物理化学学报 >> 1994, Vol. 10 >> Issue (08): 698-703.doi: 10.3866/PKU.WHXB19940806

研究论文 上一篇    下一篇

用常温正丁烷异构化反应表征固体超强酸性

高滋, 陈建民, 唐颐, 华伟明   

  1. 复旦大学化学系，上海 200433
  • 收稿日期:1993-04-09 修回日期:1993-08-09 发布日期:1994-08-15
  • 通讯作者: 高滋

Characterization of Solid Superacidity by Butane Isomerization Reaction at Ambient Temperature

Gao Zi, Chen Jian-Min, Tang Yi, Hua Wei-Ming   

  1. Department of Chemistry, Fudan University, Shanghai 200433
  • Received:1993-04-09 Revised:1993-08-09 Published:1994-08-15
  • Contact: Gao Zi

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摘要：

研究了室温下固体超强酸催化剂上正丁烷反应，发现转化率低于50％时，异构化选择性高于95％，正丁烷异构化反应动力学符合一级可逆反应规律，固体超强酸的酸强度与正丁烷异构化反应转化率和速率常数呈顺变关系，与反应表现活化能呈逆变关系．报出了一种新的表征固体超强酸性的实验方法．

关键词: SO2-4/ZrO2体系, 固体超强酸, 正丁烷异构化反应, 超强酸性表征

Abstract:

Butane reactions on SO~(2-)_4/ZrO_2 type solid superacids at ambient temperature were studied. The butane isomerization selectivity is higher than 95% while the total reaction conversion is lower than 50%. The rate of the butane isomerization reaction follows the rate law of a first-order reversible reaction. The reaction conversion, rate constant and activation energy of the isomerization reaction are dependent on the superacidity of the solid catalysts. As the H_o of the catalysts is increased, the reaction conversion and rate constant are increased and the activation energy is decreased. The butane isomerization at ambient temperature is a good probe reaction for the characterization of solid superacidity.

Key words: SO2-4/ZrO2 system, Solid superacid, Butane isomerization, Characterization of superacidity