Diesel oxidation catalyst with layer structure for improved hydrocarbon conversion

US8252258B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Torsten W. Müller-Stach · Hannover, DE
• Torsten Neubauer · Langenhagen, DE
• Alfred Punke · Walle, DE
• Gerd Grubert · Hannover, DE
• Attilio Siani · Shanghai, CN
• Corinna Freitag · Hannover, DE

Key dates

• Filing date: Jan 13, 2010
• Grant date: Aug 28, 2012
• Expiry date: Dec 17, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2510/0682
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Provided is a diesel oxidation catalyst for the treatment of exhaust gas emissions from a diesel engine and a method for treating a diesel exhaust gas stream, the method comprising providing a diesel oxidation catalyst and contacting said diesel exhaust gas stream with said diesel oxidation catalyst for the treatment of exhaust gas emissions. More particularly, the present invention is directed to a catalyst structure comprising three distinct layers; in which layer comprises a precious metal component such as palladium is located between two hydrocarbon storage layers comprising a molecular sieve such as a zeolite.