TiO2-SiO2 catalysts were prepared by the sol-gel method,and the effect of SiO2 loading on activi-ty and stability of the TiO2-SiO2 catalyst was studied.The effects of reaction temperature,ethylbenzene space velocity,and catalyst particle size on ethylbenzene dehydrogenation to styrene were investigated.The catalysts were characterized by BET and SEM.The results show that the TiO2-SiO2 catalyst has a good activity for the dehydrogenation of ethylbenzene to styrene;When the SiO2 loading was mass fraction of 20％,the conversion of ethylbenzene and the selectivity of styrene were significantly improved.SEM proved that the surface of the TiO2-SiO2 catalyst with SiO2 loading was 20％was smooth,the particles were fine and uniformly distributed,and the structure was loose and porous.
关键词
有机化学工程/二氧化碳/乙苯/苯乙烯/二氧化硅/二氧化钛
Key words
fine chemical engineering/carbon dioxide/ethylbenzene/styrene/silicon dioxide/titanium dioxide
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