Supported Metal Oxide Catalysts for Ozone Decomposition

Activated carbon,γ-Al2O3 and molecule sieve-supported MnO2,CuO and Fe2O3 catalysts were prepared by the impregnation method.And,the activities of catalytic decomposition of ozone were studied over these catalysts.The results show that catalytic activity of MnO2 catalyst is superior to those of CuO and Fe2O3 catalysts,and activated carbon is more suitable as a support than γ-Al2O3 and molecule sieve.The temperature has a significant effect on catalytic activity.The conversion rate of ozone decomposition over MnO2/AC is more than 80% at 90 ℃.The higher the humidity is,the lower the catalytic activity is.When the initial ozone concentration is lower than 50 mg/L,the increase of the initial ozone concentration results in a decrease in catalytic activity.