FIELD: chemistry.
SUBSTANCE: invention relates to method of converting nitrogen oxides into nitrogen. Method is realised by contact of nitrogen oxides with nitrogenous reducing agent in presence of synthetic zeolite catalyst, which contains from 0.1 to 10 wt % of metal per total weight of zeolite catalyst. Metal is selected from Cu, Fe or their combination. Zeolite catalyst is applied on filter substrate and represents silicoalumophosphate zeolite (SAPO) with CHA type structure.
EFFECT: invention makes it possible to create effective SCR-catalysts, which possess good low-temperature SCR activity, high selectivity to N2, and good thermal stability, and also are relatively resistant to inhibition with hydrocarbons.
17 cl, 2 tbl, 17 dwg
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