High-Pressure Vapor-Liquid Equilibrium Data for Systems Involving Carbon Dioxide + Organic Solvent + -Carotene
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- 作者：Gustavo R. Borges ; Alexander Junges ; Elton Franceschi ; Fernanda C. Corazza ; Marcos L. Corazza ; J. Vladimir Oliveira ; Clá ; udio Dariva
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2007
- 出版时间：July 2007
- 年：2007
- 卷：52
- 期：4
- 页码：1437 - 1441
- 全文大小：84K
- 年卷期：v.52,no.4(July 2007)
- ISSN：1520-5134
文摘
This work reports experimental phase equilibrium (transition points) data for the systems CO2 + ethyl acetate,CO2 + ethyl acetate + 
-carotene, and CO2 + ethanol + -carotene at different concentrations of -carotene inthe organic (liquid) solvents. For this purpose, the static synthetic method, using a variable-volume view cell,was employed for obtaining the experimental data in the temperature range from (303 to 343) K and pressuresup to 12 MPa. Vapor-liquid phase transitions were observed as bubble and dew points for all overall compositionsinvestigated. In a general sense, it was experimentally observed that the addition of -carotene leads to negligiblechanges in pressure transition values compared to CO2 + solvent systems. The Peng-Robinson equation of state,with the classical van der Waals quadratic mixing rule, was employed for the thermodynamic modeling of thesystems investigated with a satisfactory agreement between experiment and theory. It was also observed that theinteraction parameters of -carotene/organic solvent and -carotene/CO2 need not be considered for efficientprediction of phase behavior of the ternary systems.
-carotene, and CO2 + ethanol + -carotene at different concentrations of -carotene inthe organic (liquid) solvents. For this purpose, the static synthetic method, using a variable-volume view cell,was employed for obtaining the experimental data in the temperature range from (303 to 343) K and pressuresup to 12 MPa. Vapor-liquid phase transitions were observed as bubble and dew points for all overall compositionsinvestigated. In a general sense, it was experimentally observed that the addition of -carotene leads to negligiblechanges in pressure transition values compared to CO2 + solvent systems. The Peng-Robinson equation of state,with the classical van der Waals quadratic mixing rule, was employed for the thermodynamic modeling of thesystems investigated with a satisfactory agreement between experiment and theory. It was also observed that theinteraction parameters of -carotene/organic solvent and -carotene/CO2 need not be considered for efficientprediction of phase behavior of the ternary systems.