The main objective of this work was to investigate the high-pressure phase behavior of the binary systems CO-lemon (Cirrus larifolia 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 5-98 wt.%, from 313 to 343 K and press up to 19 MPa. 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. (C) 2004 Elsevier B.V. All rights reserved.