Process for the purification of crude gases with simultaneous production of synthesis gas and fuel gas

US4938783A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Gerhard Ranke · Pöcking, DE
• Horst Weiss · Karlsruhe, DE

Key dates

• Filing date: May 13, 1988
• Grant date: Jul 3, 1990
• Expiry date: May 13, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the purification of coal gasification gases, synthesis gas and fuel gas are simultaneously produced. In order to obtain a fuel gas rich in CO.sub.2, capable of handling fluctuations in demand, and to produce at the same time a highly concentrated H.sub.2 S fluid fraction, a portion of the crude gas, scrubbed to synthesis gas purity, is utilized for stripping out CO.sub.2 under pressure from scrubbing medium loaded exclusively with CO.sub.2. The partially stripped CO.sub.2 -loaded scrubbing medium is employed for the concentration of sulfur compounds in an H.sub.2 S/COS-loaded scrubbing medium.