Predicting diffusivities in liquids by the group contribution method

The group contribution method to predict diffusivities in binary liquid systems is compared with other well-known semi-empirical correlations, such as Wilke–Chang, Hayduk–Minhas and Tyn–Calus, by means of literature data including also systems of commercial interest, e.g. sulfolane–aromatics systems. This comparison indicates that the group contribution method is superior to the other correlations investigated. Furthermore, the prediction of diffusivities with the group contribution method is explained step-by-step by means of several examples