Paper Title
Effect Of Calcination Temperature Of Mnxoy/Γ-Al2o3catalyst On Ozone Decomposition

Abstract
This study investigated the oxidation state, MnO 2 phase and ozone decomposition performance of manganese oxide catalysts prepared by changing the calcination temperature in the range of 300-900 o C.The manganese oxide was supported on ceramic foam, and instrumental techniques such as X-ray diffraction, scanning electron microscopy and surface area analysis were used to characterize the prepared catalysts. The experimental results showed that the chemical nature of Mn x O y changed from γ-MnO 2 to β-MnO 2 phasewith increasing the calcinations temperature. The ozone decomposition efficiency was the highest when the catalyst was calcined at 500 o C, and the optimum space velocity was found to be about 17500 hr -1 .At this temperature of 500 o C, β-MnO 2 coexisted with Mn 2 O 3 . Indexterms- Manganese oxide,Crystal structure, Ozone, XRD.