化学学报 ›› 1995, Vol. 53 ›› Issue (6): 557-562. 上一篇    下一篇

研究论文

分子连接性指数与溶液吸附自由能的相关性

赵振国   

  1. 北京大学化学系
  • 出版日期:1995-06-15 发布日期:1995-06-15

The relationship and molecular connectivity indes to changes of standard free energy in adsorption processes

ZHAO ZHENGUO   

  • Online:1995-06-15 Published:1995-06-15

测定了硅胶自四氯化碳中吸附脂肪醇及活性炭自水中吸附芳香化合物的吸附等温线, 等温线均可用Langmuir方程描述。利用Langmuir参数计算了各体系的吸附标准自由能变化。计算了各种吸附质的分子连接性指数。各种分子的分子连接性指数与吸附标准自由能变化间有相关性, 并给出了相关方程, 同时作了初步的讨论。

关键词: 吸附, 自由能, 硅胶, 分子连接性指数

The adsorption isotherms of aliphatic alcohols from carbon tetrachloride onto silica gel, of some aromatic compounds from water onto active carbon have been determined. The isotherms can be represented by the Langmuir equation. The changes of standard free energy (△G°) in adsorption processes have been calculated from the Langmuir parameters. The relation-ship of the molecular connectivity index to the △G° was tested. The results show, that the molecular connectivity model is a accurate predictive tool for the adsorption properties of organic compounds in the certain condition.

Key words: ADSORPTION, FREE ENERGY, SILICA GEL

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