Phase behavior for carbon dioxide+ethanol system: Experimental measurements and modeling with a cubic equation of state

Secuianu, Catinca; Feroiu, Viorel; Geană, Dan

doi:10.1016/j.supflu.2008.08.004

Cited by 129 publications

(102 citation statements)

References 40 publications

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“…Supercritical fluid extraction processes for selectively recovering high purity active principles from biological substrates is a technology of interest to the food, cosmetics, and pharmaceutical industries [1,2]. Carbon dioxide (CO 2 ) is the most commonly used supercritical fluid.…”

Section: Introductionmentioning

confidence: 99%

“…For the (CO 2 + ethanol) binary system, experimental high-pressure (vapour + liquid) equilibria (VLE) data have been extensively reported at temperatures from (283 to 373) K and pressure range of (0.5 to 14.3) MPa by several authors [2,[6][7][8][9]. Experimental information selected from the literature for the high-pressure VLE of the four systems measured in this contribution: (CO 2 + 1-propanol) [6,[10][11][12][13], (CO 2 + 2-methyl-1-propanol) [14][15][16], (CO 2 + 3-methyl-1-butanol) [14,[16][17][18], and (CO 2 + 1-pentanol) [19][20][21][22] is summarized in table 1.…”

Section: Introductionmentioning

confidence: 99%

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Measurement and modeling of high-pressure (vapour+liquid) equilibria of (CO2+alcohol) binary systems

Gutiérrez

Bejarano

Fuente

2010

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement and modeling of high-pressure (vapour+liquid) equilibria of (CO2+alcohol) binary systems

Gutiérrez

Bejarano

Fuente

2010

The Journal of Chemical Thermodynamics

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“…Outside this VLE region only single phase can exist, either in liquid-liquid, vapour-vapour or supercritical-liquid form (Smith et al 2000). P-T-x-y data of VLE for both sets of fluids were obtained from several authors (Secuianu et al 2008;Joung et al 2001;Jennings et al 1991;Suzuki et al 1990;Galicia-Luna et al 2000;Brunner et al 1987;Ohgaki and Katayama 1976;Bezanehtak et al 2002;Leu et al 1991;Mendoza de la Cruz and Galicia-Luna 1999;Tian et al 2001). These data allowed the estimation of the mass composition of the working mixtures (see Sect.…”

Section: Phase Behaviour Of Mixturesmentioning

confidence: 99%

Flow of CO2–ethanol and of CO2–methanol in a non-adiabatic microfluidic T-junction at high pressures

Ojea¹,

Tiggelaar²,

Pallarès

et al. 2012

Microfluid Nanofluid

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In this work, an experimental investigation of the single-and multiphase flows of two sets of fluids, CO 2 -ethanol and CO 2 -methanol, in a non-adiabatic microfluidic T-junction is presented. The operating conditions ranged from 7 to 18 MPa, and from 294 to 474 K. The feed mass fraction of CO 2 in the mixtures was 0.95 and 0.87, respectively. Under these operating conditions, CO 2 was either in liquid, gas or supercritical state; and the mixtures experienced a miscible single phase or a vapour-liquid equilibrium (VLE), with two separated phases. Taylor, annular and wavy were the two-phase flow regimes obtained in the VLE region. In the single phase region, the observed flows were classified into standard single-phase flows, ''pseudo'' two-phase flows and local phenomena in the T-junction. Flow regime maps were generated, based on temperature and pressure conditions. Two-phase flow void fractions and several parameters of Taylor flow were analysed. They showed a clear dependency on temperature, but were mostly insensitive to pressure. A continuous accumulation of liquid, either in the CO 2 channel or at the CO 2 -side wall after the T-junction, disturbed most of the experiments in VLE conditions by randomly generating liquid plugs. This phenomenon is analysed, and capillary and wetting effects due to local Marangoni stresses are suggested as possible causes.

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“…Many experimental and theoretical studies have focused on the phase equilibria of CO 2 -methanol and CO 2 -ethanol mixtures [2][3][4][5][6][7][8][9][10][11]. In most of the theoretical studies, semiempirical EOS such as Peng-Robinson EOS and Patel-Teja EOS were used to model the p-x diagrams [3][4][5][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the interfacial properties for CO2-methanol and CO2-ethanol mixtures

2011

Sci. China Chem.

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An equation of state (EOS) applicable for the interfacial properties of CO 2 -methanol and CO 2 -ethanol mixtures was established by combining the cross-association EOS and the density gradient theory (DGT). The correlated surface tensions of CO 2 -ethanol mixtures agreed well with the experimental data. The results illustrated the temperature and pressure dependence of the cross-association between CO 2 and alcohol hydroxyls in the whole vapor-liquid surface, and the influence of the cross-association on the calculation of the surface tensions of binary mixtures.

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Phase behavior for carbon dioxide+ethanol system: Experimental measurements and modeling with a cubic equation of state

Cited by 129 publications

References 40 publications

Measurement and modeling of high-pressure (vapour+liquid) equilibria of (CO2+alcohol) binary systems

Measurement and modeling of high-pressure (vapour+liquid) equilibria of (CO2+alcohol) binary systems

Flow of CO2–ethanol and of CO2–methanol in a non-adiabatic microfluidic T-junction at high pressures

Investigation of the interfacial properties for CO2-methanol and CO2-ethanol mixtures

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