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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons22251

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22181

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

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Paper_281011_OO_RS_EK.doc
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Zitation

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


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-F0B4-C
Zusammenfassung
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).