Vapor Liquid Equilibrium for the Binary of 1-Methoxy-2-propanol + 1,2-Propanediol and 2-Methoxy-1-propanol + 1,2-Propanediol at 101.3 kPa and 50.0 kPa

Abstract

The isobaric vapor–liquid equilibrium (VLE) data of 1-methoxy-2-propanol (PM) + 1,2-propanediol (PG) and 2-methoxy-1-propanol (MP) + 1,2-propanediol (PG) was measured in this work by a modified Rose-Williams still under pressures of 101.3 kPa and 50.0 kPa. The Wisniak test and the Van Ness test were applied to confirm the thermodynamic consistency of the VLE data. The experimental isobaric VLE data were correlated by the nonrandom two-liquid and universal quasichemical models. The experiment results showed that these two models perfectly correlate the measured VLE data.

Isobaric Vapor–Liquid Equilibrium for the Binary Systems of 2-Phenylethanol + 2-Ethylphenol, 1-Phenyl-2-propanol + 2-Ethylphenol, 2-Phenylethanol + 1-Phenyl-2-propanol and 2-Phenyl-1-propanol + 2-Ethylphenol under 101.3 kPa

“…Furthermore, the root means square deviation (RMSD) and average absolute deviation (AAD) of the VLE data were calculated as well. RMSD reflects the extent of data scattering, while ADD describes the closeness of experimental data to model-calculated data, which are written as follows: where k denotes the number of experimental points; Z c , i and Z e , i denote the experimental and calculated values, respectively. RMSD and AAD of the vapor phase composition and the temperature were calculated and listed in Table .…”

“…Furthermore, the root means square deviation (RMSD) and average absolute deviation (AAD) of the VLE data were calculated as well. RMSD reflects the extent of data scattering, while ADD describes the closeness of experimental data to model-calculated data, 27 which are written as follows:…”

Isobaric Vapor–Liquid Equilibrium of Isoamyl Alcohol, Cyclohexane, n-Hexane, and the n-Heptane + Isoamyl Butyrate Binary System at 101.3 kPa

“…It is important to check the thermodynamic consistency of experimental data. The purpose of thermodynamic consistency tests is to test the reliability of data, and common methods are the Fredenslund test, Van Ness point test, and Wisniak method . Pequenín et al measured VLE isobaric data for the ternary system (water + cyclohexane + heptane) at 101.3 kPa and used the Wisniak method to test the thermodynamic consistency of data.…”