Method and installation for combined production of hydrogen and carbon dioxide

US8021464B2 · kind B2 · utility

Assignee

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

Inventors

• Pierre Gauthier · Fresnes, FR
• Bernd Polster · Frankfurt am Main, DE
• Pascal Marty · Bry-sur-Marne, FR

Key dates

• Filing date: Oct 27, 2005
• Grant date: Sep 20, 2011
• Expiry date: Feb 25, 2027

Classification

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

Abstract

The invention concerns a method for combined production of hydrogen and carbon dioxide from a mixture of hydrocarbons wherein the residual PSA is treated to produce a carbon dioxide-enriched fluid, and wherein: the residual PSA is compressed to a pressure such that the partial pressure of the CO<SUB>2</SUB> contained ranges between about 15 and 40 bar; the residue is subjected to one or more condensation/separation steps with production of CO<SUB>2</SUB>-rich condensate(s) and a purge of noncondensable gas; the purge of noncondensable gas is preferably treated to produce a H<SUB>2</SUB>-rich permeate which is recycled to the PSA, and a residue which is recycled to syngas generation, Preferably, the condensate(s) are purified by cryogenic distillation to produce food grade CO<SUB>2</SUB>. The invention also concerns an installation for implementing the method.