CATALYST FOR TREATING EXHAUST GAS

摘要

Provided is a metal promoted low SAR zeolite based SCR catalyst having at least about 1.35 weight percent of cerium based on the total weight of the zeolite wherein said cerium is present in a form selected from exchanged cerium ions monomeric ceria oligomeric ceria and combinations thereof provided that said oligomeric ceria has a particle size of less than 5 µm the catalyst having superior durability after hydrothermal aging.