Method and apparatus for reducing nitrous oxide

US6649134B2 · kind B2 · utility

Assignee

• W.C. Heraeus GmbH & Co. KG · DE

Inventors

• Marek Gorywoda · Hanau, DE
• David Francis Lupton · Gelnhausen, DE
• Jonathan Lund · Kelkheim, DE

Key dates

• Filing date: Dec 17, 2001
• Grant date: Nov 18, 2003
• Expiry date: May 28, 2022

Classification

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

Abstract

A process and a device for reducing the nitrous oxide which is formed during the catalytic combustion of ammonia and oxygen to form nitrogen oxides. A catalyst system including at least one first catalyst mesh element and at least one second catalyst mesh element is used for the catalytic combustion of ammonia and oxygen to form nitrogen oxides, where the minimum of one first catalyst mesh element is a platinum-rhodium mesh and the minimum of one second, downstream catalyst mesh element is a palladium-rhodium mesh with 2-4 wt. % of rhodium.