Estimation of Multicomponent Fick Diffusion Coefficients for Liquid Mixtures

2 Estimation of Multicomponent Fick Diffusion Coefficients for Liquid Mixtures 

Ideally one would like to be able to predict the elements of [D] from a knowledge of the infinite dilution diffusion coefficients f)°y. A comparison of the generalized Fick s law (Eq. 3.2.5), with the Maxwell-Stefan equations (Eq. 2.2.10) shows that, for a nonideal system, the 

or some other similar relation, is the starting point for developing methods of predicting [D]. 

For ternary systems the inverse of [B] is given by the right-hand sides of Eq. 4.2.7. This matrix must be postmultiplied by [F] to obtain the elements of [ ] as 

In order to use the procedure of Section 4.2.2 to predict [D] we need the Maxwell-Stefan diffusivities of each binary pair in the multicomponent mixture. 

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