Journal of Chemical and Engineering Data, Vol.59, No.11, 3691-3704, 2014
Estimation of the Viscosity of Ionic Liquids Containing Binary Mixtures Based on the Eyring's Theory and a Modified Gibbs Energy Model
Eyrings absolute rate theory was applied for evaluation of the viscosity of ionic liquids (ILs) containing binary mixtures. Considering the mathematical simplicity of the two-suffix-margules model, the Gibbs energy model was further modified. Furthermore, for viscosity evaluation, the proposed Gibbs energy model was coupled with Eyrings theory. To validate the accuracy of the proposed model, a large set of data containing the binary mixtures of 122 ILs with a total number of 5512 experimental data points was collected from the literature. Moreover, the average absolute relative deviation (AARD %) was obtained as 2.07 %. Also, the capability of the EyringMTSM model was tested for the prediction of viscosity for binary and ternary systems. Additionally, comparison of the proposed model with the EyringNRTL model indicated a higher accuracy for our model. Finally, the EyringUNIFAC model was also checked, and it was found that this model is not accurate enough in its present form.