Supercritical Equilibrium Data of the Systems Carbon Dioxide—Linalool and Carbon Dioxide—Orange Essential Oil

Claudio Capparucci, Sara Frattari, Fausto Gironi

Dipartimento di Ingegneria Chimica Materiali Ambiente, “Sapienza” Università di Roma, Rome, Italy.

DOI: 10.4236/ajac.2013.412093                

Abstract

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.

 

Keywords

Supercritical; Extraction; Carbon Dioxide; Orange Essential Oil; Linalool; Phase Equilibrium

Conflicts of Interest

The authors declare no conflicts of interest.

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