| 丙烷氧化脱氢反应中Mg_2V_2O_7催化剂氧活度的原位监测 |
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| 引用本文： | 计宝峰,汪纪波,楚文玲,朱雪峰,杨维慎,林励吾.丙烷氧化脱氢反应中Mg_2V_2O_7催化剂氧活度的原位监测[J].催化学报,2009,30(5). |
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| 作者姓名： | 计宝峰 汪纪波 楚文玲 朱雪峰 杨维慎 林励吾 |
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| 作者单位： | 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;中国科学院研究生院,北京,100049
2. 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 |
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| 基金项目： | 国家杰出青年科学基金 |
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| 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氧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.
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| 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 |
In Situ Monitoring of the Oxygen Activity on a Mg_2V_2O_7 Catalyst during the Oxidative Dehydrogenation of Propane |
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| JI Baofeng,WANG Jibo,CHU Wenling,ZHU Xuefeng,YANG Weishen,LIN Liwu.In Situ Monitoring of the Oxygen Activity on a Mg_2V_2O_7 Catalyst during the Oxidative Dehydrogenation of Propane[J].Chinese Journal of Catalysis,2009,30(5). |
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| Authors: | JI Baofeng WANG Jibo CHU Wenling ZHU Xuefeng YANG Weishen LIN Liwu |
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| Institution: | JI Baofeng1,2,WANG Jibo1,CHU Wenling1,ZHU Xuefeng1,YANG Weishen1,LIN Liwu1 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 |
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| Abstract: | Periodic oscillations in the oxygen activity on a Mg2V2O7 catalyst during the oxidative dehydrogenation of propane were monitored in situ by solid electrolyte potentiometry.The results directly showed that the catalyst was first reduced and then oxidized.The rate-determining step was the adsorption and activation of propane on the Mg2V2O7 catalyst.Propane and oxygen were adsorbed on different sites of the Mg2V2O7 catalyst. |
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| Keywords: | propane propene vanadium and magnesium oxide catalyst oxygen activity solid electrolyte potentiometry |
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