(504c) Oxidative Desulfurization of DBT with H2O2 Catalysed By TiO2/Porous Glass

Authors: 
Luo, G., Tsinghua University
Oxidative desulfurization of DBT with H2O2 catalysed by TiO2/porous glass

Chun Shenâ? , Yujun Wang*â??â?¡, Jianhong Xuâ?¡, Tianwei Tanâ? , Guangsheng Luo*â??â?¡

 

â? Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

â?¡The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

 

Corresponding author: Tel: 86-010-62788568, Fax: 86-010-62788568

Email address: wangyujun@tsinghua.edu.cn and gsluo@tsinghua.edu.cn

 

Abstract

Aimed at ultra-deep oxidative desulfurization (ODS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) to control air pollution, we specially designed and prepared porous glass supported with TiO2 nanoparticles acting as an amphiphilic catalyst. Hydrogen peroxide which is considered as the â??greenâ? oxidant was used, and for the extreme liquidâ??liquid phase ratio (usually larger than 1500) reaction system, the pore volume of 0.19 mL/g of the catalyst provides enough space for storage of hydrogen peroxide. The as-prepared catalyst offers a high interfacial surface area of 116.9 m2/g and enhances the reaction by facilitating the mass transfer. The mono-dispersed TiO2 exhibited good crystallinity. The mean diameter varied from 2.1 to 7.8 nm with the loading amount increased from 1.27 wt.% to 9.85 wt.%. The catalyst showed high activity and good stability for producing ultra-clean fuels: 100% conversion was obtained within 2 min and the conversion just decreased from 100.0±1.0 % to 94.3±0.6 %after 5 cycles. Overall, this new reusable catalyst provided an alternative for highly efficient ultra-deep desulfurization in a green way.

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