B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/10 (2006.01) B01D 53/86 (2006.01) B01D 53/94 (2006.01) B01J 23/42 (2006.01) B01J 23/63 (2006.01) B01J 35/10 (2006.01) B01J 37/02 (2006.01) F24C 15/20 (2006.01) F02B 3/06 (2006.01) B01D 53/36 (1990.01)
Patent
CA 2124439
2124439 9310885 PCTABS00022 Oxidation catalyst compositions include a catalytic material having a BET surface area of at least about 10 m2/g and consisting essentially of a combination of bulk ceria and a bulk second metal oxide which may be one or more of titania, zirconia, ceria-zirconia, silica, alumina-silica and .alpha.-alumina. The combination may optionally also include activated alumina having a BET surface area of at least about 10 m2/g. The ceria, second metal oxide and optional activated alumina may be mixed together or provided as discrete layers. Optionally, one of platinum or palladium metal may be dispersed on the catalytic material provided that the platinum, when used, is used in limited amounts to preclude excessive oxidation of SO2 to SO3. The catalyst compositions may be used for oxidation of oxidizable components in a gas-borne stream, e.g., in a method to treat diesel engine exhaust by contacting the hot exhaust with the catalyst composition to promote the oxidation of the volatile organic fraction. The optional inclusion of platinum or palladium promotes the oxidation of gas phase components, e.g., hydrocarbons and carbon monoxide.
Farrauto Robert J.
Galligan Michael P.
Voss Kenneth E.
Yavuz Bulent O.
Sim & Mcburney
The Engelhard Corporation
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