In this paper experimental equilibrium data on the
system supercritical CO2-orange essential oil and the system supercritical
CO2-linalool are reported at 323.15 K and 343.15 K, for pressures in
the ranges of 7.6-13.5 MPa. The behavior of the system supercritical CO2-orange
essential oil was represented by means of thermodynamic model, based on Peng-Robinson
equation of state. To this aim the orange essential oil was represented by a
mixture of limonene, linalool and β-caryophyllene,
selected to represent the classes of monoterpenes, oxygenated terpenes and
sesquiterpenes respectively. The model uses only regression parameters
calculated from binary sub-systems, CO2-limonene and CO2-β-caryophyllene (taken from literature)
and CO2-linalool (calculated from the fitting of original data
reported in the present work) thus being predictive with respect to the
multicomponent mixture.
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