Equation of state mixing rule for nonideal mixtures using available activity coefficient model parameters and that allows extrapolation over large ranges of temperature and pressure

1992 ◽  
Vol 31 (8) ◽  
pp. 2033-2039 ◽  
Author(s):  
David S. H. Wong ◽  
Hasan Orbey ◽  
Stanley I. Sandler
Keyword(s):  
Equation Of State ◽  
Activity Coefficient ◽  
Model Parameters ◽  
Mixing Rule ◽  
Activity Coefficient Model ◽  
Temperature And Pressure ◽  
Nonideal Mixtures ◽  
State Mixing

scholarly journals Experimental measurement and modelling of vapour-liquid equilibrium data for the C2F4-C3F6-s-C4F8 system

2011 ◽  
Vol 30 (1) ◽  
Author(s):  
Francois J. Conradie
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Binary System ◽  
Activity Coefficient ◽  
Mixing Rule ◽  
Liquid Equilibrium ◽  
Activity Coefficient Model ◽  
Equilibrium Data ◽  
Robinson Equation ◽  
Alpha Function

The vapour-liquid equilibrium data for the C2F4-C3F6-s-C4F8 system are presented. Each binary system was evaluated at three isotherms. The experimental data will be correlated to the Peng-Robinson equation of state, incorporating the Mathias-Copeman alpha function, with the Wong-Sandler mixing rule utilising the NRTL activity coefficient model.

Representation and Prediction of Vapor–Liquid Equilibrium Using the Peng–Robinson Equation of State and UNIQUAC Activity Coefficient Model

2016 ◽  
Vol 55 (4) ◽  
pp. 1088-1101 ◽  
Author(s):  
Younas Dadmohammadi ◽  
Solomon Gebreyohannes ◽  
Agelia M. Abudour ◽  
Brian J. Neely ◽  
Khaled A. M. Gasem
Keyword(s):  
Equation Of State ◽  
Activity Coefficient ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Activity Coefficient Model ◽  
Robinson Equation ◽  
Vapor Liquid

scholarly journals Drawing PT-phase envelopes and calculating critical points for multicomponent systems using flash calculations

2020 ◽  
Vol 15 (1) ◽  
pp. 46-54
Author(s):  
L. A. Toro
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Critical Points ◽  
Isopropyl Alcohol ◽  
Equations Of State ◽  
Mixing Rules ◽  
Mixing Rule ◽  
Multicomponent Systems ◽  
Activity Coefficient Model ◽  
Robinson Equation

Objectives. This study aims to draw PT-phase envelopes and calculate the critical points for multicomponent systems using flash calculations.Methods. Flash calculations with an equation of state and a mixing rule were used to construct phase envelopes for multicomponent systems. In general, the methodology uses the Soave–RedlichKwong equation of state and Van der Waals mixing rules; and the Peng–Robinson equation of state with Wong–Sandler mixing rules and the non-random two-liquid activity coefficient model.Results. The method was applied to the following mixtures: ethane (1)–butane (2) (four different compositions); ethane (1)–propane (2) (four different compositions); butane (1)–carbon dioxide (2) (three different compositions); C2C3C4C5C6 (one composition); isobutane–methanol–methyl tertbutyl ether–1-butene (one composition); and propylene–water–isopropyl alcohol–diisopropyl ether (one composition).Conclusions. Our results agreed to a large extent with the experimental data available in the literature. For mixtures that contained CO2 , the best results were obtained using the PengRobinson equation of state and the Wong–Sandler mixing rules. Our methodology, based on flash calculations, equations of state, and mixing rules, may be viewed as a shortcut procedure for drawing phase envelopes and estimating critical points of multicomponent systems.

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