高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (12): 1107.

• 研究论文 • 上一篇    下一篇

H2在Cu/ZnO/Al2O3型低变催化剂上的TPD研究

段雪, 高正中, 王琪   

  1. 北京化工学院
  • 收稿日期:1984-08-28 出版日期:1985-12-24 发布日期:1985-12-24

The TPD Study of H2 from the Cu/ZnO/Al2O3 Catalyst of the Low Temperature Shift Reaction

Duan Xue, Gao Zhengzhong, Wang Qi   

  1. Department of Applied Chemistry, Beijing Institute of Chemical Technology, Beijing
  • Received:1984-08-28 Online:1985-12-24 Published:1985-12-24

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摘要： 采用TPD法研究了H2在Cu/ZnO/Al2O3上的脱附动力学,结果表明在350℃以内,Cu/ZnO/Al2O3对H2显示出具有不同能量特征的两个活泼部位(Ⅰ)、(Ⅱ),借助于脱附速率等温线法对(Ⅰ)、(Ⅱ)进行解析,建立了相应的脱附速率方程,并发现Cu/ZnO/Al2O3对H2的有效表面为非理想表面,(Ⅰ)、(Ⅱ)对有效表面积的贡献分别为27.6%及72.4%。

Abstract: The desorption kinetics of H2 from the Cu/ZnO/Al2O3 catalyst of the low temperature shift reaction has been studied by TPD.It is represented that, for H2, Cu/ZnO/Al2O3 has two active sites (Ⅰ) and (Ⅱ) which have distinct characteristics of energy as the temperature <350℃.The detailed analysis for (Ⅰ) and (Ⅱ) with the desorption rate isotherms method gave the desortion kinetic parameters and determined the desorption rate equations.It was discovered that the effective surface of Cu/ZnO/Al2O3 catalyst is not an ideal surface and the contribution for effective surface area is 27.6% for (Ⅰ) and 72.4% for (Ⅱ).

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