Michael P. Galligan

TL;DR: In this paper, a method of making the catalyst composition includes applying the undercoat to the substrate and calcining it, impregnating the overlayer refractory metal oxide with one or more catalytic metal components and depositing the overlayers over the under-coat, and calcine it.

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 monoxide

TL;DR: In this article, a method for applying a coating of catalytic material onto a metallic substrate involves thermal spray deposition of refractory oxide particles directly onto the substrate, preferably to attain an undercoat having a surface roughness of Ra 3 or greater.

TL;DR: In this article, electric arc spraying a metal onto a substrate produces an anchor layer on the substrate that serves as a surprisingly superior intermediate layer for a catalytic material deposited thereon.

TL;DR: In this paper, a catalyzed metallic substrate, such as a metal plate, is used as part of exhaust systems for small engines for applications such as motorcycles, lawn mowers, chain saws, weed trimmers and the like.