高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (1): 10.

• 研究论文 • 上一篇    下一篇

超临界二氧化碳二元体系相平衡性质的研究

张敬畅, 吴向阳, 曹维良   

  1. 北京化学工业大学理学院应用化学系, 北京 100029
  • 收稿日期:2000-12-28 出版日期:2002-01-24 发布日期:2002-01-24
  • 通讯作者: 曹维良(1943年出生),男,硕士,教授,从事物理化学研究.
  • 基金资助:

    国家自然科学基金(批准号:20076004);教育部博士学科点基金(批准号:2000001005)资助

Phase Equilibrium Properties of Supercritical Carbon Dioxide in Binary System

ZHANG Jing-Chang, WU Xiang-Yang, CAO Wei-Liang   

  1. Department of Applied Chemistry, College of Sciences, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2000-12-28 Online:2002-01-24 Published:2002-01-24

PDF (PC)

被引次数

52

摘要： 采用固定体积可视观察法测定了CO2+甲苯、CO2+环己烷、CO2+正丁醛、CO2+异丁醛、CO2+甲醇及CO2+乙醇二元体系的临界点性质,为超临界萃取和化学反应提供基础数据.在对二元体系相行为与单组分超临界相行为进行比较的基础上,对不同化学物质及不同配比的二元体系临界点与二氧化碳临界点之间的关系进行了讨论.

关键词: 第二组分, 临界点, 二元体系

Abstract: The Performance of supercritical fluid (SCF) as a solvent can be greatly affected by addition of an entrainer to the system. In this study, the constant volume visual method is used to measure the critical point properties of CO2+ toluene, CO2+ cyclohexane, CO2+ n-butyraldehyde, CO2+ i-butyraldehyde, CO2+ methanol and CO2+ ethanol binary systems. These properties provide a good basis for supercritical extraction and chemical reaction. The relationship between the critical point of CO2+ entrainer binary system and the critical point of supercritical carbon dioxide has been discussed. The phase behavior of single component system has been compared to that of CO2+ entrainer binary systems.

Key words: Entrainer, Critical point, Binary system

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