engleski

Connection of hydrodynamics and nucleation kinetics in dual impeller crystallizer

The influence of hydrodynamic conditions in dual- impeller crystallizers at different impeller spacings on nucleation kinetics was investigated. Dual-pitched-blade turbine (2 PBT) and dual- straight-blade turbine (2 SBT) impeller configurations were used. To analyze hydrodynamic conditions at different impeller spacings, a computational fluid dynamics model was developed and validated by experimentally determining mixing time and power input. Results show that nucleation kinetics in the 2 SBT impeller system is affected by the characteristic microscale parameters. The same was not observed in the 2 PBT impeller system. Also, as a consequence of higher shear stress values, smaller but less agglomerated crystals were obtained in 2 SBT impeller systems.

Computational fluid dynamics modeling ; Crystallization ; Dual-impeller crystallizer ; Mixing ; Mixing time

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