Ｃｕ含有ＣＨＡ構造型ゼオライト及びＦｅ含有ＭＦＩ構造型ゼオライトを含む選択的触媒還元用触媒、この触媒を含む排気ガス処理システム、及びこの触媒を使用してＮＯＸを含むガス流を処理する方法

摘要

A catalyst is provided, preferably for the use in selective catalytic reduction (SCR). Said catalyst comprises one or more zeolites of the MFI structure type, and one or more zeolites of the CHA structure type, wherein at least part of the one or more zeolites of the MFI structure type contains iron (Fe), and wherein at least part of the one or more zeolites of the CHA structure type contains copper (Cu). Furthermore, provided are an exhaust gas treatment system comprising said catalyst as well as a process for the treatment of a gas stream comprising NOX using said catalyst as well.