Photocatalytic oxidative desulfurization of dibenzothiophene catalyzed by amorphous TiO2 in ionic liquid

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• 作者：Wenshuai Zhu (1)
  Yehai Xu (1)
  Huaming Li (1)
  Bilian Dai (1)
  Hui Xu (2)
  Chao Wang (1)
  Yanhong Chao (1)
  Hui Liu (1)
  
• 关键词：Amorphous TiO2 ; Photocatalytic Oxidative ; Desulfurization
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：31
• 期：2
• 页码：211-217
• 全文大小：665 KB
• 作者单位：Wenshuai Zhu (1)
  Yehai Xu (1)
  Huaming Li (1)
  Bilian Dai (1)
  Hui Xu (2)
  Chao Wang (1)
  Yanhong Chao (1)
  Hui Liu (1)
  
  1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
  2. School of the Environment, Jiangsu University, Zhenjiang, 212013, P. R. China
  
• ISSN：1975-7220

文摘

Three types of TiO2 were synthesized by a hydrolysis and calcination method. The catalysts were characterized by X-ray powder diffraction (XRD), diffuse reflectance spectrum (DRS), Raman spectra, and X-ray photoelectron spectroscopy (XPS). The XRD and Raman spectra indicated that amorphous TiO2 was successfully obtained at 100 °C. The results indicated that amorphous TiO2 achieved the highest efficiency of desulfurization. The photocatalytic oxidation of dibenzothiophene (DBT), benzothiophene (BT), 4,6-dimethyldibenzothiophene (4,6-DMDBT) and dodecanethiol (RSH) in model oil was studied at room temperature (30 °C) with three catalysts. The system contained amorphous TiO2, H2O2, and [Bmim]BF4 ionic liquid, ultraviolet (UV), which played vitally important roles in the photocatalytic oxidative desulfurization. Especially, the molar ratio of H2O2 and sulfur (O/S) was only 2: 1, which corresponded to the stoichiometric reaction. The sulfur removal of DBT-containing model oil with amorphous TiO2 could reach 96.6%, which was apparently superior to a system with anatase TiO2 (23.6%) or with anatase -rutile TiO2 (18.2%). The system could be recycled seven times without a signicant decrease in photocatalytic activity.