hydrogen, nitrogen, and unreacted ammonia. The process gas is cooled and separated into a hydrogen-rich stream and a hydrogen-depleted off-gas stream. The cracking preferably occurs at temperatures between 750°C to 800°C and pressures of 25-45 bar g, with unreacted ammonia limited to up to 1 vol.%. The system includes an evaporator, optional pre-converter, ammonia cracking reactor, cooling section, and separation section, facilitating the conversion of ammonia into hydrogen efficiently.
Absstract of: WO2026220656A1
This ammonia decomposition system comprises: an ammonia decomposition reactor; an absorption column; a regeneration column; a condenser that condenses a regeneration column discharge gas by cooling the same; a reflux drum that discharges a separated discharge gas obtained by separating liquid ammonia from the condensed regeneration column discharge gas and supplies the separated discharge gas to the ammonia decomposition reactor; a supply line that supplies a treatment target gas containing ammonia to the regeneration column; and a regeneration column discharge gas supply line that supplies a portion of the regeneration column discharge gas to the ammonia decomposition reactor before supplying the same to the condenser. The regeneration column can heat an absorption liquid and the treatment target gas. The regeneration column discharge gas supply line supplies a portion of the heated treatment target gas and the regeneration column discharge gas to the ammonia decomposition reactor.
Absstract of: WO2026220324A1
The present invention relates to a regenerable system for the storage of hydrogen in the solid state comprising a layered composite material comprising at least five layers, wherein the two outermost layers of the layered composite material comprise microcrystalline cellulose, the innermost layer of the layered composite material comprises at least one hydrogenated chemical compound of boron and nitrogen and between each outermost layer of the layered composite material and the innermost layer of the layered composite material there is an intermediate layer comprising a metal catalyst for hydrogenation and dehydrogenation. A method for obtaining hydrogen by means of such a system is further described.
Absstract of: AU2026202462A1
This invention provides a non-metallic electrode frame for non-metallic square atmospheric pressure alkaline electrolyzers, belonging to the field of electrolytic cell technology. The frame comprises a main body and assembly auxiliary components. The main body contains: a cathode liquid outlet main channel, cathode liquid outlet channel, cathode liquid inlet main channel, cathode liquid inlet channel, anode liquid outlet main channel, anode liquid outlet channel, anode liquid inlet main channel, and anode liquid inlet channel. The assembly auxiliary components include a first connector, a second connector, and an adjustment rod. The second connector is welded with a movable plate adjacent to its side, which is inserted into the first connector. The adjustment rod is inserted into a through hole in the movable plate, with its outer end fitted with a locking tube. The assembly auxiliary components allow flexible adjustment of the electrode frame's assembly quantity while enhancing its load-bearing capacity. This ensures the frame remains deformed-free under atmospheric pressure, effectively addressing issues such as deformation caused by pressure or assembly stress, which may compromise sealing performance and hinder stacking assembly. ar a r a r
Absstract of: US20260326032A1
0000 A hydrogen purification system includes at least one controller configured to receive a first outlet signal and a second outlet signal and determine an outlet moisture content based on the first outlet signal and the second outlet signal. The controller is configured to receive an inlet signal and determine an inlet hydrogen mixture temperature based on the inlet signal and determine, using a conversion efficiency lookup table, a conversion efficiency of a deoxidizer based on the inlet hydrogen mixture temperature. The controller is further configured to determine a first amount of moisture stored in a dryer based on an outlet moisture content and the conversion efficiency, and after determining that the first amount of moisture is greater than or equal to a threshold, cause a heater to provide heat to the first amount of moisture.
Absstract of: WO2026221518A1
The present invention relates to the development of a new catalyst and system for producing green hydrogen directly from seawater, without requiring seawater desalination, using alkaline electrolysis. The invention is based on hydrazine-enhanced seawater electrolysis for green hydrogen production, using a highly efficient catalyst composed of palladium and nickel hydroxide (Pd-Ni(OH)2). The technology is aimed at overcoming the challenges of conventional seawater electrolysis, such as molecular chlorine formation and electrochemical erosion, using low concentrations of liquid hydrazine as a chemical reaction aid to reduce the potential difference required at the electrode. Nanometric Pd-Ni(OH)2 is prepared, and a low concentration of liquid hydrazine is used. This hybrid system delivers an electric current of 1.1 A at a low voltage of 0.9 V, i.e. electricity use for hydrogen production is reduced by 60% and hydrogen production efficiency is increased by 50% in comparison with a commercial electrolyser that uses pure water. In addition, a very low potential difference of -1225 mA/cm-2 is achieved, thereby preventing chlorine gas formation, which usually occurs at 490 mA/cm-2.
Absstract of: US20260327813A1
A method for producing syngas from an industrial CO2-containing gas stream involves directing the gas stream and an aqueous capture solution stream to a membrane contactor to facilitate CO2 transfer, producing a CO2-lean gas stream and a CO2-rich solution stream. The CO2-rich solution stream is then directed to an electrochemical cell where CO2 is reduced to CO and water is electrolyzed to produce H2 and O2, resulting in syngas (CO and H2) and a CO2-lean aqueous capture solution stream.
Absstract of: US20260327825A1
The present disclosure relates generally to electrochemical systems for syngas production, and more particularly to a bipolar membrane electrode assembly configured to produce syngas by coupling bicarbonate electrolysis at a cathode with aldehyde oxidation at an anode. An electrochemical system for producing syngas includes a cathode configured to receive a carbon dioxide-containing feedstock and to electrochemically reduce carbon dioxide to produce carbon monoxide. The system includes an anode configured to receive an organic compound and to electrochemically oxidize the organic compound to produce hydrogen gas. The system includes a bipolar membrane positioned between the cathode and the anode, the bipolar membrane configured to facilitate water dissociation and ion transport between the cathode and the anode. The carbon monoxide produced at the cathode and the hydrogen gas produced at the anode combine to form syngas.
Absstract of: AU2025236715A1
The invention relates to a catalyst for the hydrogen evolution reaction (HER) and methods for using the catalyst in a water-splitting process. A hydrogen evolution reaction (HER) electrocatalyst, and a method and use for preparing a HER electrocatalyst are disclosed. The method comprises the step of forming a two-dimensional electron gas (2DEG) interface at a heterojunction of at least one of two or more alternating layers of a first complex oxide and a second complex oxide, wherein the or each 2DEG interface exhibits a current density, corresponding to an intrinsic hydrogen evolution reaction (HER) activity that renders the 2DEG interface(s) suitable as an HER electrocatalyst for producing hydrogen (H2) from a water-based electrolyte by water electrolysis.
Absstract of: WO2026219975A1
A method for production of pressurised hydrogen, the method comprising: providing a catalyst for conversion of ammonia to hydrogen and nitrogen; contacting a pressurised reaction stream comprising ammonia with the catalyst to convert at least a portion of the ammonia into hydrogen in a reaction zone; and obtaining a hydrogen product stream comprising pressurised hydrogen by selectively driving hydrogen from the reaction zone through a hydrogen-selective membrane under a pressure differential between a reaction-side pressure of the reaction stream and a product-side pressure of the hydrogen product stream; wherein the product-side pressure is at least 30 bar a.; and apparatus therefor.
Absstract of: WO2026219266A1
Provided are a ruthenium atomic cluster composite catalyst for hydrogen production by means of ammonia decomposition, and a preparation method therefor. The preparation method comprises: dispersing tripolycyanamide, cyanuric acid and an amino acid in an aqueous solution of methanol, and stirring same to form a mixed system; adding a rare earth metal precursor salt to the mixed system, continuously stirring same, heating same to evaporate the solvent, grinding a resulting white solid into powder, and transferring same to a high-temperature environment for pyrolysis, so as to obtain a nitrogen-rich carbon support that has been modified by a rare earth element; and dissolving a ruthenium precursor salt and urea in deionized water to form an impregnation solution, adding the nitrogen-rich carbon support that has been modified by a rare earth element to the impregnation solution, performing impregnation under stirring, and washing, drying and roasting a solid collected from filtration, so as to obtain a catalyst. In the present invention, on the basis of the characteristic of a high specific surface area of the nitrogen-rich carbon support and the modification of the electronic state of active sites, i.e., ruthenium atomic clusters, with rare earth elements, the amount of ruthenium is reduced, and NH3 adsorption performance and N-H bond cleavage capability are improved, thereby achieving efficient catalytic promotion of ammonia decomposition for hydrogen production under low-tempe
Absstract of: US20260327810A1
0000 The invention pertains to an electrolyzer designed for water splitting into hydrogen and oxygen using electric current. It consists of multiple electrolysis cells grouped into stacks, each featuring a proton-permeable polymer membrane with electrodes on both sides. Water is supplied to the anode chamber, and generated oxygen is discharged from it, while hydrogen is discharged from the cathode chamber. A control system manages the operation of the electrolysis stacks, ensuring safe operation by maintaining a higher pressure in the anode chamber compared to the cathode chamber. The anode chamber pressure is set to be 2 to 20 times, preferably 4 to 7 times, higher than the cathode chamber pressure. This design minimizes the negative effects of membrane damage during operation. The system also allows for water circulation in both chambers and includes a recombination catalyst in the hydrogen product line to recombine hydrogen and oxygen into water.
Absstract of: US20260327816A1
0000 The invention provides an electrolytic cell, comprising: a working electrode; a counter electrode; a liquid electrolyte in contact with a working surface of the working electrode; an acoustically transmissive substrate comprising at least a piezoelectric substrate portion; one or more conductive electrodes coupled to the piezoelectric substrate portion and configured to propagate a high frequency acoustic wave having a frequency of at least 1 MHz across the acoustically transmissive substrate when electrically actuated; and one or more power supplies configured (i) to apply a potential between the working electrode and the counter electrode sufficient to electrolytically react a species in the liquid electrolyte, thereby producing an electrolytic reaction product proximate the working electrode, and (ii) to electrically actuate the one or more conductive electrodes, wherein the working electrode is either located on the acoustically transmissive substrate or spaced apart from the acoustically transmissive substrate by the liquid electrolyte, and wherein propagation of the high frequency acoustic wave across the acoustically transmissive substrate in operation of the electrolytic cell stimulates the liquid electrolyte, thereby increasing the production efficiency of the electrolytic reaction product.
Absstract of: WO2026218370A1
The present invention belongs to the technical field of the preparation of catalytic materials. Disclosed is a mixed molten salt method for the rapid preparation of short-range ordered iridium oxide for PEM water electrolysis. The method can achieve the preparation of short-range ordered iridium oxide within 20 minutes to 2 hours. A high-melting-point mixed molten salt is introduced as a reaction medium to promote the uniform dispersion of an iridium salt, thereby effectively reducing agglomeration and improving the preparation efficiency; a morphology control template is not needed, thereby simplifying the process and reducing costs; and by adjusting reaction parameters, the morphology and size of iridium oxide can be flexibly regulated and controlled, the particle size of a single nanograin is 1.7-2.7 nm, and a short-range ordered structure is formed. The short-range ordered iridium oxide provides more active sites, has improved structural stability and good dispersity, can be directly used as a catalyst slurry, and achieves high catalytic activity with ultralow loading. When the short-range ordered iridium oxide is applied to anode catalytic materials for hydrogen production by means of proton exchange membrane water electrolysis, the catalyst cost is reduced, the energy conversion efficiency is improved, and an electrolyzer can reach a high current density under a low voltage and exhibit stable performance, which help to promote the development of green hydrogen economy.
Absstract of: US20260327830A1
An electrolysis device of the present disclosure includes an electrolytic cell, an electrolyte supply unit, and an ion concentration adjustment unit. The electrolytic cell includes an anode chamber, a cathode chamber, and an ion exchange membrane disposed between the anode chamber and the cathode chamber. The electrolyte supply unit includes at least one tank accommodating an electrolyte, circulates a portion of the electrolyte as a first electrolyte between the at least one tank and the anode chamber, and circulates another portion of the electrolyte as a second electrolyte between the at least one tank and the cathode chamber. The ion concentration adjustment unit supplies an adjustment solution for adjusting a hydrogen ion concentration to the electrolyte supply unit.
Absstract of: US20260327817A1
0000 Described herein are membrane assemblies for use in generating hydrogen and oxygen. The membrane assemblies include a cation exchange membrane, an anion exchange membrane, and a hydrophilic layer disposed between the anion exchange membrane and the cation exchange membrane.
Absstract of: US20260328261A1
0000 A renewable energy generation system includes a drive motor, a flywheel in mechanical communication with the drive motor, a generator in mechanical communication with the flywheel, a charge controller in electrical communication with the generator, a plurality of charge controller switches in electrical communication with the charge controller, a plurality of batteries in electrical communication with a respective charge controller switch, and a power management module in electrical communication with the plurality of charge controller switches. The drive motor effectuates rotation of the flywheel to generate stored rotational energy which is transferred to the generator as a load is placed upon the generator to maintain a constant speed of the drive motor. The power management module selectively opens or closes a charge controller switch to permit or inhibit the flow of electrical energy to a respective battery to reduce the electrical load placed upon the generator and drive motor.
Absstract of: US20260327827A1
0000 In a gas pressure balance method in an electrolyser system a predefined pressure difference between pressures in an oxygen gas separation tank and a hydrogen gas separation tank is maintained by controlled release of gases through an oxygen back pressure valve and a hydrogen back pressure valve. in a first step, for each of the oxygen back pressure valves and the hydrogen back pressure valves, a predefined, calibrated pilot gas pressure is generated and in a second step, the predefined, calibrated pilot gas pressures are forwarded to the respective back pressure valves and in a third step, hydrogen and oxygen gasses are released whenever the gas pressures in the hydrogen and oxygen separation tanks exceeds the predefined, calibrated pilot pressure in the respective pilot gas streams.
Absstract of: US20260327746A1
A method of recycling a waste catalyst coated membrane, wherein the waste catalyst coated membrane comprises a membrane including a membrane ionomer, a first catalyst layer disposed on one side of the membrane, the first catalyst layer comprising a first catalyst and a first catalyst layer ionomer, and a second catalyst layer disposed on an opposite side of the membrane, the second catalyst layer comprising a second catalyst and a second catalyst layer ionomer. The method is configured to recover the first and second catalyst layer ionomers in addition to the catalyst materials and membrane ionomer.
Absstract of: US20260327812A1
0000 A water electrolysis system includes a plurality of water electrolysis stacks connected in series to a DC power supply, a plurality of gas storage tanks (e.g., a hydrogen gas tank, a low-pressure hydrogen gas tank) for storing a gas generated in the water electrolysis stacks, a first gas pressure adjustment mechanism (e.g., a hydrogen gas tank pressure adjustment valve) for adjusting pressure of the gas generated in the entire plurality of water electrolysis stacks, a plurality of second gas pressure adjustment mechanisms (e.g., a water electrolysis stack hydrogen gas pressure adjustment valve, a water electrolysis stack low-pressure hydrogen gas pressure adjustment valve) for adjusting pressure of a gas generated in each of the water electrolysis stacks, and a control device for controlling the first gas pressure adjustment mechanism and the second gas pressure adjustment mechanism.
Nº publicación: US20260327829A1 22/10/2026
Applicant:
HITACHI LTD [JP]
Hitachi, Ltd.
Absstract of: US20260327829A1
0000 A serially connected stack group is configured by serially connecting a plurality of water electrolysis stacks and at least one overcurrent interruption means, a series-parallel stack unit is configured by parallelly connecting at least three serially connected stack groups, and a water electrolysis stack group configured by serially connecting a plurality of the series-parallel stack units, is connected to a DC power supply.
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