高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (11): 1011.

• 研究论文 • 上一篇    下一篇

CO2在Cu/ZnO/Al2O3型低变催化剂上的TPD研究

段雪, 王琪   

  1. 北京化工学院应用化学系
  • 收稿日期:1985-03-25 出版日期:1986-11-24 发布日期:1986-11-24
  • 基金资助:

    中国科学院科学基金

The TPD Study of CO2 From the Cu/ZnO/Al2O3 Catalyst for the Low Temperature Shift Reaction

Duan Xue, Wang Qi   

  1. Department of Applied Chemistry, Beijing Institute of Chemical Technology, Beijing
  • Received:1985-03-25 Online:1986-11-24 Published:1986-11-24

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摘要： 本文采用程序升温脱附(TPD)法研究了CO2在Cu/ZnO/Al2O3型低变催化剂上的吸、脱附行为。结果表明:在350℃以内,该催化剂对于CO2显示出一种能量分布的活泼部位,且其主要是由催化剂中的游离ZnO所提供。以Tf法结合脱附速率等温线法进行了TPD谱图的定量解析,求出了脱附动力学参数,并发现Cu/ZnO/Al2O3对CO2的有效表面为非理想表面,CO2在Cu/ZnO/Al2O3上的脱附近似地服从一级过程。最后针对得到的Arrhenius图进行了有关的讨论。

Abstract: The desorption kinetics of CO2 from the Cu/ZnO/Al2 O3 catalyst for the low temperature shift reaction is studied by temperature programmed desorption(TPD).The Tf method of analyzing the complex TPDspectra is put forward and a count problem about the surface coverage θ in the complex TPDspectra is solved.The detailed analysis of the complex TPDspectra,with the method of T1 and desorption rate isotherms,gives the desorption kinetic parameters and determines the desorption rate equation.It is represented that the effective surface of the catalyst about CO2 is not an ideal surface.And it is also found that the desorption of CO2 from the catalyst is followed a first order process.The Arrhenius graph,lastly,is discussed.

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