a considerably improvement in the representation of squalene solubility (Fig. 2) and equilibrium constants (Fig. 3) was obtained, in comparison to the results provided by using the original parameters.All pure group and binary interaction parameters used in this work to represent the vapor–liquid equilibria of the FAAE+CO2, TAG+CO2 and squalene +CO2 binary systems are summarized in Table 1. In addition, the required pure component parameters (critical temperature, critical pressure and critical hard sphere molecular diameter) are given in Table 2.