THE oxidative dehydrogenation of propane （ODP） to propene is one of the potentially important catalytic processes for the effective utilization of light alkanes. The VMgO catalysts which have better catalytic perfor...THE oxidative dehydrogenation of propane （ODP） to propene is one of the potentially important catalytic processes for the effective utilization of light alkanes. The VMgO catalysts which have better catalytic performances for the reaction have aroused much interest and argument.Kung et al. proposed that the active phase was magnesium orthovanadate （Mg<sub>3</sub>V<sub>2</sub>O<sub>8</sub>）, but Volta et al. suggested that magnesium pyrovanadate （α-Mg<sub>2</sub>V<sub>2</sub>O<sub>7</sub>） was the active phase; in this phase, V<sup>4+</sup> ions which are associated to the formation of oxygen vacancies could stably exist, and Mg<sub>3</sub>V<sub>2</sub>O<sub>8</sub> is responsible for the total oxidation due to nonexistence of V<sup>4+</sup> ions.展开更多
文摘THE oxidative dehydrogenation of propane （ODP） to propene is one of the potentially important catalytic processes for the effective utilization of light alkanes. The VMgO catalysts which have better catalytic performances for the reaction have aroused much interest and argument.Kung et al. proposed that the active phase was magnesium orthovanadate （Mg<sub>3</sub>V<sub>2</sub>O<sub>8</sub>）, but Volta et al. suggested that magnesium pyrovanadate （α-Mg<sub>2</sub>V<sub>2</sub>O<sub>7</sub>） was the active phase; in this phase, V<sup>4+</sup> ions which are associated to the formation of oxygen vacancies could stably exist, and Mg<sub>3</sub>V<sub>2</sub>O<sub>8</sub> is responsible for the total oxidation due to nonexistence of V<sup>4+</sup> ions.
