Redox Nature of Fe-Incorporated Magnesium ortho-Vanadate as a Catalyst for the Oxidative Dehydrogenation of Propane

DOI Web Site Web Site 被引用文献1件 参考文献27件
  • Sugiyama Shigeru
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima
  • Osaka Takeshi
    Department of Chemical Science and Technology, The University of Tokushima
  • Hirata Yuuki
    Department of Chemical Science and Technology, The University of Tokushima
  • Kondo Yuki
    Department of Chemical Science and Technology, The University of Tokushima
  • Nakagawa Keizo
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima
  • Sotowa Ken-Ichiro
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Geosphere Environment and Energy, Center for Frontier Research of Engineering, The University of Tokushima Department of Chemical Science and Technology, The University of Tokushima

この論文をさがす

抄録

In order to improve the catalytic activity of magnesium ortho-vanadate (Mg3V2O8) for the oxidative dehydrogenation of propane, Mg3V2O8 doped with Fe3+ (Fe–Mg3V2O8) was prepared. The improvement of the conversion of propane from 4.8% on Mg3V2O8 to 8.2% on 5% Fe–Mg3V2O8 together with the rather similar selectivity to propylene on un-doped and doped catalysts (62.3 and 61.0%, respectively). To evaluate the redox nature of Fe–Mg3V2O8 during the oxidative dehydrogenation, the catalysts used for the conversion of propane with and without gaseous oxygen were analyzed by XRD, solid state 51V MAS NMR, XAFS, and XPS. After the propane conversion without oxygen, complete conversion of Fe–Mg3V2O8 to Mg2VO4 and MgO together with a small amount of Fe2O3 was observed by XRD, while the reduction of V5+ to V4+ was detected by 51V MAS NMR and V K-edge XAFS from the catalyst. However XPS analysis showed that such a reduction was not observed over the surface of Fe–Mg3V2O8 since oxygen was supplied from bulk to the surface of the catalyst to keep V5+ over the surface. After the treatment of the reduced catalysts with gaseous oxygen, the complete regeneration of Fe–Mg3V2O8 from the reduced phase was confirmed by those analyses.

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (27)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ