The solubility of CO2 in PEGs was measured in the pressure range of 70 to 250 bar using a magnetic suspension balance. The phase behaviour was modelled by using the Sanchez-Lacombe equation of state and statistical associating fluid theory (SAFT). The experimental data are in good agreement with the solubility values previously described in the literature, obtained by employing different experimental techniques. By the described measurements the magnetic suspension balance and the solubility and diffusivity determination methods were tested.
Phase equilibrium data (P-T-x-y) for the binary mixtures of organic solvent (ethanol, tetrahydrofuran, xylene) with CO2 have been measured at temperatures 313.2, 333.2, 353.2 K and pressures from 10 to 140 bar using a static-analytic method. The experimental results have been correlated by the Peng-Robinson equation of state in combination with van der Waals mixing rule. Data are important for the design of high pressure micronization process of powder coatings, where the knowledge of mutual solubilities of CO2 and liquid solvent used for preparation of suspension is crucial.