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.