(382aa) Viscometric Properties of Binary Liquid Mixtures Containing (Acetonitrile + C4-C5 Alcohols) at Different Temperatures and Atmospheric Pressure

Experimental data of viscosity and its derivate properties are very important in the calculation of the power requirements for the unit operations such as mixing, pipeline design, pump characteristics, atomization, storage, injection, and transportation [1]. Recently, many authors have reported viscosity data for binary mixtures with alkanols: Kumar et. al. [2], Almasi [3], Dubey and Kumar [4], Kumar et al. [5], Sreekanth et al. [6], Hoga and Torres [7]. In this study, viscosities for the binary liquid mixtures of (acetonitrile + 1-butanol, or + 1-pentanol) have been measured as a function of composition at temperature range between (288.15 and 308.15) K and atmospheric pressure. From these results, deviations in viscosity and excess Gibbs energy of activation for viscous flow were calculated and correlated to Redlich-Kister polynomial equation. For both systems studied, the values of these functions were negative over the entire composition range. Furthermore, the viscosity data were correlated with equations of Grunberg and Nissan, Hind et al., Katti and Chaudhari, Heric and Brewer and Van der Wyk. The viscosities of pure components and their solutions were measured using a viscometer manufactured by Anton Paar (Model SVM 3000 / G2), which was calibrated with special oils. The reproducibility in the viscosity measurements was ± 0.35% and in the temperature measurements was ± 0.02 K. The temperature was automatically kept constant with ±0.01 K using the Peltier device built in the equipment. The results obtained were discussed in terms of structural effects and intermolecular interactions between like and unlike molecules.

References

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[7] Hoga, H.E.; Torres, R.B. J. Chem. Thermodyn., v. 43, p. 1104-1134, 2011.