Basf Corporation

Shlang Sung

Michel Deeba

Stanley Allen Roth

Jeffrey Barmont Hoke

Yuejin Li

Torsten Neubauer

Chung-Zong Wan

Xinyi Wei

Gerd Grubert

Alfred Helmut Punke

M Shahjahan Kazi

Torsten Wolfgang Mueller-Stach

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.

Layered diesel oxidation catalyst composites

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Shlang Sung