Abstract:

In order to recover the solvent that used for extraction of bitumen from oil sands by SC-CO₂, the vapor-liquid equilibrium data of supercritical carbon dioxide and reformed naphtha system were measured at 30.3—70.2℃ in the pressure range of 4.02—14.01 MPa.The measurements were carried out in a high pressure PVT apparatus with a movable piston.The range of recovery temperature and pressure was obtained.The average characteristic parameters of the reformed naphtha were calculated with group contribution method.The regression analysis of binary interactive parameters of supercritical carbon dioxide and reformed naphtha system with the state equation of Peng-Robinson was used to estimate the vapor-liquid equilibrium data under the same condition, which agreed well with the experimental data.