高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (4): 608.

• 论文 • 上一篇    下一篇

丙烷氧化脱氢催化剂V2O5/MPO4(M=Al,Zr,Ca)的研究

张伟德, 沙开清, 李基涛, 万惠霖   

  1. 厦门大学化学系、固体表面物理化学国家重点实验室、物理化学研究所, 厦门 361005
  • 收稿日期:1998-05-27 出版日期:1999-04-24 发布日期:1999-04-24
  • 通讯作者: 张伟德,男,34岁,博士,副教授.
  • 作者简介:张伟德,男,34岁,博士,副教授.
  • 基金资助:

    国家自然科学基金(29392006)资助课题

Studies of the V2O5/MPO4(M=Al, Zr, Ca) Catalysts in Propane Oxidative Dehydrogenation

ZHANG Wei-De, SHA Kai-Qing, LI Ji-Tao, WAN Hui-Lin   

  1. Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surface and Institute of Physical Chemistry, Xiamen University, Xiamen, 361005
  • Received:1998-05-27 Online:1999-04-24 Published:1999-04-24

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摘要： 制备了3种磷酸盐(MPO4,M=Al,Zr,Ca)载体,并在其上负载0.6%～6.0%的V2O5.活性评价结果表明,负载型V2O5/MPO4催化剂在丙烷氧化脱氢反应中具有良好的催化性能.丙烯选择性按V2O5/Ca3(PO4)2>V2O5/Zr3(PO4)4>V2O5/AlPO4顺序降低,这与载体的碱性强弱顺序变化一致.载体的性质和钒的负载量影响催化剂的氧化还原性能.ESR结果表明,V4+离子能可逆存在于催化剂中,暗示V5+/V4+氧化还原偶参与了氧化还原反应.

关键词: 丙烷, 氧化脱氢, 负载型钒基催化剂

Abstract: The supports of MPO4(M=Al, Zr, Ca) were prepared and 0.6%～60%V2O5was supported on them. The catalysts are effective in the oxidative dehydrogenation of propane. The selectivity of C3H6over the catalysts decreases in the order of V2O5/Ca3(PO4)2>V2O5/Zr3(PO4)4>V2O5/AlPO4, which followed the same trend of the basicity of the supports. The properties of the supports and the amount of loading had an effect on the redox property and the catalytic behavior of the catalysts. The ESR results indicated that the redox couple of V5+/V4+responded to the activity of oxidative dehydrogenation for propane.

Key words: Propane, Oxidative dehydrogenation, Supported vanadium-based catalyst

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