CATALYST FOR PURIFYING EXHAUST GAS AND PRODUCTION THEREOF

摘要

PURPOSE:To produce a catalyst excellent in NOx reductive removing performance after using for a long period of time and also low in pressure loss of exhaust gas in the catalyst. CONSTITUTION:In the catalyst in which a slurry mixing at lest an org. material consisting essentially of a zeolite powder whose copper ion is exchanged, a sol consisting essentially of silica sol and water is applied to a honeycomb carrier, a coating wt. to the honeycomb carrier is 150-400g/L and 45-80% numerical aperture of the honeycomb carrier.