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1 Polish Journal of Chemistry

1 1998

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Oxidative dehydrogenation of isobutane on chromium oxide-titania catalysts

Grzybowska B., Słoczyński J., Grabowski R., Wcisło K., Kozłowska A., Stoch J., Serwicka E.

Polish Journal of Chemistry

1998

Vol. 72, nr 9

2159-2171

Oxidative dehydrogenation of isobutane has been studied at 250 degreeC for a series of chromium oxide-TiO2 (anatase) samples containing 5-50 Cr at per nm(2) of the support surface and for pure chromia. The catalysts have been characterized by XPS, Raman, ESR spectroscopies and by probe reactions for acido-basic properties and the catalyst oxygen reactivity. The maximum activity and selectivity to isobutene have been observed for a catalyst containing 1 theoretical monolayer of the chromia phase on titania. Higher selectivity to isobutene for this catalyst as compared with unsupported chromia or catalysts with higher Cr loading has been ascribed to lower acidity and lover reactivity of oxygen.