PREDICTION OF THE TEMPERATURE DEPENDENCE OF LIQUID DIFFUSION COEFFICIENTS AT INFINITE DILUTION BY A GROUP CONTRIBUTION METHOD

摘要

1 INTRODUCTIONSince experimental determination of the mutual liquid diffusion coefficients atinfinite dilution is rather complicated,it is important,therefore,to be able to esti-mate the coefficients under various temperatures from one available coefficient ata certain temperature such as 298K.Empirical equations for this purpose are avail-able in many forms.Typical examples are the Wilke-Chang equation and the Tynequation,given below