Copper cha zeolite catalysts

Details Copper cha zeolite catalysts Copper cha zeolite catalysts

B - Operations, Transporting

01

J

B01J 29/072 (2006.01) B01D 53/00 (2006.01) B01J 29/76 (2006.01)

Patent

CA 2679590

Zeolite catalysts, systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15 : 1 to about 256 : 1 and a copper to alumina ratio from about 0.25 : 1 to about 1 : 1.

L'invention concerne des catalyseurs de zéolite, des systèmes et des procédés pour préparer et utiliser les catalyseurs de zéolite ayant la structure cristalline CHA. Les catalyseurs peuvent être utilisés pour éliminer les oxydes d'azote d'un milieu gazeux dans une large plage de températures et se montrer hydrothermiquement stables à des températures de réaction élevées. Les catalyseurs de zéolite comprennent un véhicule de zéolite ayant un rapport silice sur alumine d'environ 15 : 1 à environ 256 : 1 et un rapport cuivre sur alumine d'environ 0,25 : 1 à environ 1 : 1.

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