DESCRIBING VAPOR-LIQUID-EQUILIBRIA IN METHANOL PLUS N-ALKANE SYSTEMS BY MEANS OF AN EQUATION OF STATE WITH ASSOCIATION

被引：2

作者：

VONKA, P ^{[1
]}

LOVLAND, J ^{[1
]}

PROKES, T ^{[1
]}

机构：

[1] NORWEGIAN INST TECHNOL,DEPT CHEM ENGN,N-7034 TRONDHEIM,NORWAY

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 1995年 / 16卷 / 01期

关键词：

ASSOCIATION; EQUATION OF STATE; FALSE LIQUID-LIQUID SPLIT; METHANOL + N-ALKANE SYSTEMS; MIXING RULE; VAPOR-LIQUID EQUILIBRIUM;

D O I：

10.1007/BF01438973

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The ability of an equation of state incorporating association to describe vapor-liquid equilibrium of methanol + n-alkane systems has been tested. An equation of state with association is divided into ''physical'' and ''chemical'' parts, where the Patel-Teja cubic equation of state is used for the description of the physical part and an association term forms the chemical part. Five two- and three-parameter mixing rules were tested and compared with an equation of state without association. On the average for the first eight n-alkanes, the improvement in fit of pressure using association was 30-50% and the calculated vapor compositions were also much improved. In addition, there were fewer points with unstable liquid phase (false liquid-liquid split). Both with and without association, density-dependent mixing rules based on a local-composition concept gave the best result.

引用

页码：227 / 236

页数：10

共 27 条

[1] A SIMPLE EQUATION OF STATE INCORPORATING ASSOCIATION [J].

ANDERKO, A .

FLUID PHASE EQUILIBRIA, 1989, 45 (01) :39-67

[2]

ANDERKO A, 1991, AICHE J, V37, P794

[3]

Budantseva L. S., 1975, ZH FIZ KHIM, V49, P260

[4]

BUDANTSEVA LS, 1975, ZH FIZ KHIM, V49, P1848

[5]

BUDANTSEVA LS, 1975, ZH FIZ KHIM, V49, P1844

[6] VAPOR-LIQUID-EQUILIBRIA AND CRITICAL PHENOMENA IN METHANOL + N-ALKANE SYSTEMS [J].

DELOOS, TW ;

POOT, W ;

ARONS, JD .

FLUID PHASE EQUILIBRIA, 1988, 42 :209-227

[7] ESTIMATION OF BINARY INTERACTION PARAMETERS FOR EQUATIONS OF STATE SUBJECT TO LIQUID-PHASE STABILITY REQUIREMENTS [J].

ENGLEZOS, P ;

KALOGERAKIS, N ;

BISHNOI, PR .

FLUID PHASE EQUILIBRIA, 1989, 53 :81-88

[8]

FRANCIS AF, 1961, CRITICAL SOLUTION TE, P115

[9]

GALIVELSOLASTIO.F, 1986, FLUID PHASE EQUILIBR, V28, P73

[10] (LIQUID+LIQUID) PHASE-EQUILIBRIA IN (METHANOL+BUTANE) AND (METHANOL+PENTANE) AT PRESSURES FROM 0.1 TO 140 MPA [J].

HAARHAUS, U ;

SCHNEIDER, GM .

JOURNAL OF CHEMICAL THERMODYNAMICS, 1988, 20 (10) :1121-1129

← 1 2 3 →