Abstract

The installation (102) comprises: - a combustion device (4), - at least one spacer frame (32) carrying the device, and - an electrolyser (40) configured to supply the device with hydrogen and/or oxygen and housed in the spacer frame.

IPC Classes  ?

• F24D 18/00 - Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
• F24H 9/14 - Arrangements for connecting different sections, e.g. in water heaters
• F24D 101/30 - Fuel cells

Abstract

The invention concerns a system for energy and environmental optimisation of a facility comprising at least one combustion apparatus (1) with a burner (3). The system comprises an electrolyser (2) and an injection system (4) connected to at least one fuel (3a) and/or oxidant (3b) inlet of the burner (3). The injection system is capable of injecting, at such an inlet, gases from the electrolyser (2) and/or a mixture of these gases and a combustible fluid and/or an oxidising fluid. The electrolyser (2) and/or the injection system (2) are controlled on the basis of at least one piece of information originating from the combustion apparatus (1) and/or sensors (6x) of the installation. The electrolyser can comprise a heat exchanger (2a) for cooling the device and/or preheating the water (EP) that is intended to then be heated (EC) by the combustion apparatus (1).

IPC Classes  ?

• F23D 14/32 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air
• C25B 1/04 - Hydrogen or oxygen by electrolysis of water
• C25B 15/02 - Process control or regulation
• F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
• F23N 1/02 - Regulating fuel supply conjointly with air supply
• F24D 3/00 - Hot-water central heating systems

Abstract

The invention relates to a system for treating hydrogen and/or oxygen gas produced by water electrolysis and serving to supply a combustion process, characterised in that it comprises at least one heat exchanger, in which the one or more gases circulate so as to be cooled or heated, said heat exchanger being submerged in a reactive compound through which the one or more gasses pass in turn.

IPC Classes  ?

• C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 46/54 - Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
• B01D 47/02 - Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
• B23K 3/04 - Heating appliances
• C25B 1/04 - Hydrogen or oxygen by electrolysis of water
• F23K 5/00 - Feeding or distributing other fuel to combustion apparatus

Abstract

The invention concerns a system for energy and environmental optimisation of a facility comprising at least one combustion apparatus (1) with a burner (3). The system comprises an electrolyser (2) and an injection system (4) connected to at least one fuel (3a) and/or oxidant (3b) inlet of the burner (3). The injection system is capable of injecting, at such an inlet, gases from the electrolyser (2) and/or a mixture of these gases and a combustible fluid and/or an oxidising fluid. The electrolyser (2) and/or the injection system (2) are controlled on the basis of at least one piece of information originating from the combustion apparatus (1) and/or sensors (6x) of the installation. The electrolyser can comprise a heat exchanger (2a) for cooling the device and/or preheating the water (EP) that is intended to then be heated (EC) by the combustion apparatus (1).

IPC Classes  ?

• F23D 14/32 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air
• F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
• F24D 3/00 - Hot-water central heating systems
• F23N 1/02 - Regulating fuel supply conjointly with air supply

Abstract

The invention concerns a system for energy and environmental optimisation of a facility comprising at least one combustion apparatus (1) with a burner (3). The system comprises an electrolyser (2) and an injection system (4) connected to at least one fuel (3a) and/or oxidant (3b) inlet of the burner (3). The injection system is capable of injecting, at such an inlet, gases from the electrolyser (2) and/or a mixture of these gases and a combustible fluid and/or an oxidising fluid. The electrolyser (2) and/or the injection system (2) are controlled on the basis of at least one piece of information originating from the combustion apparatus (1) and/or sensors (6x) of the installation. The electrolyser can comprise a heat exchanger (2a) for cooling the device and/or preheating the water (EP) that is intended to then be heated (EC) by the combustion apparatus (1).

IPC Classes  ?

• F23D 14/32 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air
• F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
• F23N 1/02 - Regulating fuel supply conjointly with air supply

Goods & Services

Machines and machine tools; electric generators; fuel-dispensing pumps for service stations; apparatus and machines for the production, distribution or storage of solid or gaseous hydrogen; parts of hydrogen storage generator or machine; power production installations and equipment (machines); systems and subsystems for the production or storage of energy, especially in the form of hydrogen (machines); cutters (machines); gas-operated welding and soldering apparatus and accessories included in this class, in particular nozzles, torches, tube bundles, powder drives, in particular tubes and pipes, radiators; mounting devices (parts of machines) for cutters; gas welding and soldering apparatus; industrial robots (machines); welding torches (gas operated); soldering torches (gas operated); cutting torches (gas operated); handling apparatus or robots; welding and cutting torches or heating torches; circulating pumps. Scientific apparatus and instruments; machine testing stations for the production or storage of hydrogen, including machine testing stations for the production or storage of industrial grade hydrogen; apparatus and instruments for transforming and accumulating electricity, especially in the form of apparatus for the production, such as an electrolyzer, or for the storage of hydrogen in solid or gaseous form; supervision software for equipment and installations for the production and distribution of energy, such as apparatus and machines for the production, distribution or storage of hydrogen in solid or gaseous form; soldering apparatus (gas and electric); electronic robot controls; electronic controls for welding, soldering and cutting apparatus; electronic temperature regulators; electronic units and circuits for controlling a boiler; temperature probes for central heating; probes and thermostats for boilers; aforementioned apparatus and installations with automatic or semi-automatic operation; parts and accessories for all the aforementioned apparatus and installations; electrolyzers; reactors for generation of hydrogen as a fuel. Equipment and installations for storage of hydrogen in solid or gaseous form; boilers for central heating and domestic hot water production; wall-mounted boilers; condensing boilers; wall-mounted condensing boilers; accessories for boilers and central heating installations namely expansion tanks, hot water tanks, heat exchangers, safety valves, burners, mixing valves, valves and sensors; convectors; flat radiators; radiators for bathrooms; heated towel rails; radiant panels; radiators; electric convectors and radiant panels; solar thermal collectors [heating]; mixers and exchangers; solar energy heating apparatus and installations; floor heating installations and apparatus; heat pumps and heating installations including the foregoing; heat treatment apparatus and installations; hydrogen generators.

Goods & Services

Machines and machine tools; electric generators; fuel-dispensing pumps for service stations; apparatus and machines for the production, distribution or storage of solid or gaseous hydrogen; parts of generator or machine for the storage of hydrogen; power production installations and equipment (machines); systems and subsystems for the production or storage of energy, especially in the form of hydrogen (machines); cutters (machines); gas soldering and welding apparatus and accessories included in this class, in particular nozzles, torches, tube bundles, powder drives, in particular tubes and pipes, radiators; mounting devices (parts of machines) for cutters; gas welding and soldering apparatus; industrial robots (machines); welding torches (gas operated); soldering torches (gas operated); cutting torches (gas operated); handling apparatus or robots; welding and cutting torches or heating torches; circulating pumps. Scientific apparatus and instruments; machine testing stations for the production or storage of hydrogen, including machine testing stations for the production or storage of industrial grade hydrogen; apparatus and instruments for transforming and accumulating electricity, especially in the form of apparatus for the production, such as an electrolyzer, or for the storage of hydrogen in solid or gaseous form; supervision software for equipment and installations for the production and distribution of energy, such as apparatus and machines for the production, distribution or storage of hydrogen in solid or gaseous form; soldering apparatus (gas and electric); electronic robot controls; electronic controls for welding, soldering and cutting apparatus; electronic temperature regulators; electronic units and circuits for controlling a boiler; temperature probes for central heating; probes and thermostats for boilers; aforementioned apparatus and installations with automatic or semi-automatic operation; electrolyzers; parts and accessories for all the aforementioned apparatus and installations. Hydrogen generators; equipment and installations for the storage of solid or gaseous hydrogen; reactors for generation of hydrogen as a fuel; boilers for central heating and domestic hot water production; wall-mounted boilers; condensing boilers; wall-mounted condensing boilers; accessories for boilers and central heating installations namely expansion tanks, hot water tanks, heat exchangers, safety valves, burners, mixing valves, valves and sensors; convectors; flat radiators; radiators for bathrooms; heated towel rails; radiant panels; radiators; electric radiant panels and convectors; solar thermal collectors (heating); mixers and exchangers; solar energy heating apparatus and installations; floor heating installations and apparatus; heat pumps and heating installations, including heat treatment apparatus and installations.

Abstract

The invention relates to a system for treating hydrogen and/or oxygen gas produced by water electrolysis and serving to supply a combustion process, characterised in that it comprises at least one heat exchanger, in which the one or more gases circulate so as to be cooled or heated, said heat exchanger being submerged in a reactive compound through which the one or more gases pass in turn.

IPC Classes  ?

• C25B 15/00 - Operating or servicing cells
• C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
• C25B 1/04 - Hydrogen or oxygen by electrolysis of water
• C01B 3/52 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquidsRegeneration of used liquids
• F02B 43/10 - Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
• F23D 14/28 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
• F23D 14/46 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid Details
• F23D 14/38 - Torches, e.g. for brazing or heating
• F23D 14/52 - Nozzles for torchesNozzles for blow-pipes
• C01B 3/56 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solidsRegeneration of used solids
• F02M 25/12 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone the apparatus having means for generating such gases

Abstract

The invention relates to a system for treating hydrogen and/or oxygen gas produced by water electrolysis and serving to supply a combustion process, characterised in that it comprises at least one heat exchanger, in which the one or more gases circulate so as to be cooled or heated, said heat exchanger being submerged in a reactive compound through which the one or more gases pass in turn.

IPC Classes  ?

• C01B 3/52 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquidsRegeneration of used liquids
• C01B 3/56 - Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solidsRegeneration of used solids
• C25B 15/00 - Operating or servicing cells
• C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
• F02B 43/10 - Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
• F02M 25/12 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone the apparatus having means for generating such gases
• F23D 14/28 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
• F23D 14/38 - Torches, e.g. for brazing or heating
• F23D 14/46 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid Details
• F23D 14/52 - Nozzles for torchesNozzles for blow-pipes

Goods & Services

(1) Chalumeaux de brasage fonctionnant au gaz; chalumeaux de soudage, à découper et de chauffe fonctionnant au gaz (2) Dispositifs de commande de robots électroniques; dispositifs de commande électroniques pour appareils de soudage, brasage et découpe; régulateurs électroniques de température pour chaudieres; circuits électroniques; organes électriques de commande à distance d'une chaudière; sondes de température pour chauffage central; thermostats pour chaudières (3) Générateurs d'hydrogène; électrolyseurs chaudières de chauffage central et de production d'eau chaude sanitaire; chaudières murales de chauffagechaudières à condensation; chaudières murales à condensation; accessoires pour chaudières et installations de chauffage central à savoir vases d'expansion, pompes de circulation, ballons d'eau chaude, échangeurs de chaleur, soupapes de sécurité, brûleurs, vannes mélangeuses, capteurs et robinets; convecteurs radiateurs électriques plats; radiateurs à gaz pour salle de bains; radiateurs électriques sèche-serviettes; panneaux radiants à gaz; radiateurs à gaz; convecteurs et panneaux radiants électriques; capteurs solaires à eau; mélangeurs de douche panneaux de chauffage solaire; capteurs solaires pour le chauffage; appareils et installations de chauffage par le sol nommément plancher rayonnant hydraulique et plancher rayonnant électrique pompes à chaleur; fournaises de traitement thermique

Goods & Services

[ Electric generators; fuel-dispensing pumps for service stations; ] apparatus and machines for the production [ , distribution or storage ] of solid [ or] gaseous hydrogen; [ component parts of a generator or machine for the storage of hydrogen; power production installations and equipment, namely, machines; systems and subsystems for the production or storage of energy, especially in the form of hydrogen, namely, machines; ] cutters, namely, machines; gas welding and soldering apparatus and accessories, namely, nozzles, torches, tube bundles, powder drives, in particular tubes and pipes; [ mounting devices being parts of cutter machines; ] gas welding and soldering apparatus; [ industrial robots, namely, machines; ] gas operated welding torches; gas operated soldering torches; gas operated cutting torches [ ; circulating pumps ] Hydrogen generators; [ equipment and installations for the storage of solid or gaseous hydrogen; nuclear and solar reactors for generation of hydrogen as a fuel; ] boilers for central heating and domestic hot water production [ ; wall-mounted electric and industrial boilers; condensing boilers; wall-mounted condensing boilers; accessories for boilers and central heating installations, namely, expansion tanks, hot water tanks, heat exchangers, safety valves, burners, mixing valves, valves and sensors; convectors; flat radiators; radiators for bathrooms; electrically heated towel rails; radiant heating panels; radiators; electric convectors and radiant panels; solar thermal collectors for heating; heat exchangers not being parts of machines; floor heating installations and apparatus; heat pumps and heating installations, including heat treatment apparatus and installations ]

Goods & Services

(1) Réservoirs métalliques pour stockage d'hydrogène solide ou gazeux (2) Générateurs électriques; distributeurs de carburants pour stations-service; distributeurs d'hydrogene pour stations-service; machines coupeuses de métal; appareils de soudage et brasage fonctionnant au gaz et leurs accessoires nommément buses, chalumeaux, faisceaux de tubes et dispositifs d'entraînement de poudre, nommément tubes et tuyaux; appareils de soudage et brasage fonctionnant au gaz; robots industriels; chalumeaux de soudage fonctionnant au gaz; chalumeaux de brasage fonctionnant au gaz; chalumeaux à découper fonctionnant au gaz (3) Appareils d'électrolyse pour la production d'hydrogène à partir de l'eau (4) Générateurs d'hydrogène; électrolyseurs; réacteurs pour génération d'hydrogène en tant que combustible; chaudières de chauffage central et de production d'eau chaude sanitaire; chaudières murales de chauffage; chaudières à condensation; chaudières murales à condensation; accessoires pour chaudières et installations de chauffage central à savoir vases d'expansion, pompes de circulation, ballons d'eau chaude, échangeurs de chaleur, soupapes de sécurité, brûleurs, vannes mélangeuses, capteurs et robinet; convecteurs; convecteurs et panneaux radiants électriques; radiateurs électriques plats; radiateurs à gaz pour salle de bains; radiateurs électriques sèche-serviettes; panneaux radiants électriques; panneaux radiants à gaz; radiateurs à gaz; convecteurs et panneaux radiants électrique; capteurs solaires à eau; mélangeurs de douche; panneaux de chauffage solaire; capteurs solaires pour le chauffage; appareils et installations de chauffage par le sol nommément plancher rayonnant électrique; pompes à chaleur; fournaises de traitement thermique

Goods & Services

Machine testing stations in the nature of fuel cells and hydrogen generators for producing and storing hydrogen and industrial grade hydrogen; apparatus and instruments for transforming and accumulating electricity from hydrogen in [ solid and ] gaseous form, namely, electrolysers, [ electric accumulators, and electrical transformers; ] downloadable operating system programs for supervising equipment and installations that produce and distribute energy derived from hydrogen in [ solid and ] gaseous form; [ electronic controls for robots; ] electronic controllers for welding, soldering and cutting apparatus; electronic controllers for controlling boiler temperature; electronic circuits and controllers for boilers; temperature probes for scientific purposes, namely, for testing central heating apparatus; thermostats for boilers and temperature probes for scientific purposes, namely, for testing boilers; electrolyzers; electrical reactors for generating hydrogen as a fuel [ Solid and ] gaseous hydrogen energy storage plants; central heating boilers and hot water heaters; wall-mounted heating boilers; gas condensing boilers, other than parts of machines; gas condensing wall-mounted boilers, other than parts of machines; accessories for boilers and central heating installations, namely, water purification expansion tanks, hot water tanks, heat exchangers not being parts of machines, reverse flow check safety valves, gas burners, thermostatic mixing valves [ , plumbing fittings, namely, valves, and flow restrictors for reverse osmosis water purification units; convector heaters; flat radiators; radiators for bathrooms; electrically heated towel rails; radiant heating panels for indoor heating purposes; radiators; electric convector heaters and radiant heating panels for indoor heating purposes; solar thermal collectors for heating; shower mixers and heat exchangers for chemical processing; solar water heaters; floor heating installations and apparatus; heat pumps and heating installations; quenching apparatus for heat treatment ] ; hydrogen generators

Goods & Services

Machine tools; Electric generators; Fuel dispensing pumps for service stations; Apparatus and machines for the production of hydrogen in solid or gaseous form; Parts of generators or machines for storing hydrogen; Energy production equipment and installations (machines); Cutters (machines); Gas-operated welding and brazing apparatus and fittings included in this class, in particular nozzles, Blow torches, Tube bundles and powder entraining apparatus, in particular tubes and Nozzles, Radiators; Mounting devices (parts of machines) for cutters; Gas-operated welding and brazing apparatus; Industrial robots (machines); Soldering blow pipes, gas-operated; Brazing blow pipes, gas-operated; Cutting blow pipes, gas-operated; Handling apparatus or robots; Brazing apparatus (gas and electric); Soldering, cutting or heating blow pipes. Scientific apparatus and instruments; Test stations for hydrogen production or storage machines, including test stations for industrial hydrogen production or storage machines; Apparatus and instruments for transforming or accumulating electricity; Computer software for monitoring equipment and installations for the production and distribution of energy, including apparatus and machines for the production, distribution or storage of hydrogen in solid or gaseous form; Electronic robot control devices; Output ports and interfaces for robots; Electronic control devices for welding, brazing and cutting apparatus; Electronic temperature regulators; Boiler control components and electronic circuits; Temperature probes for central heating; Probes and thermostats for boilers; Electrolysers; The aforesaid apparatus and installations being automatic or semi-automatic; Parts and fittings for all the aforesaid apparatus and installations. Hydrogen-powered heat generators; Equipment and installations for generating hydrogen from water and electricity in solid or gaseous form; reactors for generating hydrogen as a fuel; Boilers for central heating systems and for the production of domestic hot water; Wall-mounted boilers; Condensing boilers; Wall-mounted condensing boilers; Fittings for boilers and central heating installations, namely expansion tanks, circulating pumps, hot water boilers, heat exchangers, safety valves, burners, thermostatic valves, sensors and taps; Convectors; Flat fronted radiators; Bath heating elements; Heated towel rails; Radiant panels; Radiators; Convectors and radiant panels; Solar water heaters; Heat exchangers, other than parts of machines; Solar energy powered heating apparatus and installations; Floor heating installations and apparatus; Heat pumps and heating installations consisting thereof; Apparatus and installations for heat treatment by combustion of hydrogen produced by electrolysis. Scientific and technological services and research, design and consultancy in the field of the design and development of stations for the production, storage or distribution of hydrogen; Consultancy, research, development and testing relating to hydrogen and hydrogen products; Testing of equipment for the storage of hydrogen in solid or gaseous form; Design and testing of hydrogen generators and storage systems; designing and commissioning alternate energy systems; Providing services relating to hydrogen systems, namely scientific and technological consultancy, Engineering services, Project development.

Goods & Services

Machine tools; Electric generators; Fuel dispensing pumps for service stations; Apparatus and machines for the production of hydrogen in solid or gaseous form; Parts of generators or machines for storing hydrogen; Energy production equipment and installations (machines); Cutters (machines); Gas-operated welding and brazing apparatus and fittings included in this class, in particular nozzles, Blow torches, Tube bundles and powder entraining apparatus, in particular tubes and Nozzles, Radiators; Mounting devices (parts of machines) for cutters; Gas-operated welding and brazing apparatus; Industrial robots (machines); Soldering blow pipes, gas-operated; Brazing blow pipes, gas-operated; Cutting blow pipes, gas-operated; Handling apparatus or robots; Brazing apparatus (gas and electric); Soldering, cutting or heating blow pipes. Scientific apparatus and instruments; Test stations for hydrogen production or storage machines, including test stations for industrial hydrogen production or storage machines; Apparatus and instruments for transforming or accumulating electricity; Computer software for monitoring equipment and installations for the production and distribution of energy, including apparatus and machines for the production, distribution or storage of hydrogen in solid or gaseous form; Electronic robot control devices; Output ports and interfaces for robots; Electronic control devices for welding, brazing and cutting apparatus; Electronic temperature regulators; Boiler control components and electronic circuits; Temperature probes for central heating; Probes and thermostats for boilers; Electrolysers; The aforesaid apparatus and installations being automatic or semi-automatic; Parts and fittings for all the aforesaid apparatus and installations. Hydrogen-powered heat generators; Equipment and installations for generating hydrogen from water and electricity in solid or gaseous form; reactors for generating hydrogen as a fuel; Boilers for central heating systems and for the production of domestic hot water; Wall-mounted boilers; Condensing boilers; Wall-mounted condensing boilers; Fittings for boilers and central heating installations, namely expansion tanks, circulating pumps, hot water boilers, heat exchangers, safety valves, burners, thermostatic valves, sensors and taps; Convectors; Flat fronted radiators; Bath heating elements; Heated towel rails; Radiant panels; Radiators; Convectors and radiant panels; Solar water heaters; Heat exchangers, other than parts of machines; Solar energy powered heating apparatus and installations; Floor heating installations and apparatus; Heat pumps and heating installations consisting thereof; Apparatus and installations for heat treatment by combustion of hydrogen generated by electrolysis.

Abstract

steps a) and b) being able to be implemented simultaneously, successively or to be reversed.

IPC Classes  ?

• C25B 11/03 - ElectrodesManufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
• C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
• C25B 1/04 - Hydrogen or oxygen by electrolysis of water

Abstract

The present invention relates to an electrode for diffusing gases, which is formulated by a method using at least one electrocatalytic material in the form of a divided powder. The invention further relates to the method for formulating an electrode, to a device for the electrolysis of water that includes said electrode, and to a method for producing a hydrogen/oxygen mixture or hydrogen alone, or for producing oxygen alone.

Abstract

The present invention relates to an electrode for diffusing gases, which is formulated by a method using at least one electrocatalytic material in the form of a divided powder. The invention further relates to the method for formulating an electrode, to a device for the electrolysis of water that includes said electrode, and to a method for producing a hydrogen/oxygen mixture or hydrogen alone, or for producing oxygen alone.

IPC Classes  ?

• C25B 1/04 - Hydrogen or oxygen by electrolysis of water
• C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material