LAUSR

Abstract The hydrogen bonding term is added to the Patel-Teja viscosity equation of state for the first time to predict the viscosity of the liquid mixtures of hydrochlorofluorocarbons, hydrofluorocarbons and hydrofluoroolefins. Firstly, the parameters of the 17 pure substances are regressed for two ranges of pressure, including (1-500) bar and (1-1000) bar. The present model successfully reproduces the viscosity values (Overall AADs%=4.66% and 4.78% for these two ranges of pressure). Then the viscosity equation of state has been extended to binary and multicomponent liquid mixtures by using two different mixing rules and considering the cross association. The performance of this model is tested through the viscosities of 8 binary liquid mixtures and 3 multi-component liquid mixtures. Moreover, the binary interaction parameter is set equal to zero to make this model predictive. The results of the present model prove that the addition of hydrogen bonding term leads to the generally low deviations for all liquid mixtures (Overall AADs% are 4.27% for 4.37% for binary and multicomponent liquid mixtures, respectively).