Carbon monoxide conversion catalyst

US8828343B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Xinsheng Liu · Edison, US
• Ye Liu · Foster City, US
• Pascaline Tran · Holmdel, US
• Keshavaraja Alive · South Plainfield, US
• Michael P. Galligan · Cranford, US

Key dates

• Filing date: Mar 2, 2011
• Grant date: Sep 9, 2014
• Expiry date: May 11, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S502/52713
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Catalyst articles comprising palladium and related methods of preparation and use are disclosed. Disclosed is a catalyst article comprising a first catalytic layer formed on a substrate, wherein the first catalytic layer comprises palladium impregnated on a ceria-free oxygen storage component and platinum impregnated on a refractory metal oxide, and a second catalytic layer formed on the first catalytic layer comprising platinum and rhodium impregnated on a ceria-containing oxygen storage component. The palladium component of the catalyst article is present in a higher proportion relative to the other platinum group metal components. The catalyst articles provide improved conversion of carbon monoxide in exhaust gases, particularly under rich engine operating conditions.