Basf Corporation

Engelhard Corporation

Englehard Corporation

John R Adomaitis

Michel Deeba

Robert J Farrauto

Kenneth Edwin Voss

Bulent O Yavuz

Pascaline Tran

Ye Liu

Michael P Galligan

Xinsheng Liu

Qinglin Zhang

Shau-Lin Frank Chen

Weiliang Feng

Michelle Casper

Aspects of the invention pertain to catalytic articles and methods of making catalytic articles comprising a first catalytic coating comprising a platinum group metal, wherein the first catalytic coating is substantially free of Cu, Ni, Fe, Mn, V, Co, Ga, Mo, Mg, Cr and Zn; a second catalytic coating comprising a non-PGM metal, wherein the second catalytic coating is substantially free of any platinum group metal; and one or more substrates, wherein the first catalytic coating is separated from the second catalytic coating, optionally with a barrier layer.

Catalytic articles containing platinum group metals and non-platinum group metals and methods of making and using same

Oxidation catalyst compositions for treating diesel exhaust include ceria and, optionally, alumina, each having a surface area of at least about 10 m,/g, and a zeolite, e.g., Beta zeolite. Optionally, platinum may be included in the catalytic material, preferably in amounts which are sufficient to promote some gas-phase oxidation of carbon monoxide (&ldquo;CO&rdquo;) and hydrocarbons (&ldquo;HC&rdquo;) but which are limited to preclude excessive oxidation of SO,to SO,. Alternatively, palladium in any desired amount may be included in the catalytic material. The zeolite is optionally doped, e.g., ion-exchanged, with one or more of hydrogen, a platinum group metal or other catalytic metals. The catalyst compositions may be used in a method to treat diesel engine exhaust by contacting the hot exhaust with the catalyst composition to promote the oxidation of gas-phase CO and HC and of the volatile organic fraction component of particulates in the exhaust.

Zeolite-containing oxidation catalyst and method of use

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Old Bridge, NJ, United States of America

John R Adomaitis