Measurement of VLE Data by Using an Experimental Installation with Automatic Control: Modeling of Binary Systems of Methyl Acetate or Ethyl Acetate with n‑Heptane or 2,2,4-Trimethylpentane at Both 0.1 and 1.5 MPa

The excess volume of binary mixtures and the isobaric vapor–liquid equilibrium (VLE) data at high pressure have been determined. The VLE values for methyl acetate + n-heptane or 2,2,4-trimethylpentane and ethyl acetate + n-heptane or 2,2,4-trimethylpentane at different pressures were obtained experimentally using a stainless steel ebulliometer. The experimental data at 0.1 MPa were verified by using the point-to-point test. The high pressure data were verified by employing the ϕ–ϕ approximation. The equations of state (EOSs) of Peng–Robinson–Stryjek–Vera, with both quadratic or Wong–Sandler mixing rules, and the PC-SAFT were applied for modeling purposes. It has been verified that the azeotropic point in the binary mixtures of this work was eliminated by increasing the pressure.