Abstract
The effects of growth rate dispersion (GRD) on the mean crystals sizes, the coefficients of variation of the crystals, and the production of the crystals are examined for a batch crystallizer based on the constant crystal growth (CCG) model. In the proposed method, the population balance and the mass balance are simultaneously solved with the growth rate kinetics, the nucleation rate kinetics, and the solubility data of aqueous sucrose solutions. To keep the supersaturation at a constant level during the whole batch operation, the operating temperature of the crystallizer can be determined base on the proposed model. Thus, the cooling rate needs to be programmed to achieve the required operating temperature. The results show that GRD has little effect on mean crystal sizes, but it has great effect on coefficients of variation of the crystals and crystal production. Neglecting the incorporation of GRD in the design of a batch cooling crystallizer will cause some deviations in the prediction of crystal distribution and crystal production.
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