Densities and Viscosities of 1-Butyl-3-methylimidazolium Tetrafluoroborate + H₂O Binary Mixtures from (303.15 to 353.15) K

Abstract

Densities and viscosities of water (1) + 1-butyl-3-methylimidazolium tetrafluoroborate (2) were measured over the entire mole fraction range from (303.15 to 353.15) K. From these data, excess molar volumes (V E ), and viscosity deviations (∆η) were calculated. The V E and ∆η were fitted to the Redlich-Kister equation using a multiparametric nonlinear regression method. Estimated coefficients of the Redlich-Kister equation and standard deviation calculated from the Redlich-Kister equation to the experimental data are also presented. The results show that the densities and viscosities are dependent strongly on water content. Comparatively, the viscosity deviation ∆η is more sensitive to temperature than the excess molar volume V E .

Physical Properties of Binary Mixtures of ILs with Water and Ethanol. A Review.

“…Thus, in Figure 1 we plot density vs. IL molar fraction for aqueous mixtures of five imidazolium Malhan et al, 2007;Ge et al, 2009) and the only two pyridinium based ILs (Ortega et al, 2008;Mokhatarani et al, 2009b), all of them with BF 4 as common anion. Other authors also measured some of those systems, but results are very similar (Zhou et al, 2006;Zhang et al, 2006;Wu et al, 2009). The behaviour is very similar for all of the systems with BF 4 anion, and the absolute value decreases with the cation size.…”

Thermophysical properties of ionic liquids and their mixtures from a new equation of state

“…In this respect, we compare the outcomes of our calculations with those obtained from Fadaei-Nobandegani et al [40]. Table 3 contains the AAD of the calculated densities of binary mixtures using the present model and other equations of state [40] from the literature data [32][33][34][35][36]. Close inspection of the results shows the ability of the present model to describe liquid density data for IL mixtures.…”

“…Table 2 tabulates the AAD of the predicted densities of several binary of IL + IL and IL + solvent mixtures at various temperatures and mole fractions from literature values [32][33][34][35][36][37][38][39]. Besides, the maximum deviations (MD) of the calculations have also been included in Table 2.…”

“…The coefficients c 1 -c 3 were fixed for each IL by correlating the viscosity data at 0.1 MPa and their numerical values were reported in Table 4. Table 5 contains the AAD of the calculated viscosity coefficients of studied pure ILs from the experimental ones [33,34,37,39,[41][42][43][44][45][46][47][48] in temperature interval 278-363 K and atmospheric pressure. For 150 data point examined, the overall AADs for MET and RHS models were found to be 5.78 and 6.06, respectively.…”

“…We have calculated the viscosities of binary mixtures of ILs over the whole range of concentration. Further, Table 6 shows the AAD of the calculated viscosities of mixtures of several ionic liquids from the experimental ones [33,34,37,39]. From 661 data points examined for the aforementioned mixtures, the mean AAD of the predicted viscosities from measurement was found to be 22.48% and 9.79 without and with binary interaction parameter.…”