催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (5): 375-377.

• 研究快讯 •    下一篇

丙烷氧化脱氢反应中Mg2V2O7催化剂氧活度的原位监测

计宝峰 1,2, 汪纪波 1,2, 楚文玲 1, 朱雪峰 1, 杨维慎 1, 林励吾 1   

  1. 1 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2009-05-25 出版日期:2009-05-25 发布日期:2013-02-05

In Situ Monitoring of the Oxygen Activity on a Mg2V2O7 Catalyst during the Oxidative Dehydrogenation of Propane

JI Baofeng1,2, WANG Jibo1,2, CHU Wenling1, ZHU Xuefeng1, YANG Weishen1,*, LIN Liwu1   

  1. 1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-05-25 Online:2009-05-25 Published:2013-02-05

PDF

935

被引次数

20

摘要： 采用固体电解质电动势测量法原位监测 Mg2V2O7 催化剂的表面氧活度在丙烷氧化脱氢反应中的周期性振荡现象. 直观地揭示了丙烷选择氧化反应中 Mg2V2O7 催化剂的先还原后氧化的过程. 结果表明, 丙烷选择氧化的控制步骤为丙烷在催化剂上的吸附和活化过程, 且丙烷和氧气在催化剂上的吸附位不同, 二者不存在竞争吸附.

关键词: 丙烷, 丙烯, 钒镁氧催化剂, 氧活度, 固体电解质电动势测量法

Abstract: Oxygen activity oscillations were observed by a solid state electrolyte potentiometry method on a Mg2V2O7 catalyst at 500 oC in oxidative dehydrogenation of propane. When the catalyst was exposed to different atmospheres, the periods of oscillations were the same, 2.4 s. The adsorption and activation of propane needed 2.4 s, and the reduction and oxidization processes only spent the remanent 0.4 s.

Key words: propane, propene, vanadium and magnesium oxide catalyst, oxygen activity, solid electrolyte potentiometry