Method for the production of hydrogen combined with carbon dioxide capture

US8852456B2 · kind B2 · utility

Assignee

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

Inventors

• Solene Valentin · Meudon, FR
• Paul Terrien · Newton, US
• Pascal Tromeur · Cercottes, FR

Key dates

• Filing date: Dec 2, 2010
• Grant date: Oct 7, 2014
• Expiry date: May 17, 2031

Classification

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

Abstract

The present invention relates to a method for the combined production of hydrogen and carbon dioxide from a hydrocarbon mixture, in which the hydrocarbon mixture is reformed to produce a syngas which is cooled, then enriched with H2 and CO2, optionally dried, and treated in a PSA hydrogen purification unit to produce hydrogen, the PSA offgas being treated to capture the CO2 and to supply an offgas. This offgas is again treated to supply a stream enriched with H2 and CO2 which is returned to the PSA, where it constitutes a second feed distinct from the main feed.