Abstract
Secondary nucleation in suspension is most frequently modelled by an empirical “power-law” relating the nucleation rate to supersaturation and to the slurry density of the crystals already present in the solution. In this paper kinetic rate equations are developed based on a general modelling of secondary nucleation employing two mechanisms, surface breeding and mechanical breeding , each consisting of sequential steps. The specific equations gained in this way are used to determine the breeding mechanisms prevailing in suspension crystallization. Ammonium sulfate was used as a test case. For this system it is concluded that surface breeding is the predominant mechanism in both evaporation and cooling experiments.
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