Process and device for removing soot from the exhaust gas of a diesel engine

US6516611B1 · kind B1 · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Adolf Schafer-Sindlinger · Frankfurt, DE
• Wolfgang Strehlau · Großkrotzenburg, DE
• Egbert Lox · Hanau, DE
• Thomas Kreuzer · Karben, DE
• Ulrich Göbel · Hattersheim, DE

Key dates

• Filing date: May 22, 2000
• Grant date: Feb 11, 2003
• Expiry date: May 22, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for removing soot from the exhaust gas of a diesel engine by oxidizing the nitrogen monoxide present in the exhaust gas to nitrogen dioxide, separating the soot from the exhaust gas stream and oxidizing the soot using the nitrogen dioxide produced. The process is performed in at least two consecutive process stages and the soot is separated from the exhaust gas stream with an efficiency W between 0.05 and 0.95 in each process stage, wherein each process stage can be assigned a transmission for soot in accordance with T=1−W and the total transmission of the process for soot is given as the product of the transmissions of all the process stages.