Abstract
Abstract The oxidative dehydrogenation of propane to propene on active catalysts such as magnesium vanadates (MgV2O6, Mg2V2O7, and Mg3V2O8) has been investigated in the presence and absence of tetrachloromethane (TCM) at 723 K. The introduction of a small amount of TCM into the feedstream did not influence the selectivity to propene while the conversion of propane was improved on those catalysts. The conversion was enhanced by approximately twice on Mg2V2O7 upon addition of TCM. It has been shown that the effects of TCM on lattice oxygen in those catalysts mainly control the enhancement. The formation of an excess amount of the chlorinated species on the surface of the catalysts resulted in a decrease of the conversion.
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