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Pinki Kashyap,Manju Rani,Dinesh Pratap Tiwari,박소진 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.11
Dynamic viscosities (η) of the binary liquid mixtures of 2-propanol (1)+n-alkanes (C6, C7, C9) (2) at T=288.15 K to 303.15 K and ethanol (1)+n-alkanes (C6, C7 , C8) (2) at T=308.15 K to 318.15 K were experimentally measured over the whole composition range. Experimental values of η were used to compute the deviation in dynamic viscosity (Δη) and these Δη values were correlated with the Redlich-Kister equation. The η values of binary mixtures were also calculated using several empirical correlations and mixing rules like Grunberg-Nissan, Tamura-Kurata, Kati- Chaudhari and McLaughlin-Ubbelohde and found that the Grunberg-Nissan correlation gave the best estimation. The Δη values were also predicted by an approach given by Singh et al. [Indian J Chem 29, 263 (1990)].
Kashyap, Pinki,Rani, Manju,Tiwari, Dinesh Pratap,Park, So-Jin The Korean Institute of Chemical Engineers 2020 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.58 No.2
Densities (ρ) for binary mixtures of ethanol (1) + diisopropyl ether (DIPE) or cyclohexane or alkane (C<sub>6</sub>-C<sub>9</sub>) (2) were measured at 298.15 K, 308.15 K and 318.15 K. The excess molar volume (V<sup>E</sup><sub>m</sub>) of binary mixtures was calculated using ρ data and correlated with Redlich-Kister polynomial equation. The V<sup>E</sup><sub>m</sub> values for binary mixtures of ethanol (1) + cyclohexane or n-alkane (C<sub>6</sub>-C<sub>9</sub>) (2) were positive, whereas for ethanol (1) + DIPE (2) these were negative. The magnitude of V<sup>E</sup><sub>m</sub> values follows the order: cyclohexane > n-nonane > n-octane > n-heptane > n-hexane > DIPE. The V<sup>E</sup><sub>m</sub> values have been interpreted qualitatively and also quantitatively in terms of Flory-Treszczanowicz-Benson (FTB) model and Prigogine-Flory-Patterson (PFP) theory. The values V<sup>E</sup><sub>m</sub> predicted using FTB model agree well with experimental V<sup>E</sup><sub>m</sub> values at all mole fractions. But the PFP theory describes well V<sup>E</sup><sub>m</sub> data in ethanol-rich region (x<sub>1</sub> > 0.5) for all binary mixtures and is able to predict the sign of V<sup>E</sup><sub>m</sub> vs x<sub>1</sub> curve for ethanol-lean region (x<sub>1</sub> < 0.5) except for ethanol (1) + nonane (2) mixtures.