Process and device for decomposing laughing gas

US8480985B2 · kind B2 · utility

Assignee

• Linde GmbH · DE

Inventors

• Ulrike Wenning · Pullach, DE
• Hans-Jörg Zander · Birkenfeld, DE
• Anton Wellenhofer · Hersbruck, DE
• Karl Hofmann · Neckarrems, DE
• Wibke Korn · Munich, DE
• Franz Beran · Munich, DE
• Nicole Schodel · Birkenfeld, DE
• Wolfgang Schmehl · Hamburg, DE

Key dates

• Filing date: Jan 5, 2010
• Grant date: Jul 9, 2013
• Expiry date: Jan 5, 2030

Classification

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

Abstract

A method and device for the catalytic decomposition of laughing gas in a laughing-gas-bearing gas. The method includes diluting the laughing-gas-bearing gas with a diluting gas, while forming a laughing-gas-bearing charge gas. The laughing-gas bearing charge gas is passed through a heat-exchange step where heat exchange occurs with an exhaust. A heating step occurs for occasional heating of the laughing-gas-bearing charge gas in a fixed-bed reactor for catalytic decomposition of the laughing gas. In some embodiments the diluting gas is dried, and at least a part of the exhaust from the catalytic decomposition of the laughing gas is mixed with the laughing-gas-bearing charge gas upstream of the catalytic decomposition of the laughing gas.