Process for recovering hydrogen and carbon dioxide from a syngas stream

US8636922B2 · kind B2 · utility

Assignee

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

Inventors

• Bhadra S. Grover · Pound Ridge, US
• Paul Terrien · Newton, US

Key dates

• Filing date: Jun 30, 2010
• Grant date: Jan 28, 2014
• Expiry date: May 18, 2031

Classification

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

Abstract

The present invention provides a process for recovering high purity gaseous hydrogen and high purity gaseous carbon dioxide from a syngas stream by utilizing a hydrogen selective membrane unit and a primary water gas shift reactor in combination with a cryogenic purification unit, a hydrogen recovery unit and a secondary water gas shift reactor or by utilizing a hydrogen membrane/water gas shift reactor in combination with a cryogenic purification unit, a hydrogen recovery unit and a secondary water gas shift reactor. Each of these embodiments may further include a sulfur recovery unit.