B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/64 (2006.01) B01D 53/94 (2006.01) B01J 23/648 (2006.01) B01J 29/04 (2006.01) B01J 35/04 (2006.01) B01J 37/00 (2006.01) B01J 37/02 (2006.01) F02B 3/06 (2006.01)
Patent
CA 2094429
ABSTRACT OF THE DISCLOSURE The invention relates to an oxidative diesel control catalyst which has a high conversion rate for hydrocarbons and carbon monoxide and an inhibited oxidation effect on nitrogen oxides and sulfur dioxides and which contains a monolithic catalyst element with throughflow passages of ceramic or metal coated with an activity-promoting dispersion coating of the fine-particle metal oxides aluminium oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof as support for the catalytically active components, the active components being present in the form of platinum, palladium, rhodium and/or iridium doped with vanadium or in contact with an oxidic vanadium compound. The reduced oxidation effect on sulfur dioxide is obtained by virtue of the fact that the fine-particle metal oxides are surface-modified aluminium oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof. The surface modification comprises a coating of the specific surface of the metal oxides with a layer of titanium dioxide or silicon dioxide comprising 1 to 5 monolayers.
Domesle Rainer
Engler Bernd
Leyrer Jurgen
Lox Egbert
Aktiengesellschaft Degussa
Marks & Clerk
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