Phase Equilibria, PVT Behavior, and Critical Phenomena in Carbon Dioxide + n-Alkane Mixtures Using the Perturbed-Chain Statistical Associating Fluid Theory Approach

摘要: The perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state was shown to be suitable for pure components and mixtures solvents gases as well liquid−liquid vapor−liquid equilibria polymer systems. In this work, the ability PC-SAFT predict complex phase behavior that can found in carbon dioxide + n-alkane systems analyzed. pure-component parameters were taken from literature, kij binary interaction parameter calculated by using experimental vapor−liquid−liquid CO2 n-tridecane at several temperatures. From different but close values, = 0.12 selected. This value allowed one obtain a mixture exhibits type IV behavior, which is agreement with results. transferred other calculation properties such equilibria, densities, critical lines, critica...