GENERAL KINETIC INVARIANT MODEL OF DISSOLUTION OF LARGE POLYDISPERSE PARTICLES

The kinetic invariant model proposed earlier for dissolution followed by chemical reaction of large, monodisperse particles (A.N. Bhaskarwar , AIChE J., 37 (1991) 340-346) has been extended for large, polydisper se particles by means of a population balance. Approximate analytical expressions for the particle size distribution as a function of time h ave been presented for several standard initial distributions. These s olutions are valid for the general transition regime. Solutions for th e rate-limiting regimes, i.e. diffusion and kinetic control, are deduc ed as special cases of the general solution. The model is compared wit h experimental results reported in literature.