Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide

高等学校化学研究 ›› 2003, Vol. 19 ›› Issue (1): 80-84.

Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide

ZHANG Jing-chang, LIU Kang, CAO Wei-liang

Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China

收稿日期:2001-12-19 出版日期:2003-01-24 发布日期:2011-08-06
基金资助:
Supported by the National Natural Science Foundation of China(No.20076004) and the Research Fund for the Doctoral Pragram of Higher Education(No.2000001005).

Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide

ZHANG Jing-chang, LIU Kang, CAO Wei-liang

Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Received:2001-12-19 Online:2003-01-24 Published:2011-08-06
Supported by:
Supported by the National Natural Science Foundation of China(No.20076004) and the Research Fund for the Doctoral Pragram of Higher Education(No.2000001005).

摘要/Abstract

摘要： A new expression of mixing rule is suggested according to the Mayson′s mixing rule in this paper, which adopts the Redlich-Kwong cubic equation of state and the modified Chueh-Prausnitz method to calculate the experiment critical points of six binary mixtures CO₂+ toluene, CO₂+ cyclohexane, CO₂+ n-butanal, CO₂+ i-butanal, CO₂+ methanol, CO₂+ ethanol. The coefficients of interaction parameter in the expression of mixing rule were optimized from experimental data. The calculated results of critical temperature and critical pressure meet the experiment data well. The maximum relative errors of temperature and pressure between the calculation results and experiment data are 1.493% and 5.2236% respectively, indicating that the proposed expression of mixing rule is reasonable. This may provide a fundamental method for studying and predicting the properties of supercritical fluids.

关键词: Supercritical fluid, Critical properties, Binary system, Carbon dioxide

Abstract: A new expression of mixing rule is suggested according to the Mayson′s mixing rule in this paper, which adopts the Redlich-Kwong cubic equation of state and the modified Chueh-Prausnitz method to calculate the experiment critical points of six binary mixtures CO₂+ toluene, CO₂+ cyclohexane, CO₂+ n-butanal, CO₂+ i-butanal, CO₂+ methanol, CO₂+ ethanol. The coefficients of interaction parameter in the expression of mixing rule were optimized from experimental data. The calculated results of critical temperature and critical pressure meet the experiment data well. The maximum relative errors of temperature and pressure between the calculation results and experiment data are 1.493% and 5.2236% respectively, indicating that the proposed expression of mixing rule is reasonable. This may provide a fundamental method for studying and predicting the properties of supercritical fluids.

Key words: Supercritical fluid, Critical properties, Binary system, Carbon dioxide

ZHANG Jing-chang, LIU Kang, CAO Wei-liang. Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide[J]. 高等学校化学研究, 2003, 19(1): 80-84.

ZHANG Jing-chang, LIU Kang, CAO Wei-liang. Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide[J]. Chemical Research in Chinese Universities, 2003, 19(1): 80-84.

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Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide

Theoretical Studies on Critical Properties of Binary System with Supercritical Carbon Dioxide

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