Modeling vapor-liquid phase equilibria of methane-water and methane-carbon dioxide-water systems at 274K to 573K and 0.1 to 150 MPa using PRSV equation of state and Wong-Sandler mixing rule

摘要

Attempts were made in this study to accurately correlate mutual solubilities of the CH4-H2O and the CO2-CH4-H2O systems with a conventional two-phase flash method using cubic equation of state. A new set of model parameters for the CH4-H2O binary pair were presented for our previous published PRSV + WS (NRTL) model to enable flash calculation and stability analysis for the CH4-H2O and the CO2-CH4-H2O systems over the temperature and pressure ranges of 274-573 K and 0.1-150 MPa.