Method and apparatus for hydrogen production and carbon dioxide recovery

摘要

There are provided methods and apparatus allowing effective production of high purity hydrogen and recovery of carbon dioxide. There is disclosed a method of hydrogen production and carbon dioxide recovery for producing hydrogen and recovering carbon dioxide from a carbon-containing fuel, the method including a membrane separation reforming step of, with the use of a reformer provided with a hydrogen-permeable membrane, reforming the carbon-containing fuel and simultaneously separating hydrogen to obtain a hydrogen-permeable membrane permeated gas which is a gas having permeated the hydrogen-permeable membrane and a reformer off-gas which is a gas not having permeated the hydrogen-permeable membrane, and the method further comprising: with the use of a hydrogen separation membrane and a carbon dioxide separation membrane, treating the reformer off-gas to obtain a hydrogen-enriched gas and a carbon dioxide-enriched gas; or subjecting the reformer off-gas to a shift reaction and then separating the resulting gas into a carbon dioxide-enriched gas and a gas enriched in components other than carbon dioxide. Also disclosed is an apparatus for carrying out the method.