Three-way catalyst having an upstream multi-layer catalyst

US8323599B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• John G. Nunan · Tulsa, US
• Raoul Klingmann · Alzenau, DE
• Ryan J. Andersen · Belmont, US
• Davion Onuga Clark · Auburn Hills, US
• David Moser · Sterling Heights, US

Key dates

• Filing date: Nov 22, 2010
• Grant date: Dec 4, 2012
• Expiry date: Mar 7, 2031

Classification

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

Abstract

Disclosed herein is a layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides being separated in a front and rear portion is disclosed. Provided is a catalytic material of at least two front and two rear layers in conjunction with a substrate, where each of the layers includes a support, all layers comprise a platinum group metal component, and the rear bottom layer is substantially free of a ceria-containing oxygen storage component (OSC).