Process and plant for producing hydrogen by steam reforming and high-temperature electrolysis
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorSwatantra Kumar Shrivastava
Life of this patent
Estimating the term…
Abstract
The invention relates to a process and a plant for producing hydrogen by steam reforming and high-temperature electrolysis. Steam reforming produces a synthesis gas from a carbon-containing starting material and steam. Process heat generated in the context of the steam reforming is utilized for producing steam from water. Thus-produced steam is utilized as reactant for producing an electrolysis product in a high-temperature electrolysis step, wherein the electrolysis product includes at least hydrogen and oxygen. Hydrogen is separated from the synthesis gas produced by steam reforming and from the electrolysis product produced by high-temperature electrolysis.
Claims11
A process for producing hydrogen by steam reforming and high-temperature electrolysis, comprising:
- (a) producing a synthesis gas from a carbon-containing starting material and steam by steam reforming, wherein the synthesis gas comprises at least hydrogen, carbon monoxide and carbon dioxide;
- (b) producing steam by heating water using process heat generated in step (a);
- (c) using the steam produced in step (b) as reactant in a high-temperature electrolysis step for producing an electrolysis product, wherein the electrolysis product comprises hydrogen and oxygen;
- (d) separating hydrogen from the synthesis gas obtained in step (a) and from the electrolysis product obtained in step (c),
- wherein the high-temperature electrolysis step according to step (c) employs both steam and carbon dioxide as reactants, wherein the electrolysis product comprises synthesis gas and oxygen.
Dependencies are inferred from the claim text.