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

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Abstract

In this work the phase behavior of the ternary system ethanol/(±)- menthol/CO2 was studied at the temperatures of 313 and 323 K, in the pressure range 8-10 MPa. 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 313 K and 9 MPa.

Original languageEnglish
Pages (from-to)282-287
Number of pages6
JournalJournal of Supercritical Fluids
Volume92
DOIs
Publication statusPublished - Aug 2014

Keywords

  • (±)-Menthol
  • Ethanol
  • Solubility
  • Supercritical carbon dioxide
  • Vapor-liquid equilibrium

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