A Viscosity Model of Liquid Mixtures under High Pressure Based on an Equation of State

Combined with the state equation of chain-like fluids,a model for correlating and predicting viscosities of liquid mixtures under high pressures was established based on Eyring's absolute rate theory.Present model can be used to correlate satisfactorily the viscosity of liquid mixtures with only one(adjustable) and temperature independent parameter,and good agreements between the predicted values and experimental data for the selected systems are attained.For the 20 binary systems and one ternary system,3 075 data points from 0.1 MPa to 73 MPa,and from 273 K to 373 K,the overall average absolute correlated and predicted deviation is 1.47% and 2.62% respectively.Results calculated by this model are accurate than by the friction theory(f-theory) for hydrocarbon mixtures.