Vapor−Liquid Equilibrium (VLE) Data for the Carbon Dioxide (CO2) + 1,1,1,2-Tetrafluoroethane (R134a) System at Temperatures from 252.95 K to 292.95 K and Pressures up to 2 MPa

2002 ◽  
Vol 47 (1) ◽  
pp. 59-61 ◽  
Author(s):  
C. Duran-Valencia ◽  
G. Pointurier ◽  
A. Valtz ◽  
P. Guilbot ◽  
D. Richon
Keyword(s):  
Carbon Dioxide ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vle Data ◽  
Carbon Dioxide Co2 ◽  
Vapor Liquid

scholarly journals Vapor-Liquid Equilibrium of Carbon Dioxide + Ethanol: Experimental Measurements with Acoustic Method and Thermodynamic Modeling

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Ana Mehl ◽  
Fabio P. Nascimento ◽  
Pedro W. Falcão ◽  
Fernando L. P. Pessoa ◽  
Lucio Cardozo-Filho
Keyword(s):  
Carbon Dioxide ◽  
Equations Of State ◽  
Acoustic Method ◽  
Ultra Sound ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Acoustic Methods ◽  
Vle Data ◽  
Good Agreement ◽  
Vapor Liquid

Phase behavior of systems composed by supercritical carbon dioxide and ethanol is of great interest, especially in the processes involving supercritical extraction in which ethanol is used as a cosolvent. The development of an apparatus, which is able to perform the measurements of vapor-liquid equilibrium (VLE) at high pressure using a combination of the visual and the acoustic methods, was successful and was proven to be suited for determining the isothermal VLE data of this system. The acoustic method, based on the variation of the amplitude of an ultra-sound signal passing through a mixture during a phase transition, was applied to investigate the phase equilibria of the system carbon dioxide + ethanol at temperatures ranging from 298.2 K to 323.2 K and pressures from 3.0 MPa to 9.0 MPa. The VLE data were correlated with Peng-Robinson equation of state combined with two different mixing rules and the SAFT equations of state as well. The compositions calculated with the models are in good agreement with the experimental data for the isotherms evaluated.

Experimental Vapor–Liquid Equilibrium for the Quaternary Carbon Dioxide + Ethanol + Thiophene + Pentane/Nonane Systems

2012 ◽  
Vol 57 (10) ◽  
pp. 2896-2901 ◽  
Author(s):  
Verónica Serrano-Cocoletzi ◽  
Luis A. Galicia-Luna ◽  
Octavio Elizalde-Solis
Keyword(s):  
Carbon Dioxide ◽  
Quaternary Carbon ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid
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