Vapor-liquid Phase Equilibria for CO2+Tertpentanol Binary System at Elevated Pressures

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (4): 678-682.

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Vapor-liquid Phase Equilibria for CO₂+Tertpentanol Binary System at Elevated Pressures

WANG Lin^1,2, LUO Jian-cheng³, YANG Hao¹ and CHEN Kai-xun^2*

1. Chemistry and Pharmaceutical Engineering College, Nanyang Normal University, Nanyang 473061, P. R. China;
2. Chemical Engineering College, Northwest University, Xi’an 710069, P. R. China;
3. Chemical Engineering College, Nanyang Institute of Technology, Nanyang 473004, P. R. China

Received:2010-11-17 Revised:2011-03-16 Online:2011-07-25 Published:2011-06-29
Contact: CHEN Kai-xun E-mail:kxchen@nwu.edu.cn
Supported by:
Supported by the Youth Key Teacher Foundation of Henan Educational Committee, China(No.2010GGJS-162).

Abstract

Abstract: Vapor-liquid phase equilibrium data of tertpentanol in carbon dioxide were measured at temperatures of 313.4, 323.4, 333.5 and 343.5 K and in the pressure range of 4.56―11.44 MPa. The phase equilibium apparatus used in the work was a variable-volume high-pressure cell. The experimental data were reasonably correlated with Peng-Robinson equation of state(PR-EOS) together with van der Waals-2 two-parameter mixing rules. Henry’s Law constants and partial molar volumes of CO2 at infinite dilution were estimated with Krichevsky-Kasarnovsky equation, and Henry’s Law constants increase with increasing temperature, however, partial molar volumes of CO2 at infinite dilution are negative whose magnitudes decrease with temperature. Partial molar volumes of CO2 and tertpentanol in liquid phase at equilibrium were calculated.

Key words: Carbon dioxide, Tertpentanol, Phase equilibrium, Henry’s Law constant, Partial molar volume

WANG Lin, LUO Jian-cheng, YANG Hao and CHEN Kai-xun*. Vapor-liquid Phase Equilibria for CO₂+Tertpentanol Binary System at Elevated Pressures[J]. Chemical Research in Chinese Universities, 2011, 27(4): 678-682.

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Vapor-liquid Phase Equilibria for CO₂+Tertpentanol Binary System at Elevated Pressures

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