Phase Equilibrium of Isobutanol in Supercritical CO2

CIESC Journal ›› 2009, Vol. 17 ›› Issue (4): 642-647.

Phase Equilibrium of Isobutanol in Supercritical CO₂

王琳¹, 郝小松², 郑岚¹, 陈开勋¹

1. Chemical Engineering College, Northwest University, Xi'an 710069, China;
2. Chemistry and Pharmaceutical Engineering College, Nanyang Normal University, Nanyang 473061, China

收稿日期:2008-12-23 修回日期:2009-04-16 出版日期:2009-08-28 发布日期:2010-12-30
通讯作者: CHEN Kaixun, E-mail: kxchen@nwu.edu.cn
作者简介:
基金资助:

Phase Equilibrium of Isobutanol in Supercritical CO₂

WANG Lin¹, HAO Xiaosong², ZHENG Lan¹, CHEN Kaixun¹

1. Chemical Engineering College, Northwest University, Xi'an 710069, China;
2. Chemistry and Pharmaceutical Engineering College, Nanyang Normal University, Nanyang 473061, China

Received:2008-12-23 Revised:2009-04-16 Online:2009-08-28 Published:2010-12-30
Supported by:

摘要/Abstract

摘要： Vapor-liquid phase equilibrium data including composition,densities,molar volume and equilibrium constant of isobutanol in supercritical carbon dioxide from 313.2K to 353.2K were measured in a variable-volume visual cell.The properties of critical point were obtained by extrapolation.The results showed that critical temperature,critical pressure and critical compressibility factor of CO²-isobutanol system decreased with the increase of critical COM² content.The phase equilibrium model was established by Peng-Robinson equation of state and van der Waals-2 mixing regulation,and model parameters were determined by optimization calculation of nonlinear least square method.The correlation between calculated values and the experimental data showed good agreement.

关键词: supercritical carbon dioxide, isobutanol, phase equilibrium model, critical property

Abstract: Vapor-liquid phase equilibrium data including composition,densities,molar volume and equilibrium constant of isobutanol in supercritical carbon dioxide from 313.2K to 353.2K were measured in a variable-volume visual cell.The properties of critical point were obtained by extrapolation.The results showed that critical temperature,critical pressure and critical compressibility factor of CO²-isobutanol system decreased with the increase of critical COM² content.The phase equilibrium model was established by Peng-Robinson equation of state and van der Waals-2 mixing regulation,and model parameters were determined by optimization calculation of nonlinear least square method.The correlation between calculated values and the experimental data showed good agreement.

Key words: supercritical carbon dioxide, isobutanol, phase equilibrium model, critical property

王琳, 郝小松, 郑岚, 陈开勋. Phase Equilibrium of Isobutanol in Supercritical CO₂[J]. CIESC Journal, 2009, 17(4): 642-647.

WANG Lin, HAO Xiaosong, ZHENG Lan, CHEN Kaixun. Phase Equilibrium of Isobutanol in Supercritical CO₂[J]. , 2009, 17(4): 642-647.

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Phase Equilibrium of Isobutanol in Supercritical CO₂

Phase Equilibrium of Isobutanol in Supercritical CO₂

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