Toluene Catalytic Oxidation by Manganese Oxide : (I) Activity and Characterization

The catalytic oxidation of toluene in low concentration was investigated over manganese oxide/-A1O catalysts. As increased manganese loading, the conversion of toluene increased at a lower temperature. The 18.2wt Mn/-AlO appeared to be the most active catalyst. XRD results indicated that most of the catalysts exist as MnO and MnO crystalline phase. After the reaction, the used and the fresh catalysts were characterized by XPS. For the used catalyst, a prominent feature has increased. TPR profiles of 18.2 wt Mn/-AlO changed significantly as the manganese loading increased at a lower temperature.