Patent ID: 9079162
Filing Date: 2015-07-14
Classification: B01D,B01J

Abstract:
1. A process for the treatment of a gas stream comprising NO x , the process comprising conducting the gas stream gas stream over a catalyst for use in selective catalytic reduction (SCR) of NO x , said catalyst comprising one or more zeolites of the MFI structure type, and one or more zeolites of the BEA structure type, wherein at least part of the one or more zeolites of the MFI structure type and at least part of the one or more zeolites of the BEA structure type respectively contain iron (Fe), and wherein iron in a positive oxidation state is contained within the porous structure of the respective zeolite framework, and wherein the amount of Fe in the one or more zeolites of the MFI structure type is comprised in the range of from 2.5 to 5.5 wt.-% based on the weight of the said one or more zeolites of the MFI structure type, and the amount of Fe in the one or more zeolites of the BEA structure type ranges from 0.5 to 2 wt.-% based on the weight of said one or more zeolites of the BEA structure type.