Process for the removal of nitrogen oxides and soot from exhaust gases of machines and combustion installations burning heavy fuel oil

US4720376A · kind A · utility

Assignees

• Didier Engineering GmbH · DE
• Didier-Werke AG · DE

Inventors

• Karl H. Laue
• Claus Flockenhaus · Essen, DE
• Erich Hackler · Essen, DE
• Blagoje Levkov · Wiesbaden, DE
• Daniel Grimm · Schlangenbad, DE
• Hartmut Kainer · Wiesbaden, DE
• Hermann Stein · Taunusstein, DE
• Hans-Eugen Buhler · Königstein, DE

Key dates

• Filing date: May 6, 1986
• Grant date: Jan 19, 1988
• Expiry date: May 6, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the removal of nitrogen oxides and soot from exhaust gases from machines and combustion installations burning heavy fuel oil by means of free-passage catalysts at increased temperatures with the addition of ammonia into the exhaust gas stream ahead of the catalysts. To make the process mre effective, the soot adhering to the catalyst surfaces is removed by burning it off and/or by friction resulting from the admixture of sand, ash or similar abrasive mixtures into the exhaust gas stream ahead of the catalysts.