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MATÉRIAUX ZÉOLITIQUES ACTIVÉS PAR LE CUIVRE DE LA STRUCTURE DE CADRE CHA ISSUS D'UNE SYNTHÈSE SANS MODÈLE ORGANIQUE, ET LEUR UTILISATION EN RÉDUCTION CATALYTIQUE SÉLECTIVE DE NOx
MATÉRIAUX ZÉOLITIQUES ACTIVÉS PAR LE CUIVRE DE LA STRUCTURE DE CADRE CHA ISSUS D'UNE SYNTHÈSE SANS MODÈLE ORGANIQUE, ET LEUR UTILISATION EN RÉDUCTION CATALYTIQUE SÉLECTIVE DE NOx
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摘要
A synthetic copper and/or iron containing zeolitic material having a CHA framework structure, wherein the CHA framework structure comprises SiO 2,X 2O 3, and optionally comprises Z 2O 5, wherein X is a trivalent element, and Z is a pentavalent element, wherein the zeolitic material contains from 3.8 to 12 wt.% of Cu and/or Fe calculated as the respective element and based on 100 wt.% of SiO 2 contained in the zeolitic material having a CHA framework structure, and wherein the 29Si MAS NMR of the zeolitic material comprises: a first peak (P1) in the range of from -96 to -98.8 ppm; a second peak (P2) in the range of from -102 to -104.5 ppm; and a third peak (P3) in the range of from -107.5 to -111 ppm; wherein the integration of the first, second, and third peaks in the 29Si MAS NMR of the zeolitic material offers a ratio of the integration values P1:P2:P3 ranging from (0.35-0.7):1: (0.1-1.6), as well as to a process for its preparation, and to the use thereof, in particular in a method for the selective catalytic reduction of NO x.
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