Highly efficient mesoporous WOx/KIT-6 catalysts for oxidative desulfurization of dibenzothiophene with hydrogen peroxide |
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Authors: | Zhenghua Li Chengbin Li Su Bin Park Gyoung Hee Hong Jin Seo Park Byung Jin Song Chul Wee Lee Ji Man Kim |
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Affiliation: | 1.Department of Chemistry,Sungkyunkwan University,Suwon,Republic of Korea;2.Division of Green Chemistry & Engineering Research,Korea Research Institute of Chemical Technology (KRICT),Daejeon,South Korea |
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Abstract: | Oxidative desulfurization (ODS) of organic compounds containing sulfur element from a model oil was performed using tungsten oxide catalysts supported on mesoporous silica with cubic Ia3d mesostructure, well-defined mesopores (7.2 nm), high surface area (719 m2/g), and three-dimensional pore network (WO x /KIT-6). The prepared WO x /KIT-6 catalysts (5–20 wt% WO x ) were characterized by X-ray diffraction analysis, N2 sorption measurements, electron microscopy, H2-temperature programmed reduction, Raman spectroscopy, and thermogravimetric analysis. Among the mesoporous catalysts, 10 wt% WO x /KIT-6 exhibited the best catalytic performance. Sulfur-containing organic compounds, such as dibenzothiophene, 4,6-dimethyldibenzothiophene, and benzothiophene, were completely (100 %) removed from the model oil over 10 wt% WO x /KIT-6 catalyst in 2 h. In addition, the catalyst could be reused several times with only slight decrease in catalytic activity. |
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