Catalyst compositions, manufacture and use

Details Catalyst compositions, manufacture and use Catalyst compositions, manufacture and use

B - Operations, Transporting

01

J

252/45, 252/63

B01J 23/64 (2006.01) B01D 53/94 (2006.01) B01J 21/04 (2006.01) B01J 23/656 (2006.01) B01J 23/89 (2006.01)

Patent

CA 1116585

Abstract of the Disclosure Catalysts are disclosed which have good activity and life when used to promote the conversion of hydrocarbons, carbon monoxide and nitrogen oxides contained in small concen- trations in gaseous streams, to obtain the less noxious ma- terials, carbon dioxide, water and nitrogen. The catalysts contain a catalytically-promoting, platinum group metal com- ponent, a catalytically-promoting, base metal component and an alumina support component, deposited on a high surface area, particulate, macrosize carrier. The base metal component con- tains a metal selected from the group consisting of metals having an atomic number from 25 to 28 and rhenium. The plati- num group metal, base metal and alumina components are prefer- ably composited before deposition on the high surface area, particulate, macrosize carrier. The catalytically-promoting metal components and alumina support can be comminuted as a slurry, and the liquid medium of the slurry is preferably acidic. The high surface area, particulate, macrosize carrier, bearing the catalytic components may be dried and, if desired, calcined. The catalysts may contain platinum or palladium, especially platinum, and preferably, one or more of rhodium, ruthenium and iridium. especially rhodium, in order to promote adequately the simultaneous conversion of hydrocarbons, carbon monoxide and nitrogen oxides to less noxious materials.

311203

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