Critical points of adsorbed phases using a 2D lattice gas equation of state

2006 ◽  
Vol 244 (1) ◽  
pp. 2-10
Author(s):  
Marcelo F. Alfradique ◽  
Papa M. Ndiaye ◽  
Marcelo Castier
Keyword(s):  
Equation Of State ◽  
Critical Points ◽  
Lattice Gas

Equation of State and Phase Transition of the Spherical Lattice Gas

1960 ◽  
Vol 120 (1) ◽  
pp. 22-32 ◽  
Author(s):  
Walter Pressman ◽  
Joseph B. Keller
Keyword(s):  
Phase Transition ◽  
Equation Of State ◽  
Lattice Gas

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.

Vapor–liquid equilibrium data and critical points for the system H2S+COS. Extension of the PSRK group contribution equation of state

2000 ◽  
Vol 170 (2) ◽  
pp. 193-202 ◽  
Author(s):  
Patricia Guilbot ◽  
Pascal Théveneau ◽  
Abdelatif Baba-Ahmed ◽  
Sven Horstmann ◽  
Kai Fischer ◽  
...  
Keyword(s):  
Equation Of State ◽  
Critical Points ◽  
Group Contribution ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Vapor Liquid

Calculation of critical points for multicomponent mixtures containing hydrocarbon and nonhydrocarbon components with the PC-SAFT equation of state

2008 ◽  
Vol 265 (1-2) ◽  
pp. 192-204 ◽  
Author(s):  
Daimler N. Justo-García ◽  
Fernando García-Sánchez ◽  
Nestor L. Díaz-Ramírez ◽  
Ascención Romero-Martínez
Keyword(s):  
Equation Of State ◽  
Critical Points ◽  
Multicomponent Mixtures
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