Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Application of Flory-Treszczanowicz-Benson model and Prigogine-Flory-Patterson theory to Excess Molar Volume of Binary Mixtures of Ethanol with Diisopropyl Ether, Cyclohexane and Alkanes (C6-C9)

  • Kashyap, Pinki (Department of Chemical Engineering, Deenbandhu Chhotu Ram University of Science and Technology) ;
  • Rani, Manju (Department of Chemical Engineering, Deenbandhu Chhotu Ram University of Science and Technology) ;
  • Tiwari, Dinesh Pratap (Department of Chemical Engineering, Deenbandhu Chhotu Ram University of Science and Technology) ;
  • Park, So-Jin (Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University)
  • Received : 2019.07.26
  • Accepted : 2020.01.06
  • Published : 2020.05.01
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Abstract

Densities (ρ) for binary mixtures of ethanol (1) + diisopropyl ether (DIPE) or cyclohexane or alkane (C6-C9) (2) were measured at 298.15 K, 308.15 K and 318.15 K. The excess molar volume (VEm) of binary mixtures was calculated using ρ data and correlated with Redlich-Kister polynomial equation. The VEm values for binary mixtures of ethanol (1) + cyclohexane or n-alkane (C6-C9) (2) were positive, whereas for ethanol (1) + DIPE (2) these were negative. The magnitude of VEm values follows the order: cyclohexane > n-nonane > n-octane > n-heptane > n-hexane > DIPE. The VEm values have been interpreted qualitatively and also quantitatively in terms of Flory-Treszczanowicz-Benson (FTB) model and Prigogine-Flory-Patterson (PFP) theory. The values VEm predicted using FTB model agree well with experimental VEm values at all mole fractions. But the PFP theory describes well VEm data in ethanol-rich region (x1 > 0.5) for all binary mixtures and is able to predict the sign of VEm vs x1 curve for ethanol-lean region (x1 < 0.5) except for ethanol (1) + nonane (2) mixtures.

Keywords

References

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