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Isothermal Vapor–Liquid Equilibrium for Binary Mixtures of Polyoxyethylene Dodecanoate with Methanol, Ethanol, or Propan-2-ol

Ianatul Khoiroh, Ming‐Jer Lee

Open publisher page 6 citations

Abstract

Isothermal vapor–liquid equilibrium (VLE) data have been measured for oligomeric polyoxyethylene dodecanoate (POEDDA) with methanol, ethanol, or propan-2-ol. A synthetic method was used to determine experimentally p – T – x data in the temperature range of (343.2 to 423.2) K. For each binary system, four feed compositions were studied over the concentration range from 0.100 to 0.400 of POEDDA in mole fractions. These new VLE data were fitted to the Antoine equation and also correlated with the nonrandom two-liquid (NRTL) and the universal quasichemical activity coefficient (UNIQUAC) models. The results reveal that the performance of the UNIQUAC and the NRTL models are almost the same. The solvent activities were directly calculated from VLE data and compared to those calculated from the NRTL and the UNIQUAC models.

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What this paper is about

Isothermal vapor–liquid equilibrium (VLE) data have been measured for oligomeric polyoxyethylene dodecanoate (POEDDA) with methanol, ethanol, or propan-2-ol. A synthetic method was used to determine experimentally p – T – x data in the temperature range of (343.2 to 423.2) K. For each binary system, four feed compositions were studied over the concentration range from 0.100 to 0.400 of POEDDA in mole fractions. These new VLE data were fitted to the Antoine equation and also correlated with the nonrandom two-liquid (NRTL) and the universal quasichemical activity coefficient (UNIQUAC) models. The results reveal that the performance of the UNIQUAC and the NRTL models are almost the same. The solvent activities were directly calculated from VLE data and compared to those calculated from the NRTL and the UNIQUAC models.

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Available abstract

Isothermal vapor–liquid equilibrium (VLE) data have been measured for oligomeric polyoxyethylene dodecanoate (POEDDA) with methanol, ethanol, or propan-2-ol. A synthetic method was used to determine experimentally p – T – x data in the temperature range of (343.2 to 423.2) K. For each binary system, four feed compositions were studied over the concentration range from 0.100 to 0.400 of POEDDA in mole fractions. These new VLE data were fitted to the Antoine equation and also correlated with the nonrandom two-liquid (NRTL) and the universal quasichemical activity coefficient (UNIQUAC) models. The results reveal that the performance of the UNIQUAC and the NRTL models are almost the same. The solvent activities were directly calculated from VLE data and compared to those calculated from the NRTL and the UNIQUAC models.

Key concepts: UNIQUAC, Non-random two-liquid model, Isothermal process, Thermodynamics, Chemistry, Activity coefficient, Methanol, Vapor–liquid equilibrium

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Isothermal Vapor–Liquid Equilibrium for Binary Mixtures of Polyoxyethylene Dodecanoate with Methanol, Ethanol, or Propan-2-ol — Research Paper | ScholarLens