Experimental determination and modelling of high-pressure phase behavior for the binary system CO 2 + cyclooctane 2 Highlights High-pressure phase equilibria were measured for the system CO 2 + cyclooctane 80 bubble points and 16 dew points were acquired The experimental data were obtained using a variable volume high-pressure cell The studied binary system probably exhibits a type V phase behavior Data were correlated with the Peng-Robinson equation and advanced mixing rules