| abstract |
The present invention is a catalyst for selective catalytic reduction of NO x comprising a zeolitic material, the zeolitic material comprising: (A) having a GME framework structure containing YO 2 and X 2 O 3 , optionally further comprising one or more zeolites having a CHA framework structure containing YO 2 and X 2 O 3 , comprise one or more zeolites, and / or (B) CHA frames containing YO 2 and X 2 O 3 and one or more zeolites with GME framework structure containing YO 2 and X 2 O 3 Including one or more zeolite intergrowth phases composed of one or more zeolites having a work structure; Y is a tetravalent element, X is a trivalent element, and the zeolitic material is calculated as an element and is 0.1 to 15% by mass with respect to 100% by mass of YO 2 contained in the zeolitic material. It relates to a catalyst containing Cu and / or Fe as non-framework elements in a range of amounts, and a process for its production, and in particular a process for its use in the process of selective catalytic reduction of NO x . |