CORRELATION OF LIQUID-LIQUID PHASE-EQUILIBRIA USING THE SAFT EQUATION OF STATE

被引:28
作者
YU, ML [1 ]
CHEN, YP [1 ]
机构
[1] NATL TAIWAN UNIV,DEPT CHEM ENGN,TAIPEI,TAIWAN
关键词
THEORY; APPLICATION; LIQUID-LIQUID EQUILIBRIA; MIXTURES;
D O I
10.1016/0378-3812(94)87055-1
中图分类号
O414.1 [热力学];
学科分类号
摘要
An equation of state (EOS) derived from the statistical associating fluid theory (the SAFT equation of state (EOS), Chapman et al., 1990) is applied to liquid-liquid equilibrium (LLE) calculations of mixtures including self-associating components. The SAFT EOS is employed in this study on 41 binary and eight ternary mixtures which include alkanol, water, carboxylic acid, amine and n-alkane compounds. The temperature dependence of the SAFT EOS behaves satisfactorily in predicting the binodal curves. The binary interaction parameters of the SAFT EOS are found to be a function of molecular weight for families of binary systems. The accuracy of LLE calculations using the SAFT EOS is reported and is compared with that of the UNIFAC model or the Peng-Robinson EOS with van der Waals mixing rules. The SAFT EOS with generalized binary parameters yields superior results to those from other methods.
引用
收藏
页码:149 / 165
页数:17
相关论文
共 17 条
[11]   THEORY OF CLOSED-LOOP LIQUID LIQUID IMMISCIBILITY IN MIXTURES OF MOLECULES WITH DIRECTIONAL ATTRACTIVE FORCES [J].
JACKSON, G .
MOLECULAR PHYSICS, 1991, 72 (06) :1365-1385
[12]   A MODIFIED UNIFAC GROUP-CONTRIBUTION MODEL FOR PREDICTION OF PHASE-EQUILIBRIA AND HEATS OF MIXING [J].
LARSEN, BL ;
RASMUSSEN, P ;
FREDENSLUND, A .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1987, 26 (11) :2274-2286
[13]   UNIFAC PARAMETER TABLE FOR PREDICTION OF LIQUID-LIQUID EQUILIBRIA [J].
MAGNUSSEN, T ;
RASMUSSEN, P ;
FREDENSLUND, A .
INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1981, 20 (02) :331-339
[14]   CORRELATION OF TERNARY LIQUID LIQUID EQUILIBRIA USING A MODIFICATION OF THE WILSON EQUATION [J].
NAGATA, I ;
WATANABE, T .
FLUID PHASE EQUILIBRIA, 1992, 72 :1-14
[15]   A New Two-Constant Equation of State [J].
PENG, D ;
ROBINSON, DB .
INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1976, 15 (01) :59-64
[16]  
SOAVE G, 1993, FLUID PHASE EQUILIBR, V82, P345, DOI 10.1016/0378-3812(93)87158-W
[17]   CALCULATION OF MULTIPHASE EQUILIBRIA BY A GROUP CONTRIBUTION EQUATION OF STATE [J].
SUEN, SY ;
CHEN, YP ;
WONG, DS .
FLUID PHASE EQUILIBRIA, 1989, 52 :75-82