High Pressure Vapor–Liquid Equilibria of n-Heptane with Ethanol, 1-Propanol, 2-Propanol, and 1-Butanol at 1.5 MPa: Experimental Data of Binary Systems and Perturbed Chain–Statistical Associating Fluid Theory Model Predictions

Abstract

The isobaric vapor–liquid equilibrium for the binary mixtures of n-heptane + ethanol, n-heptane + 1-propanol, n-heptane + 2-propanol, and n-heptane + 1-butanol at 1.5 MPa was obtained experimentally using a stainless steel ebulliometer. The experimental data have been verified thermodynamically by employing the ϕ–ϕ approximation. The azeotropic points in both mixtures have been verified by considering the trend of the azeotropic data and using the bibliographic data for each mixture. The Peng–Robinson–Stryjek–Vera equation of state using both quadratic and Wong–Sandler mixing rules as well as the Perturbed Chain–Statistical Associating Fluid Theory was applied to evaluate the reproducibility of the data by these models.