High pressure vapor–liquid equilibrium for the ternary system ethanol/(±)-menthol/carbon dioxide

•VLE of the ethanol/(±)-menthol/CO2 ternary system at 313 and 323K and 8–10MPa.•CO2 is more selective towards ethanol with separation factors from 1.6 to 7.6.•The PR-MKP EOS was able to accurately correlate experimental data. In this work the phase behavior of the ternary system ethanol/(±)-menthol/...

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Bibliographic Details
Published in:The Journal of supercritical fluids 2014-08, Vol.92, p.282-287
Main Authors: Rebocho, Sílvia, Nunes, Ana V.M., Najdanovic-Visak, Vesna, Barreiros, Susana, Simões, Pedro, Paiva, Alexandre
Format: Article
Language:English
Subjects:
(±)-Menthol
Ethanol
Solubility
Supercritical carbon dioxide
Vapor–liquid equilibrium
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Summary:•VLE of the ethanol/(±)-menthol/CO2 ternary system at 313 and 323K and 8–10MPa.•CO2 is more selective towards ethanol with separation factors from 1.6 to 7.6.•The PR-MKP EOS was able to accurately correlate experimental data. In this work the phase behavior of the ternary system ethanol/(±)-menthol/CO2 was studied at the temperatures of 313 and 323K, in the pressure range 8–10MPa. Experiments were performed using a high pressure phase equilibrium apparatus with a visual cell. CO2 is more selective toward ethanol, separation factors ranging from 1.6 to 7.6 at the conditions tested. The pTxy data obtained were correlated with the Peng–Robinson equation of state combined with the Mathias–Klotz–Prausnitz mixing rule. The model gave a good fitting to the data, with a total average absolute deviation of 3.7%, and was able to predict the occurrence of a three-phase region observed experimentally at 313K and 9MPa.
ISSN:0896-8446
1872-8162
DOI:10.1016/j.supflu.2014.06.006