Effect of TiO 2 loading on the activity of V/TiO 2 -Al 2 O 3 in the catalytic oxidehydrogenation of ethylbenzene with carbon dioxide

2010, Volume 4, Issue 2

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Frontiers of Chemical Science and Engineering >> 2010, Volume 4, Issue 2 doi: 10.1007/s11705-009-0233-2

Effect of TiO 2 loading on the activity of V/TiO 2 -Al 2 O 3 in the catalytic oxidehydrogenation of ethylbenzene with carbon dioxide

Key Laboratory of Coal Science and Technology for MOE and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;

Available online: 2010-06-05

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Abstract

TiO-AlOmixed oxides with different compositions ranging from 40wt-% to 95wt-% of TiO were prepared by sol-gel method and impregnated with different amounts of VO. Supports and catalysts were characterized by X-ray diffraction (XRD), physisorption, temperature preprogrammed reduction (H-TPR), and ammonia temperature programmed desorption (NH-TPD). TiO content in the support had obvious effect on the crystal structure, texture characteristic, acid property, and catalytic activity in dehydrogenation of ethylbenzene (EB) with carbon dioxide. The highest catalytic activity was acquired when the TiO content was 50 wt-%.

Keywords

desorption ; different ; TiO-AlOmixed ; physisorption ; ethylbenzene

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