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A PROCESS AND A PLANT FOR SYNTHESIS OF AMMONIA

Resumen de: 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.

SYSTEM FOR PERFORMING INTENSIFIED CARBON DIOXIDE CO-ELECTROLYSIS

Resumen de: 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.

METHOD FOR INTENSIFIED CARBON DIOXIDE CO-ELECTROLYSIS

Resumen de: 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.

SYSTEMS AND METHODS FOR ELECTROLYTIC SYNGAS PRODUCTION

Resumen de: 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.

AMMONIA DECOMPOSITION CATALYST, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING HYDROGEN

Resumen de: 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.

FUEL GENERATOR

Resumen de: 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.

AMMONIA CRACKING SYSTEM WITH ENHANCED ENERGY EFFICIENCY AND RELATED PROCESS

Resumen de: 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.

AMMONIA DECOMPOSITION SYSTEM

Resumen de: 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.

GAS PRESSURE BALANCE METHOD IN AN ELECTROLYSER SYSTEM AND ELECTROLYSER SYSTEM WITH A PRESSURE BALANCE VALVE SYSTEM

Resumen de: 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.

HYDROGEN PRODUCTION APPARATUS FOR PRODUCING HYDROGEN FROM AMMONIA

Resumen de: EP4825792A1

0001 A hydrogen production apparatus of the present invention comprises: an ammonia decomposition reactor for decomposing ammonia to discharge a mixed gas including hydrogen, nitrogen, and unreacted ammonia; an ammonia remover for receiving the mixed gas, adsorbing and removing the unreacted ammonia included in the mixed gas, and discharging a first product gas including hydrogen and nitrogen and a first tail gas; and a nitrogen remover for receiving the first product gas, removing nitrogen included in the first product gas, and discharging a second product gas including hydrogen and a second tail gas, wherein the second product gas discharged from the nitrogen remover is resupplied to the nitrogen remover as a purge gas and a pressurizing gas. According to the hydrogen production apparatus of the present invention, high-purity hydrogen can be continuously produced in large quantities.

水素生成装置

Resumen de: JP2026169862A

【課題】エネルギー効率を向上させる。【解決手段】水素生成装置１００は、固体炭素が収容される第１空間１２０、および、液体の水Ｗが収容される第２空間１３０が形成されている容器１１０と、容器１１０内にマイクロ波を照射する照射装置１５０と、を備え、第１空間１２０は、第１空間１２０および第２空間１３０に固体炭素および水Ｗがそれぞれ収容された収容状態で、マイクロ波が照射される位置に設けられ、第２空間１３０は、収容状態で、マイクロ波が照射されない位置に設けられる。【選択図】図１

AMMONIA DECOMPOSITION SYSTEM

Resumen de: EP4825790A1

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 byproduct.

SUPPORT, METHOD FOR MANUFACTURING SUPPORT, AND CATALYST FOR AMMONIA DECOMPOSITION CONTAINING SUPPORT

Resumen de: EP4825487A1

According to exemplary embodiments of the present invention, a support is provided. The support is a support of a catalyst for ammonia decomposition, and the amount of acid sites of the support, as measured by NH3-temperature programmed desorption (NH3-TPD), is 0.006-0.010 mmol/g. Also, according to other exemplary embodiments of the present invention, provided are a method for manufacturing the support, and a catalyst for ammonia decomposition, comprising the support.

SYSTEMS AND METHODS FOR PRODUCING HYDROGEN GAS USING FLUIDIZED-BED REACTOR

Resumen de: US20250197211A1

Chemical looping systems and methods for producing hydrogen gas are described herein that use a fluidized-bed reactor to reduce carrier particles; and a moving-bed hydrogen reactor to oxidize the reduced carrier particles and form hydrogen gas. Also possibly included as a cooler for cooling the oxidized carrier particles; and a silo for storing the oxidized carrier particles and feeding them to the fluidized-bed reactor and other components. Various configurations of these components are disclosed herein.

METHOD FOR AMMONIA RECOVERY VIA PARTIAL LIQUEFACTION FROM AN AMMONIA CRACKER USING CRYOGENIC SEPARATION

Resumen de: EP4570744A1

0001 A method for producing hydrogen using a feed stream comprising ammonia is provided. The method can include the steps of: cracking a gaseous ammonia feed in an ammonia cracker to produce a cracked gas stream comprising hydrogen, nitrogen, and unreacted ammonia; cooling the cracked gas stream to a first temperature that is sufficient for condensing at least a portion of the unreacted ammonia to form a dual phase fluid; separating the dual phase fluid in an ammonia separator to produce a liquid ammonia stream and a top gas stream comprised predominately of hydrogen and nitrogen; removing additional ammonia from the top gas stream using a front-end purification system to form a purified top gas stream; further cooling the purified top gas stream to a second temperature that is sufficient for condensing at least a portion of the nitrogen within the top gas stream to form a dual-phase stream, wherein the second temperature is colder than the first temperature; introducing the dual-phase stream to a cryogenic hydrogen separator under conditions effective for separating hydrogen and nitrogen, thereby creating a liquid nitrogen stream and a hydrogen top gas; warming and vaporizing the liquid nitrogen stream to produce a gaseous nitrogen stream; warming the hydrogen top gas to produce a gaseous hydrogen product stream; and recycling the liquid ammonia stream produced by the ammonia separator to a point upstream the ammonia cracker.

AN ELECTROLYZER WITH A MULTI-PARAMETER MEASUREMENT SYSTEM

Resumen de: EP4570950A1

The present invention relates to an electrolyzer designed for the generation of hydrogen and oxygen through water electrolysis. The electrolyzer comprises a housing structure accommodating at least one electrolytic cell, which includes an anode, a cathode, and an ion-conducting membrane. A water inlet is provided to introduce water into the electrolytic cell, and an electrical power source is operatively connected to the anode and cathode to facilitate the electrolysis process. The electrolyzer also includes separate outlets for the efficient extraction of hydrogen and oxygen generated during electrolysis. A multi-parameter optical measurement system is integrated within the electrolyzer. This system features at least one optical fiber with multiple sensing points distributed along its length, each capable of detecting various operational parameters within the electrolyzer.

METHOD AND APPARATUS FOR SEPARATING RESIDUAL AMMONIA AND WATER FROM CRACKED AMMONIA

Resumen de: EP4570743A1

A method for producing hydrogen using a feed stream comprising ammonia is provided. The method may include the steps of: cracking a gaseous ammonia feed comprising ammonia and at least 0.15% water vapor in an ammonia cracker to produce a cracked gas stream comprising hydrogen, nitrogen, unreacted ammonia, and water vapor; cooling the cracked gas stream to a separation temperature that is sufficient for condensing at least a portion of the unreacted ammonia and the water vapor to form a dual phase fluid; separating the dual phase fluid in a separator that is configured to produce an aqueous ammonia stream and a vapor stream, the vapor stream comprising predominantly of hydrogen and nitrogen; wherein the separation temperature is below 0°C.

ELECTROCHEMICAL SYSTEM FOR RUNNING IN HOT IDLING MODE

Resumen de: EP4570956A1

The invention refers to an electrochemical system (1) suitable for hot idling comprising- at least one electrochemical module (11) comprising a fuel electrode section, an oxidant electrode section, and a membrane;- at least one fluid inlet line (10) leading to the electrochemical module (11), in particular to the fuel electrode section;- at least one fluid outlet line (12) exiting the electrochemical module (11);- a gas recirculation unit (15) to recirculate a gas or gas mixture exiting the electrochemical module (11) to the fuel electrode section.The system comprises an inert gas unit (3), preferably nitrogen unit, for supplying inert gas to the at least one fluid inlet line (10). The invention refers also to a method of performing electrolysis in a hot idling mode.

ELECTROLYSIS CELL AND ELECTROLYSIS DEVICE

Resumen de: EP4826134A1

0001 An electrolysis cell includes: an ion exchange membrane; a current collector provided on a surface of the ion exchange membrane and made of a plurality of fiber formed into a sheet; a binder layer covering a surface of each of the plurality of fibers; and an electrode catalyst layer containing catalyst particles at least partially protruding from a surface of the binder layer. At least a part of the catalyst particles protrudes from the surface of the binder layer. For this reason, a surface area of exposed portions of the catalyst particles increases, so that a contact area with an electrolyte can be increased.

HYDROGEN PRODUCTION SYSTEM AND HYDROGEN PRODUCTION METHOD

Resumen de: EP4826130A1

According to exemplary embodiments of the present invention, a hydrogen production system is provided. The hydrogen production system comprises: a dry quenching facility configured to cool coke using a cooling gas; a boiler configured to receive the cooling gas from the dry quenching facility and recover heat energy of the cooling gas to produce first steam and electric power; and a water electrolysis facility configured to receive the electric power from the boiler and electrolyze second steam to produce hydrogen. According to other exemplary embodiments of the present invention, a method for producing hydrogen is provided.

アルカリ性媒体を用いる電解槽スタック

Resumen de: EP4538424A1

0001 The various embodiments of the present invention disclose an electrolyser stack, preferably water electrolyser using alkaline medium, comprising: a first end plate and a second end plate and a plurality of cells stacked in-between the first and the second end plate. Each cell comprises an anode cell frame and a cathode cell frame, each cell frame further comprises a central opening, at least one inlet channel transversing through the cell frame, and at least one inlet pathway grooved in the cell frame for connecting the inlet channel to the central opening. The inlet pathway comprises an inlet orifice characterized by a minimum cross-sectional area in the inlet pathway. The cross-sectional area of the inlet channel in the stack is greater than the sum of the cross-sectional area of the plurality of inlet orifices in the stack.

SYSTEMS AND METHODS FOR REDUCING FUEL CONSUMED IN COMBUSTION FACILITIES AND RECOVERING GENERATED CO2

Resumen de: EP4826295A1

0001 The present invention relates to a system for reducing fuel consumption and recovering CO<2>, comprising: a water electrolysis facility system for producing hydrogen and oxygen from water or steam; a combustion facility for combusting fuel by using the produced oxygen; and a CO<2> recovery facility for recovering CO<2> from an exhaust gas discharged from the combustion facility.

GREEN HYDROGEN, SYNTHESIS GAS WITH A REDUCED NITROGEN CONTENT, AND FLUE GAS FOR THE SYNTHESIS OF AMMONIA AND UREA

Resumen de: AU2024399298A1

The invention relates to the synthesis of urea from ammonia and carbon dioxide, wherein the hydrogen required for ammonia synthesis is obtained both by steam reforming of feed natural gas (grey hydrogen) and by electrolysis of water using electricity from renewable energy sources (green hydrogen). As the proportion of green hydrogen increases, the amount of carbon dioxide formed in the synthesis gas during steam reforming is no longer sufficient for the synthesis of urea. Therefore, flue gas, which is formed during the combustion of a fuel gas composed of fuel natural gas and combustion air and which also contains carbon dioxide, is additionally used. The oxygen formed during the electrolysis of water is introduced into the flue gas, and the modified flue gas is fed to a secondary reformer; and/or the fuel natural gas is combusted together with combustion air and the oxygen formed during electrolysis. Excess nitrogen is preferably separated from the synthesis gas before it is used for the synthesis of ammonia.

GREEN HYDROGEN, SYNTHESIS GAS, AND FLUE GAS WITH A REDUCED NITROGEN CONTENT FOR THE SYNTHESIS OF AMMONIA AND UREA

Resumen de: WO2025125180A1

The invention relates to the synthesis of urea from ammonia and carbon dioxide, wherein the hydrogen required for ammonia synthesis is obtained both by steam reforming of feed natural gas (grey hydrogen) and by electrolysis of water using electricity from renewable energy sources (green hydrogen). As the proportion of green hydrogen increases, the amount of carbon dioxide formed in the synthesis gas during steam reforming is no longer sufficient for the synthesis of urea. Therefore, flue gas, which is formed during the firing of the steam reformer and also contains carbon dioxide, is additionally used. After reducing the nitrogen content, the flue gas is fed into the reforming process. The carbon dioxide from the synthesis gas and the flue gas is combined, separated using conventional carbon dioxide scrubbing, and used for the synthesis of urea.

ALKALINE ELECTROLYSER AND A METHOD FOR ITS OPERATION INCLUDING GAS PURGING

Nº publicación: EP4824327A1 21/10/2026

Solicitante:

STIESDAHL HYDROGEN AS [DK]
Stiesdahl Hydrogen A/S

Resumen de: WO2025124674A1

Alkaline electrolyser and a method for its operation including gas purging An alkaline electrolyser comprising a stack (17) of electrolytic cells (1) is used for producing hydrogen gas (8). Purified hydrogen gas and purified oxygen gas is used for purging the corresponding cathode and anode compartments (5, 6) for preventing buildup of dangerous gas mixtures by gas crossover during stop, before starting, or when running production low.