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Friction Theory and Free-Volume Theory Coupled with Statistical Associating Fluid Theory for Estimating the Viscosity of Pure n-Alkanes

by: Sugata P. Tan, Hertanto Adidharma, Brian F. Towler, Maciej Radosz

(Industrial and Engineering Chemistry Research 2005, vol. 44, pp. 8409-8418)

Abstract

Two viscosity models, Friction Theory and Free-Volume Theory, are coupled with Statistical Associating Fluid Theory equations of state, such as SAFT1 and PC-SAFT, to model the viscosity of pure n-alkanes. The parameters of both viscosity models are found to scale linearly with molecular weight so that the models can predict the viscosity of long n-alkanes.