| 摘要 |
The present invention concerns a method for producing hydrogen by reforming hydrocarbons using steam, combined with carbon dioxide capture and steam production, which involves mixing the hydrocarbons to be reformed with steam in order to produce the feedstock for the reforming, generating a synthesis gas (essentially H2, CO, but also CO2, excess steam, residual CH4 and impurities); the synthesis gas produced is cooled, and enriched with H2 and CO2 by converting CO with steam; the enriched synthesis gas is cooled, the condensates of the method are separated from the synthesis gas in order to be used in the method, the saturated synthesis gas being treated by adsorption with pressure modulation so as to produce hydrogen and a gaseous effluent containing CO2 that is captured in a CO2-purifying CPU unit. The condensates from the cooling of the synthesis gas at the outlet of the shift reactor are used in the method for producing highly pure steam supplying the mixing point and for exportation; the CPU unit also produces CPU condensates that are recycled to be treated jointly with the condensates of the method. |
