Determination of the concentration dependence of the second derivative of Gibbs' energy with respect to composition on the basis of vapour-liquid equilibrium data

1981 ◽  
Vol 46 (12) ◽  
pp. 2989-3002 ◽  
Author(s):  
Josef P. Novák ◽  
Jaroslav Matouš ◽  
Josef Šobr ◽  
Jiří Pick
Keyword(s):  
Gibbs Energy ◽  
Concentration Dependence ◽  
Binary Systems ◽  
Second Derivative ◽  
Liquid Equilibrium ◽  
Equilibrium Data

The course of the second derivative of Gibbs' energy with respect to composition for binary systems is evaluated. The representation of this quantity in terms of different correlation relations (the Wilson, NRTL and UNIQUAC equations and the ASOG and UNIFAC methods) is also discussed.

Effect of the course of the second derivative of Gibbs' energy in binary mixtures on the liquid-liquid equilibrium in ternary system

1981 ◽  
Vol 46 (12) ◽  
pp. 3003-3017
Author(s):  
Josef P. Novák ◽  
Jaroslav Matouš ◽  
Josef Šobr ◽  
Jiří Pick
Keyword(s):  
Gibbs Energy ◽  
Ternary System ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Second Derivative ◽  
Curve Shape ◽  
Liquid Equilibrium ◽  
Model Calculations ◽  
Tie Lines ◽  
Heterogeneous Region

The effect of the course of G11(x1) in binary systems is studied on the binodal curve shape, the extent of heterogeneous region and the inclination of tie-lines in the ternary system. The effect of individual quantities is shown both on model calculations and on the systems acetonitrile-benzene-n-heptane, water-benzene-ethanol and water-benzene-2-propanol. The UNIQUAC and the modified Wilson equations were employed for calculating.

Vapour-liquid equilibrium in the binary systems formed by ethylene glycol, diethylene glycol, and N-methylpyrrolidone

1989 ◽  
Vol 54 (11) ◽  
pp. 2856-2862 ◽  
Author(s):  
Július Surový ◽  
Elena Graczová ◽  
Jana Ovečková
Keyword(s):  
Gibbs Energy ◽  
Ethylene Glycol ◽  
Diethylene Glycol ◽  
Excess Gibbs Energy ◽  
Binary Systems ◽  
Ideal Solution ◽  
Liquid Equilibrium ◽  
Equilibrium Data ◽  
Foregoing Paper ◽  
Wilson And Nrtl Equations

Vapour-liquid equilibrium data are given for the binary systems ethylene glycol (EG)-N-methylpyrrolidone (NMP), ethylene glycol-diethylene glycol (DEG), and N-methylpyrrolidone-diethylene glycol at 50°C. The measurement of vapour-liquid equilibrium was carried out in a modified version of semimicrostill from foregoing paper. This still makes it possible to measure even at the pressures of the order 101 Pa. The dependence of the excess Gibbs energy on composition was expressed by the 4th order Redlich-Kister, Wilson, and NRTL equations. The systems EG-NMP and DEG-NMP exhibit negative deviations from ideal behaviour, EG with DEG form practically ideal solution.

Isobaric Low-Pressure Vapor–Liquid Equilibrium Data for Ethylbenzene + Styrene + Sulfolane and the Three Constituent Binary Systems

2011 ◽  
Vol 56 (9) ◽  
pp. 3510-3517 ◽  
Author(s):  
Mark T. G. Jongmans ◽  
Jenny I. W. Maassen ◽  
Adriaan J. Luijks ◽  
Boelo Schuur ◽  
André B. de Haan
Keyword(s):  
Binary Systems ◽  
Low Pressure ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Constituent Binary ◽  
Vapor Liquid
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