Method for producing hydrogen by reforming hydrocarbons using steam, combined with carbon dioxide capture and steam production

US9550671B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Arthur Darde · Paris, FR
• Mathieu LECLERC · Paris, FR
• Thomas Morel · Düsseldorf, DE

Key dates

• Filing date: Oct 31, 2013
• Grant date: Jan 24, 2017
• Expiry date: Oct 31, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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 syngas; the syngas is then cooled, and enriched with H2 and CO2; and then cooled. The condensates of the method are separated from the syngas in order to be used in the method, the saturated syngas 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 unit. The condensates from the cooling of the syngas 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 also produces CPU condensates that are recycled to be treated jointly with the condensates of the method.