高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (7): 1416.

• 研究论文 • 上一篇    下一篇

CO2与2-丁醇二元系统的高压相平衡模型

王琳1, 罗建成2, 李入林2, 陈开勋3   

  1. 1. 南阳师范学院化学与制药工程学院, 南阳 473061;
    2. 南阳理工学院化工与生化学院, 南阳 473004;
    3. 西北大学化工学院, 西安 710069
  • 收稿日期:2009-09-23 出版日期:2010-07-10 发布日期:2010-07-10
  • 通讯作者: 王琳, 女, 博士, 副教授, 主要从事超临界流体技术及相关研究. E-mail: yueyuewanglin@163.com

High Pressure Phase Equilibrium Model of 2-Butanol in CO2

WANG Lin1*, LUO Jian-Cheng2, LI Ru-Lin2, CHEN Kai-Xun3   

  1. 1. Chemistry and Pharmaceutical Engineering College, Nanyang Normal University, Nanyang 473061, China;
    2. Chemical and Biochemical Engineering College, Nanyang Institute of Technology, Nanyang 473004, China;
    3. Chemical Engineering College, Northwest University, Xi′an 710069, China
  • Received:2009-09-23 Online:2010-07-10 Published:2010-07-10
  • Contact: WANG Lin. E-mail: yueyuewanglin@163.com

摘要:

采用固定体积可视观察法测定了在323.2~353.2 K温度范围内2-丁醇在CO2中高压相平衡数据. 运用Peng-Robinson状态方程(PR)和van der Waals-2混合规则建立了相平衡模型, 并运用Chrastil半经验方程建立了溶解度方程. 通过优化计算得到了状态方程中的模型参数, 同时得到的Chrastil溶解度方程为c=ρ3.3617·exp(-2198.8193/T+6.5545). 二元体系的溶解热为-18.2809 kJ/mol.

关键词: 超临界二氧化碳; 2-丁醇; 相平衡模型; 状态方程法; 溶解度方程; Chrastil半经验方程

Abstract:

High pressure vapor-liquid phase equilibrium data of 2-butanol in CO2 from 323.2 K to 353.2 K were measured by constant-volume visual method. The phase equilibrium model was established by Peng-Robinson equation of state together with van der Waals-2 mixing rule. The solubility equation was correlated by Chrastil semi-empirical equation. Model parameters were calculated by least-squares optimization procedure. The solubility equation obtained was c=ρ3.3617·exp(-2198.8193/T+6.5545), and the solubility heat of the system was -18.2809 kJ/mol.

Key words: Supercritical carbon dioxide; 2-Butanol; Phase equilibrium model; Equation of state; Solubility equation; Chrastil semi-empirical equation

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