Molybdenum catalysts(15 wt% Mo O3loading) supported on alumina,alumina–magnesia,and alumina–chromia were prepared via impregnation technique and studied for the reaction of methyl-cyclohexane dehydrogenation. The catalysts were evaluated by means of FT-IR,XRD,DSC,TPR,and N2adsorption–desorption isotherms. The results clarified that Mo/alumina–magnesia catalyst possesses small crystallite size and high surface area(240 m2/g) and is selective toward the formation of dehydrogenated product(96.5%). The yield to ring-opening products is higher on Mo/alumina–chromia catalyst due to its higher acidity and larger metal crystals,which favor the ring-opening reaction and lower metallic activity with selectivity toward ringopening products(32%).
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