Abstract
The van der Waals one-fluid theory was applied to mixtures of simple molecules and to systems containing carbon dioxide.
The excess properties of mixtures of simple molecules, GE, HE and VE, were well correlated by introducing correction factors, ζ12 and η12, for the Lorentz-Berthelot rules for the potential parameters between unlike molecules. Further, these parameters were useful in correlating the vapor-liquid equilibria for mixtures of simple molecules.
Among systems containing carbon dioxide, the vapor-liquid equilibria for carbon dioxide-light hydrocarbon systems and carbon dioxide-fluorocarbon systems were also well correlated by introducing the correction factor, ζ12. On the other hand, systems consisting of carbon dioxide and simple molecules could be successfully correlated by adjusting the critical temperature of the light component.
