Phase behavior of lemon and bergamot peel oils in supercritical CO₂

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• 作者：Franceschi ; Elton ; Grings ; Marcelo B. ; Frizzo ; Caren D. ; Oliveira ; J. Vladimir ; Dariva ; Clá ; udio
• 关键词：Multiphase equilibria ; Bergamot peel oil ; Lemon peel oil ; Supercritical carbon dioxide ; Peng&ndash ; Robinson EoS
• 刊名：Fluid Phase Equilibria
• 出版年：2004
• 期刊代码：32_03783812
• 类别：ce
• 出版时间：December 10, 2004
• 卷：226
• 期：Complete
• 页码：1-8
• 文件大小：158 K

摘要

The main objective of this work was to investigate the high-pressure phase behavior of the binary systems CO₂–lemon (Citrus latifolia Tanaka) and CO₂–bergamot (Citrus bergamia Risso et Poit.) peel oils. The static synthetic method using a variable-volume view cell was employed for obtaining the experimental data in the CO₂ overall composition range of 5–98wt.%, from 313 to 343K and pressures up to 19MPa. For both systems, the experimental data revealed the occurrence of vapor–liquid, liquid–liquid and vapor–liquid–liquid phase transitions. Additionally, vapor–liquid equilibrium data were measured for CO₂–linalyl acetate, one of the major compounds of the bergamot oil. The thermodynamic modeling was performed using the Peng–Robinson equation of state with the classical quadratic mixing rules, with a satisfactory agreement between experimental and calculated values.