PROCEDE POUR LE PIEGEAGE DES NOX DANS LE TRAITEMENT DE GAZ EN VUE DE LA REDUCTION DES EMISSIONS D'OXYDE D'AZOTE UTILISANT UN CATALYSEUR A BASE DE MANGANESE

摘要

The invention concerns a method for trapping NOx in gas treatment to reduce nitrogen oxide emissions. The method is characterised in that it consists in using a mass catalyst based on an oxide of formula (1): AxMn1-yByO2+/- delta wherein: A represents one or several elements selected from groups IA, IIA, IIIA of the periodic table; B is a metal selected among tin and elements of groups IVA to IIIB of the periodic table; x and y having the following values: 0.16