Collect. Czech. Chem. Commun. 1979, 44, 1885-1899

Unsteady internal diffusion in dispersions

Ondřej Wein

Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol


The two parameter functional model of mass transfer is formulated between the dispersed and continuous phases without chemical reaction taking place in the dispersion and with negligible diffusion resistances in the continuous phase. The model takes into consideration polydispersity of the system and non-linearity of the equilibrium relation. The parameters of the model can be either estimated on basis of the theory of unsteady diffusion in solid particles or determined experimentally.