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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (18): 2001-2006. 上一篇    下一篇

研究论文

CO在Ag掺杂的氧化锰八面体分子筛上吸附的TAP研究

胡蓉蓉1, 程易1, 丁宇龙1, 谢兰英2, 王德峥*,1   

  1. (1 清华大学化学工程系北京市绿色反应工程与工艺重点实验室 北京 100084)
    (2 湖南中烟工业公司技术中心 长沙 410001)
  • 投稿日期:2006-11-29 修回日期:2007-03-21 发布日期:2007-09-28
  • 通讯作者: 王德峥

A TAP Study of CO Adsorption on Ag-Doped Manganese Oxide Octahedral Molecular Sieve

HU Rong-Rong1; CHENG Yi1; DING Yu-Long1; XIE Lan-Ying2; WANG De-Zheng*,1   

  1. (1 Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084)
    (2 Technology Center of China Tobacco Hunan Indurstrial Corporation, Changsha 410001)
  • Received:2006-11-29 Revised:2007-03-21 Published:2007-09-28
  • Contact: WANG De-Zheng

PDF

776

被引次数

7

利用产物瞬时分析反应器中进行的单脉冲实验, 考察了393～493 K温度范围内CO在Ag掺杂的氧化锰八面体分子筛上的吸附行为. 实验表明: CO在催化剂表面发生化学吸附, 并与晶格氧反应生成CO2. 通过对该过程反应物及产物脉冲响应曲线的模拟, 得到了各基元反应的动力学参数. CO和CO2在该催化剂表面的脱附活化能分别为83和31 kJ/mol, CO与晶格氧的反应活化能为116 kJ/mol.

关键词: 产物瞬时分析, CO氧化, 吸附, 动力学, 氧化锰, 八面体分子筛

CO adsorption on Ag-doped manganese oxide octahedral molecular sieves (Ag/OMS-2) between 393 and 493 K was studied by single pulse experiments in a temporal analysis of products (TAP) reactor system. The results showed that CO was reversibly adsorbed on the surface of the catalyst and CO2 was formed in an oxidation reaction of CO with lattice oxygen. The fitting of simulated curves to the experimentally observed response curves of the reactant and product was used to determine the kinetic parameters for the different elementary steps of the reaction. The activation energies were 83 kJ•mol－1 for CO desorption and 31 kJ•mol－1 for CO2 desorption. The surface reaction activation energy for CO oxidation by lattice oxygen was 116 kJ/mol.

Key words: temporal analysis of product, CO oxidation, adsorption, kinetic parameter, manganese oxide, octahedral molecular sieve