Abstract
One of the most important design considerations that should not be ignored during industrial purpose equipment designing is vapour-liquid equilibrium (VLE). Thus, in chemical engineering, the first step is the computation of VLE properties of materials by employing equations of state (EOS). In this study, we have used a thermodynamic model established for a binary system of carbon dioxide (1)-aqueous ethanol (2), which was employed to estimate the gas-liquid equilibrium at moderate pressures (up to 6 bar) and varying temperatures (288-323 K). The Peng-Robinson EOS was employed to determine the VLE properties. Mixing rules such as van der Weals and quadratic mixing rules were also used for the determination of ethanol-water mixture critical parameters, which entails the pseudo-critical method as one component, and the results obtained from this study were similar to the ones repotted in recent literature for empirical phase equilibrium studies.