Layered diesel oxidation catalyst composites

US8329607B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• M. Shahjahan Kazi · Kendall Park, US
• Michel Deeba · East Brunswick Township, US
• Torsten Neubauer · Langenhagen, DE
• Alfred Punke · Walle, DE
• Torsten Wolfgang Mueller-Stach · Hannover, DE
• Gerd Grubert · Hannover, DE
• Stanley A. Roth · Yardley, US
• Jeffrey B. Hoke · New Brunswick, US
• Shlang Sung · New York, US
• Yuejin Li · Edison, US
• Xinyi Wei · Princeton, US
• Chung-Zong Wan · Somerville, US

Key dates

• Filing date: Jan 14, 2010
• Grant date: Dec 11, 2012
• Expiry date: Jun 18, 2030

Classification

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

Abstract

Provided are diesel exhaust components where palladium is segregated from a molecular sieve, specifically a zeolite, in a catalytic material. In the catalytic material, therefore, there are at least two layers: a palladium-containing layer that is substantially free of a molecular sieve and a hydrocarbon trap layer that comprises at least one molecular sieve and is substantially free of palladium. The palladium is provided on a high surface area, porous refractory metal oxide support. The catalytic material can further comprise a platinum component, where a minor amount of the platinum component is in the hydrocarbon trap layer, and a majority amount of the platinum component is in the palladium-containing layer. Systems and methods of using the same are also provided.