Synthesis and characterization of phosphotungstic acid/ activated carbon as a novel ultrasound oxidative desulfurization catalyst  

作　　者：Liyan LIU Yu ZHANG Wei TAN 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

出　　处：《Frontiers of Chemical Science and Engineering》2013年第4期422-427,共6页化学科学与工程前沿（英文版）

摘　　要：Phosphotungstic acid/activated carbon （PTA/ AC） catalysts with various AC sizes or PTA content have been synthesized and characterized by N2 physisorption, X-ray diffraction, Fourier transform infrared spectroscopy and temperature programmed desorption of ammonia. These catalysts were then evaluated in terms of the removal of dibenzothiophene （DBT） by ultrasound- assisted oxidative desulfurization process. The results showed that the DBT conversion obviously increased with the decrease of AC support size and the increase of PTA content. After supporting PTA on AC, the DBT conversion can be improved by 38.9% after ultrasound irradiation for 10 min. In addition, the stability tests of PTA/AC showed that the catalytic oxidative activity of PTA/AC was nearly kept constant after ultrasound irradiation for 20 min, which makes it a promising catalyst to use in ultrasound-assisted oxidative desulfurization processPhosphotungstic acid/activated carbon （PTA/ AC） catalysts with various AC sizes or PTA content have been synthesized and characterized by N2 physisorption, X-ray diffraction, Fourier transform infrared spectroscopy and temperature programmed desorption of ammonia. These catalysts were then evaluated in terms of the removal of dibenzothiophene （DBT） by ultrasound- assisted oxidative desulfurization process. The results showed that the DBT conversion obviously increased with the decrease of AC support size and the increase of PTA content. After supporting PTA on AC, the DBT conversion can be improved by 38.9% after ultrasound irradiation for 10 min. In addition, the stability tests of PTA/AC showed that the catalytic oxidative activity of PTA/AC was nearly kept constant after ultrasound irradiation for 20 min, which makes it a promising catalyst to use in ultrasound-assisted oxidative desulfurization process

关 键 词：phosphomngstic acid activated carbon ultra-sound-assisted oxidative desulfurization 

分 类 号：TQ426.94[化学工程] X703.1[环境科学与工程—环境工程]