Process for the catalytic removal of polycyclic aromatic nitro, nitroso and/or amino compounds

US6482376B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Walter Fischer · Reinach, CH
• Ronald Neufert · Aichach, DE

Key dates

• Filing date: Mar 5, 2001
• Grant date: Nov 19, 2002
• Expiry date: May 2, 2021

Classification

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

Abstract

A process is provided for the catalytic removal of polycyclic aromatic nitro, nitroso and/or amino compounds from the exhaust gas of a combustion system, in particular a diesel engine. The exhaust gas is brought into contact with a catalytic converter which includes a catalytically active material that contains titanium dioxide, at a temperature of from 150 to 600° C. The polycyclic aromatic compounds are oxidized at the catalytic converter through the use of oxygen to form nitrogen oxides, carbon dioxide and water.