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Highly efficient mesoporous WO x /KIT-6 catalysts for oxidative desulfurization of dibenzothiophene with hydrogen peroxide

Research paper by Zhenghua Li, Chengbin Li; Su Bin Park; Gyoung Hee Hong; Jin Seo Park; Byung Jin Song; Chul Wee Lee; Ji Man Kim

Indexed on: 08 Jun '18Published on: 01 Jun '18Published in: Research on Chemical Intermediates



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.