Process and device for the selective catalytic reduction of nitrogen oxides in an oxygen-containing gaseous medium

US6878359B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wieland Mathes · Aichach, DE
• Raimund Müller · Erlangen, DE
• Klaus Rusch · Achberg, DE
• Petra Anette Rusch · Hermeskeil, DE
• Ralf Sigling · Alpharetta, US

Key dates

• Filing date: Nov 13, 2000
• Grant date: Apr 12, 2005
• Expiry date: Jan 14, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/8631
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The process and the device are provided for the selective catalytic reduction of nitrogen oxides in an oxygen-containing gaseous medium. The reducing agent required for the reaction is prepared in a separate preparation reactor. A substance that can be converted into the reducing agent is introduced into a carrier gas in the preparation reactor and, as a result, is converted by substantially thermal conversion. The energy required for the conversion is provided by the carrier gas.