Highly selective and stable propane dehydrogenation to propene over dispersed VO
x-species under oxygen-free and oxygen-lean conditions

Ovitser, Olga; Schomäker, Reinhard; Kondratenko, Evgenii V.; Wolfram, Till; Trunschke, Annette

doi:10.1016/j.cattod.2012.01.034

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Highly selective and stable propane dehydrogenation to propene over dispersed VO_x-species under oxygen-free and oxygen-lean conditions

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Wolfram, Till
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Trunschke, Annette
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Ovitser, O., Schomäker, R., Kondratenko, E. V., Wolfram, T., & Trunschke, A. (2012). Highly selective and stable propane dehydrogenation to propene over dispersed VO_x-species under oxygen-free and oxygen-lean conditions. Catalysis today, 192(1), 16-19. doi:10.1016/j.cattod.2012.01.034.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-F0B4-C

Abstract

For the first time, we reported on a highly selective propane dehydrogenation to propene over SiO2- supported dispersed VOx species under oxygen-free and oxygen-lean conditions. Propene selectivity above 80% was achieved with propane conversions above 45% at 823–843 K. At operation under oxygenlean conditions, consecutive propene conversion to COx was significantly suppressed and propene was formed additionally via the highly selective non-oxidative dehydrogenation route over the same catalyst. Usage of SiO2 supports (MCM-41, SBA-15, SiO2) with no strong acid sites and co-feeding of small O2 amounts lead to very limited coke formation (<2 wt. % after 20 h on-stream operation). This results in only slight decrease in time-on-stream performance (ca. 10% of deactivation during 20 h).