| 摘要 |
PURPOSE:To prevent the deterioration of the heat resistance of a catalyst for removal of nitrous oxide in waste gas by reduction with ammonia and to allow the catalyst to exhibit high removal activity from a low temp. by using pentasil type zeolite as the carrier and carrying iron as a catalytic component. CONSTITUTION:In a catalyst 2 for removal of N2O in waste gas by reduction with ammonia, pentasil type zeolite is used as the carrier and iron is carried as a catalytic component on the carrier. The catalyst 2 is packed into a reactor 5 installed in a passage for N2O-contg. waste gas discharged from a burner 1, NH3 is blown into the waste gas on the upper stream side of the catalyst 2 and the N2O is reduced with the NH3 in a temp. region of >=400 deg.C. By this process, N2O as an ozone layer destroying substance can be removed at 350-500 deg.C as the usual temp. of waste combustion gas. |
