Article ID Journal Published Year Pages File Type
154922 Chemical Engineering Science 2014 20 Pages PDF
Abstract

•The extended corresponding states principle is used to predict self-diffusivities.•Corrections by the modified Enskog theory are examined.•Correlation with a new parameter reduces the errors of the model.•Hydrogen-bonding substances present some peculiarities.

The ability of the extended corresponding states principle (ECSP) to predict the self-diffusion coefficients of several types of fluids has been studied. Two versions of the model were compared with the traditional two-parameter corresponding states principle (where the equilibrium shape factors are set to unity): one using the equilibrium shape factors and another one that additionally introduces a correction based on the modified Enskog theory (MET). Ethane was chosen as a reference fluid and the experimental database comprises 3163 points from 37 substances (polar, non-polar and hydrogen-bonding ones). Results show that a third complementary parameter, generated from diffusion data, is necessary to accurately correlate this transport property.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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