Viscosity modeling of associating fluids based on the friction theory:: pure alcohols

In this work, the friction theory (f-theory) has been extended to the accurate viscosity modeling of the following alcohols: methanol, ethanol, n-propanol. 2-propanol, n-butanol, 2-butanol, 2-methyl-2-propanol, 1,2-ethanediol, and 1,2-propanediol up to high pressure and, in some cases. over wide temperature ranges. The modeling results are within the experimental uncertainty (+/-2%), satisfactorily and appropriate for most industrial applications. In spite of the fact that alcohols are associating fluids, this accurate viscosity modeling is achieved in conjunction with the simple Soave-Redlich-Kwong (SRK) and Peng and Robinson (PR) equations of state (EOS). Based on these EOS, the viscosity approach presented in this work preserves the accuracy that the f-theory models have previously shown for n-alkanes. (C) 2002 Elsevier Science B.V. All rights reserved.