Patent
Oxidation catalyst with bulk ceria, a second bulk metal oxide, and platinum
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Abstract:
Oxidation catalyst compositions include a catalytic material having a BET surface area of at least about 10 m 2 /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 α-alumina The combination may optionally also include activated alumina having a BET surface area of at least about 10 m 2 /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 SO 2 to SO 3 The catalyst compositions may be used for oxidation of oxidizeable components in a gas-borne stream, eg, 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, eg, hydrocarbons and carbon monoxideread more
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References
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Aluminum-stabilized ceria catalyst compositions, and methods of making the same
TL;DR: In this article, a method of making the material includes impregnating bulk ceria with an aluminum compound and calcining the impregnated ceria to provide an aluminum-stabilized ceria.
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Exhaust gas cleaning catalyst and process for production thereof
TL;DR: In this paper, an exhaust gas cleaning catalyst composed of a refractory three-dimensional structure and a catalytically active substance supported thereon is presented, where the surface or part of the catalyst is formed of numerous irregularly arranged protrusions.
PatentDOI
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TL;DR: In this article, a pollution control catalyst for a catalytic converter within the exhaust system of an internal combustion engine is facilely prepared by coating/impregnating a catalyst support with palladium and at least one base metal catalyst.
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