AN EQUATION FOR THE EXCESS GIBBS ENERGY OF EXPANDABLE LIQUID MIXTURES

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

TAKASHI NAKAYAMA²  HIROSHI SAGARA²  KUNIO ARAI¹  SHOZABURO SAITO¹ 

[1] Department of Chemical Engineering, Tohoku University;Research & Development Div., JGC Corporation

关键词: Solution Model;    Liquid-Liquid Equilibrium;    Excess Gibbs Energy;    Close-Packed Solution;    Expanded Solution;   

DOI  :  10.1252/jcej.21.509

来源: Maruzen Company Ltd

【 摘 要 】

References(25)Cited-By(1)An expression for the excess Gibbs energy of expandable liquid mixtures, such as liquefied gas mixtures, is obtained by considering the effect of molar volume change on the structure of a solution. A new equation is derived through the introduction of two limiting states: the close-packed and hypothetical expanded states. From this model, the deviation of the excess Gibbs energy from the close-packed state is determined by hole fraction and solution structure parameter. The model, which requires only binary parameters, was tested on vapor-liquid and liquid-liquid equilibria of various mixtures including liquefied gas mixtures, and gave better data representation than the UNIQUAC model.

【 授权许可】

Unknown