Abstract
The titania-supported Mn oxide system made by incipient wetness impregnation method was investigated in the reaction of heterogeneous catalytic decomposition of ozone. The catalytic activity of the catalysts containing 6, 8 and 10 wt % manganese oxide was found using the decomposition coefficient g which is proportional to ozone decomposition rate. It was established that all catalytic samples are active towards ozone decomposition but the catalyst possessing
Highlights
Ozone is widely used in the industrial and environmental processes such as semiconductor manufacturing, deodorization, disinfection and water treatment [16]
The catalytic activity was evaluated on the basis of the coefficient g [20] that is proportional to ozone decomposition rate and to catalyst efficiency
The experiments were carried out with ozone flow rate in the range 6–24 l h-1 at room temperature.It was found that all three types of catalytic samples are active in the process of ozone decomposition
Summary
Ozone is widely used in the industrial and environmental processes such as semiconductor manufacturing, deodorization, disinfection and water treatment [16]. An effective method for purification of waste gases containing ozone is the heterogeneous catalytic decomposition [4]. Manganese oxide catalysts are useful for the decomposition of ozone in gas streams [19]. The aim of present study is to investigate the catalytic activity of titania-supported manganese oxide system during heterogeneous catalytic decomposition of ozone and to determine its composition and surface properties using different physical methods for analysis. The synthesized catalytic samples contained 5.5, 7.4 and 9.3 % molar percentages respectively on the TiO2 support. These values were calculated on the basis of assumption that MnO2 was formed on the support surface.
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