Mobile denox catalyst

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 21/06 (2006.01) B01D 53/56 (2006.01) B01D 53/94 (2006.01) B01J 23/745 (2006.01) B01J 35/10 (2006.01) B01J 37/04 (2006.01)

Patent

CA 2748316

DeNOx catalysts for the reduction of NOx compounds and porous catalyst support materials are provided. The inventive catalysts comprise an active metal catalyst component and mixed TiO2/ZrO2 porous support particles that comprise a) a crystalline phase comprising titanium dioxide and/or a titanium/zirconium mixed oxide, b) an amorphous phase comprising zirconium, and c) a small amount of one or more metal oxide(s) or metalloid oxide(s) deposited on the amorphous outer layer. The inventive catalysts exhibit superior activity and ammonia selectivity.

L'invention concerne des catalyseurs dénox servant à réduire les composés d'oxyde d'azote (Nox), et des matières de support poreux de catalyseur. Les catalyseurs de l'invention comprennent un composant de catalyseur métallique actif et des particules mixtes de support poreux de TiO2/ZrO2 qui comprennent: a) une phase cristalline comprenant du dioxyde de titane et/ou un oxyde mixte de titane/zirconium, b) une phase amorphe comprenant du zirconium et c) une faible quantité d'un ou de plusieurs oxyde(s) métallique(s) ou d'oxyde(s) métalloïde(s) déposé(s) sur la couche extérieure amorphe. Les catalyseurs de l'invention présentent une activité supérieure et une sélectivité à l'égard de l'ammoniac.

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