Abstract
Supported vanadium oxide catalysts containing surface vanadia species on oxide supports are extensively employed as catalysts for many hydrocarbon oxidation reactions. This article studies the structure and reactivity of surface vanadia species supported on purified natural dolomite. CaO-MgO oxide support was derived from purified calcined dolomite mineral. Ammonium metavanadate was used as a source of V2O5, and the vanadia contents were varied from 10–18 wt%. The CaO-MgO support and the prepared vanadia catalysts (V1, V2, V3) were characterized by means of X-ray, FTIR, and scanning electron microscopy. The activity of the prepared catalysts and the influence of vanadium loading on the catalytic performance for oxy-dehydrogenation of methyl cyclohexane were investigated at reaction temperatures ranging from 250°C to 450°C and under atmospheric pressure.
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