Patent ID: 8460630

Claim:
A method for producing hydrogen and recovering carbon dioxide which method produces hydrogen from a carbon-containing fuel and recovers carbon dioxide, the method comprising the combination of steps of: a hydrogen-containing gas producing step of obtaining a hydrogen-containing gas that contains hydrogen and carbon dioxide by reforming a carbon-containing fuel; a PSA step of separating the hydrogen-containing gas with the use of a pressure swing adsorption apparatus into a first hydrogen-enriched gas that is a gas enriched in hydrogen and a PSA offgas that is a gas enriched in the components other than hydrogen; a carbon dioxide membrane-separating step of separating the PSA offgas with the use of a carbon dioxide separation membrane into a carbon dioxide-enriched gas that is a gas enriched in carbon dioxide and a carbon dioxide separation membrane offgas that is a gas enriched in the components other than carbon dioxide; a hydrogen membrane-separating step of separating the carbon dioxide separation membrane offgas with the use of a hydrogen separation membrane into a second hydrogen-enriched gas that is a gas enriched in hydrogen and a hydrogen separation membrane offgas that is a gas enriched in the components other than hydrogen; and a step of obtaining liquefied carbon dioxide by liquefying the carbon dioxide-enriched gas.