INOR 366 |
| Jason D. Pless, Chemical and Biological Technologies, Sandia National Laboratories, P.O. Box 5800, 0734, Albuquerque, NM 87185-0734, Billy B Bardin, The Dow Chemical Company, 3200 Kanawha Tpk, South Charleston, WV 25303, Peter C Stair, Institute for Environmental Catalysis, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, and Kenneth R. Poeppelmeier, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208. |
| The selective conversion of short chain alkanes into useful intermediates via catalytic oxidative dehydrogenation (ODH) is of interest to the petrochemical industry. A series of single-phase compositions found in the MgO – V2O5 – MoO3 ternary phase diagram, such as Mg3(VO4)2, Mg2V2O7, MgMoO4, etc., were investigated for their activity and selectivity for the oxidative dehydrogenation (ODH) of propane. Catalytic data show that molybdenum substitution on vanadium sites increases both the selectivity and activity of propane ODH. The increase in selectivity and activity seen with molybdenum substitution is associated with Mg cation vacancies formed from the substitution of Mo6+ for V5+. The cation vacancies allow for a more facile diffusion of the bulk oxide anions to the catalyst surface. The relationship between structure and the catalytic activity and selectivity of Mg3(VO4)2 and Mg0.992MoO3.992 was studied by in situ visible and ultraviolet Raman spectroscopy. The present work is directed toward understanding the reaction mechanism of propane ODH on the catalyst surface. |
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Homogeneous and Heterogeneous Oxidation Catalysis
8:30 AM-12:05 PM, Tuesday, August 24, 2004 Pennsylvania Convention Center -- 108A, Oral
Division of Inorganic Chemistry |