Basf Corporation

Basf Se Corporation

Helke Doering

Stanley Allen Roth

Shiang Sung

Patrick L Burk

Torsten Neubauer

Wen-Mei Xue

Susanne Stiebels

Chung-Zong Wan

Marcus Hilgendorff

Gerd Grubert

Xiaolai Zheng

Alfred Helmut Punke

Torsten W Müller-Stach

Claudia Wendt

A diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) is described. More particularly, the present invention is directed to a washcoat composition comprising high silica to alumina zeolite and platinum and palladium such that the zeolite minimizes negative interactions of these platinum group metals with the zeolite.

Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function

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 NOare disclosed The catalyst composites comprise two washcoat layers containing two different compositions of platinum group metals to optimize the NOexiting 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.

Diesel oxidation catalyst composites

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Shanghai, China

Helke Doering