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Catalytic dehydrogenation of ethylbenzene with carbon dioxide: promotional effect of antimony in supported vanadium–antimony oxide catalyst |
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| Authors: | Min-Seok Park Vladislav P Vislovskiy Jong-San Chang Yong-Gun Shul Jin S Yoo and Sang-Eon Park |
| Affiliation: | a Catalysis Center for Molecular Engineering, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Taejon 305-600, South Korea b Department of Chemical Engineering of Yonsei University, Seodaemun-gu, Shinchon-dong 134, Seoul 120-749, South Korea |
| Abstract: | Alumina-supported vanadium oxide, VOx/Al2O3, and binary vanadium–antimony oxides, VSbOx/Al2O3, have been tested in the ethylbenzene dehydrogenation with carbon dioxide and characterized by SBET, X-ray diffraction, X-ray photoelectron spectroscopy, hydrogen temperature-programmed reduction and CO2 pulse methods. VSbOx/Al2O3 exhibited enhanced catalytic activity and especially on-stream stability compared to VOx/Al2O3 catalyst. Incorporation of antimony into VOx/Al2O3 increased dispersion of active VOx species, enhanced redox properties of the systems and formed a new mixed vanadium–antimony oxide phase in the most catalytically efficient V0.43Sb0.57Ox/Al2O3 system. |
| Keywords: | Ethylbenzene Dehydrogenation Styrene Carbon dioxide Oxidant Supported V–Sb oxide catalysts Antimony promoter |
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