Growth kinetics of potassium alum crystal in a well-agitated vessel

Abstract

Growth rates of potassium alum crystal in a well-agitated vessel were determined from the de-supersaturation curve of the solution. The mass transfer and surface integration coefficients were then estimated using the two-step model. Both coefficients were found to increase with increasing crystal size. Judging from the Damköhler number for crystal growth and the over-all order of the growth rate equation, it is concluded that both mass transfer resistance and surface integration resistance are significant in the growth process.