Interrelationships between P-V-T and flow behavior of linear and nonlinear hydrocarbons

Abstract

The aim of this work is to determine the branching effect on the flow behavior of alkanes. For this purpose, the zero-shear viscosity, eta(0), was analyzed in terms of the Simha-Somcynsky equation of state, SS-EOS, using the hole fraction, h = h(P, T) computed from it. For the analysis, eta(0)-data of the linear and three-branch alkanes measured in a wide range of temperature and pressure, were used. For the linear species, Utracki proposed a relation, viz. ln eta(0) = a(0)+a(1)/(h + a(2)), where a(1)= 0.79 and a(2) = 0.07 are the universal parameters for linear hydrocarbons and their mixtures. In this work, this relation was found to be valid for the linear but not for the branched alkanes.