Method for cleaning diesel engine exhaust gas

US6488903B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wieland Mathes · Aichach, DE
• Ronald Neufert · Aichach, DE
• Dietmar Weisensel · Sinzing, DE
• Klaus Wenzlawski · Wendelstein, DE

Key dates

• Filing date: Nov 29, 2000
• Grant date: Dec 3, 2002
• Expiry date: May 11, 2021

Classification

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

Abstract

A method for cleaning diesel engine exhaust gas is described. The exhaust gas is passed over a catalytic converter with an active material which contains (% by weight) 70-95% TiO2, 2-10% WO3 and/or MoO3, 0.1-5% V2O5, 0.1-8% CaO, 0.1-8% Al2O3, 0.1-5% B2O3 and 0.1-10% SiO2. A reducing agent for a reduction of nitrogen oxides is metered into the exhaust-gas stream upstream of the catalytic converter.