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Catalytic Oxidation of Toluene over Mn-Ce/${\gamma}-Al_2O_3$ Catalyst Doped with Ce  

Cheon, Tae-Jin (Department of Environmental Science and Engineering, Keimyung University)
Kim, Hye-Jin (Department of Environmental Science and Engineering, Keimyung University)
Choi, Sung-Woo (Department of Environmental Science and Engineering, Keimyung University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.5, 2005 , pp. 513-518 More about this Journal
Abstract
Catalytic oxidation of toluene on the manganese oxide catalysts and manganese-cerium oxide catalysts was investigated. The catalysts were characterised by X-ray diffraction(XRD), thermo gravimetric analyzer(TGA), toluene-temperature program reduction(Toluene-TPR). We found that the optimal manganese content was 18.2 wt.% and the optimal cerium content was 10.0 wt.% at catalytic oxidation of toluene. It is shown that ceria improves the activity of manganese oxide phases. From the XRD results, it was estimated that $MnO_2$ phase was active site in the monometallic and bimetallic catalysts. From the TGA and Toluene-TPR results, it show that ceria improves the mobility of the lattice oxygen, adequate oxidation state of the active phase, reduction ability at low temperature, and re-oxidation of the active site.
Keywords
Catalytic Oxidation; Toluene; Manganese Axide; Toluene-TPR;
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