Densities and viscosities of the mixtures (formamide+2-alkanol): Experimental and theoretical approaches

作者：Almasi Mohammad^*

来源：Journal of Chemical Thermodynamics, 2014, 69: 101-106.

DOI：10.1016/j.jct.2013.09.043

• Density
• Viscosity
• Binary mixtures
• Equations of state

Densities and viscosities of binary liquid mixtures of formamide (FA) with polar solvents namely, 2-PrOH, 2-BuOH, 2-PenOH, 2-HexOH, and 2-HepOH, have been measured as a function of composition range at temperatures (298.15, 303.15, 308.15,313.15) K and ambient pressure. From experimental data, excess molar volumes, V-m(E) m and viscosity deviations Delta eta, were calculated and correlated by Redlich-Kister type function. The effect of temperature and chain-length of the 2-alkanols on the excess molar volumes and viscosity deviations are discussed in terms of molecular interaction between unlike molecules. The statistical associating fluid theory (SAFT), and perturbed chain statistical associating fluid theory (PC-SAFT) were applied to correlate and predict the volumetric behavior of the mixtures. The best predictions were achieved with the PC-SAFT equation of state. Also the Peng-Robinson-Stryjek-Vera equation of state has been used to predict the viscosity of binary mixtures.

• 出版日期2014-2