Zeolite and redox oxide combined catalyst body

摘要

Extruded honeycomb catalyst bodies and methods of manufacturing same. The catalyst body includes a first oxide selected from the group consisting of tungsten oxides, vanadium oxides, and combinations thereof, a second oxide selected from the group consisting of cerium oxides, lanthanum oxides, zirconium oxides, and combinations thereof, and a zeolite.

主权项

1. A NO reducing catalytic structure, comprising:
a first oxide of WO3; a second oxide of CeO2—ZrO2; and a zeolite, wherein the first oxide, namely WO3, and the second oxide, namely CeO2 and ZrO2, are expressed as WO3—CeO2—ZrO2, and the second oxide, namely CeO2 and ZrO2, is a solid solution of CeO2 and ZrO2, wherein the catalyst structure is substantially free of platinum, palladium, and rhodium, and wherein an external layer of the catalytic structure comprises a mixture of the first oxide and the second oxide without zeolite on a layer comprising the zeolite.