脱氢
化学
丙烯
催化作用
丙烷
镁
无机化学
氧化物
有机化学
作者
D. Siew Hew Sam,V. Soenen,J.C. Volta
标识
DOI:10.1016/0021-9517(90)90139-b
摘要
Oxidative dehydrogenation of propane was studied at 500-550°C over VMg-oxide catalysts and over the reference phases orthovanadate, pyrovanadate, and metavanadate of magnesium. Characterization of the reference phases was performed by XRD, IR spectroscopy, TEM, STEM, and 51V NMR and compared with the VMgO catalysts. In contrast with previous results by Kung, it was observed that the actual catalyst for dehydrogenation of propane to propene is pyrovanadate of magnesium. This specificity is explained on the basis of a dynamic model of the working catalyst favored by the corner-sharing VO4 tetrahedra of the V2O74− units.
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