Crystallization kinetics of MgSO4.12H2O from different scales of batch cooling scraped crystallizers by C. Himawan and G. J. Witkamp

Crystal Research and Technology

Cryst. Res. Technol. 41, 865 (2006) - Abstract -

Crystallization kinetics of MgSO₄.12H₂O from different scales of batch cooling scraped crystallizers

C. Himawan and G. J. Witkamp

Laboratory for Process Equipment, Delft University of Technology, Leeghwaterstraat 44, 2628 CA Delft, The Netherlands

Keywords	magnesium sulphate, crystallization, kinetics, parameter estimation, scale-up
PACS	81.10.Dn
DOI	10.1002/crat.200510685

For reliably scaling up of crystallizers, a full kinetic model is required in addition to heat, mass and population balances. A method for extracting nucleation and growth kinetic parameters for scaling-up seeded batch cooling crystallization was developed and demonstrated with a 15 L and in a 115 L scraped crystallizer using MgSO₄.12H₂O as the model system. The method includes fitting the time resolved measured solute concentration and the crystal size distributions with a dynamic population-based model. The kinetic parameters extracted from the bench-scale crystallizer agree with those obtained from the pilot scale, confirming that they can be employed for design purposes.

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