A mutual-diffusion-coefficient model based on local-composition concept is
developed. An expression for the calculation of concentration-dependent int
ra-diffusion coefficients is also established by considering the formation
of clusters. With the import of diffusion coefficients at infinite dilution
, self-diffusion coefficients and viscosities of pure components and mixtur
es, mutual-diffusion-coefficients of binary fluid mixtures can be predicted
. The total average relative deviation of predicted values with respect to
experimental data is 6.0% for 45 binary systems including those containing
associative component. Results indicate that this model is superior to some
currently used methods. (C) 2001 Elsevier Science B.V. All rights reserved
.