Diesel oxidation catalyst composites

US8568674B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Shiang Sung · New York, US
• Stanley A. Roth · Yardley, US
• Claudia Wendt · Hannover, DE
• Susanne Stiebels · Adenbüttel, DE
• Helke Doering · Aurich, DE

Key dates

• Filing date: Aug 10, 2012
• Grant date: Oct 29, 2013
• Expiry date: Aug 10, 2032

Classification

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

Abstract

Oxidation catalyst composites for the treatment of exhaust gas emissions, such as the abatement of unburned hydrocarbons (HC), and carbon monoxide (CO) and the oxidation of NO to NO2 are disclosed The catalyst composites comprise two washcoat layers containing two different compositions of platinum group metals to optimize the NO2 exiting the catalyst composite. The key to improvement in NO oxidation is to have one catalyst layer that contains Pt while being substantially free of Pd. Methods and systems utilizing the catalyst composites are also disclosed.