EMISSION CONTROL CATALYST AND EMISSION CONTROL METHOD USING THE SAME

摘要

An emission control catalyst for highly efficiently reducing nitrogen oxides to harmless gas for removal even if oxygen in the exhaust gas is highly dense and which is durable and an emission control method using the catalyst. The catalyst is an emission control catalyst in which copper ingredients are carried on a catalyst carrier containing type MFI zeolite in which the number of SiOH residues is 5x10<20>/g or less and the molar ratio of SiO2 to A12O3 is 20-200. This catalyst is used for the control of emission and then carried out in an oxidizing atmosphere with a hydrocarbon at a reaction temperature of 200-800 DEG C and a ratio of the THC concentration to the NOx concentration of 0.5-200.