Crystallization and precipitation engineering—III. A discrete formulation of the agglomeration rate of crystals in a crystallization process
Identifieur interne : 003488 ( Main/Merge ); précédent : 003487; suivant : 003489Crystallization and precipitation engineering—III. A discrete formulation of the agglomeration rate of crystals in a crystallization process
Auteurs : René David [France] ; Philippe Marchal [France] ; Jean-Paul Klein [France] ; Jacques Villermaux [France]Source :
- Chemical Engineering Science [ 0009-2509 ] ; 1990.
English descriptors
- KwdEn :
- Adipic acid, Adipic acid crystals, Agglomerate, Agglomerating crystals, Agglomeration, Agglomeration kernel, Agglomeration rate, Binary agglomeration, Boundary layer, Chem, Chemical growth regime, Crystal, Crystal size, Crystal size ratio, Crystalline bridge, Crystallization, Diffusional growth, Diffusional growth regime, Discrete formulation, Engng, Glastonbury, Growth rate, Initial concentration, Intrinsic rate, Lagrangian microscale, Large crystal, Larger crystal, Levins, Local velocity gradients, Major role, Marchal, Mass transfer, Mersmann, Microscale, Mother crystals, Particle concentrations, Power dissipation, Precipitation, Previous paper, Small crystal, Small crystals, Smaller crystals, Tank size, Taylor microscale, Turbulent flow, Unit mass, Unit volume.
- Teeft :
- Adipic acid, Adipic acid crystals, Agglomerate, Agglomerating crystals, Agglomeration, Agglomeration kernel, Agglomeration rate, Binary agglomeration, Boundary layer, Chem, Chemical growth regime, Crystal, Crystal size, Crystal size ratio, Crystalline bridge, Crystallization, Diffusional growth, Diffusional growth regime, Discrete formulation, Engng, Glastonbury, Growth rate, Initial concentration, Intrinsic rate, Lagrangian microscale, Large crystal, Larger crystal, Levins, Local velocity gradients, Major role, Marchal, Mass transfer, Mersmann, Microscale, Mother crystals, Particle concentrations, Power dissipation, Precipitation, Previous paper, Small crystal, Small crystals, Smaller crystals, Tank size, Taylor microscale, Turbulent flow, Unit mass, Unit volume.
Abstract
Abstract: An expression relying on fluid mechanical and phenomenological considerations is proposed for the agglomeration rate of adipic acid crystals during their crystallization in a mechanically stirred crystallizer. This expression accounts for the influence of particle concentration, supersaturation, power dissipation per unit mass, size of crystallizer and size of agglomerating crystals. The formation is adapted to the discretization method of the CSD into granulometric classes which was presented in a previous paper of this series. It is shown that crystal size strongly influences the agglomeration rate. The model involves one single free parameter for the agglomeration rate and can easily be applied to other agglomeration processes occurring in the supermicronic range during crystallization.
Url:
DOI: 10.1016/0009-2509(91)80130-Q
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<term>Agglomerating crystals</term>
<term>Agglomeration</term>
<term>Agglomeration kernel</term>
<term>Agglomeration rate</term>
<term>Binary agglomeration</term>
<term>Boundary layer</term>
<term>Chem</term>
<term>Chemical growth regime</term>
<term>Crystal</term>
<term>Crystal size</term>
<term>Crystal size ratio</term>
<term>Crystalline bridge</term>
<term>Crystallization</term>
<term>Diffusional growth</term>
<term>Diffusional growth regime</term>
<term>Discrete formulation</term>
<term>Engng</term>
<term>Glastonbury</term>
<term>Growth rate</term>
<term>Initial concentration</term>
<term>Intrinsic rate</term>
<term>Lagrangian microscale</term>
<term>Large crystal</term>
<term>Larger crystal</term>
<term>Levins</term>
<term>Local velocity gradients</term>
<term>Major role</term>
<term>Marchal</term>
<term>Mass transfer</term>
<term>Mersmann</term>
<term>Microscale</term>
<term>Mother crystals</term>
<term>Particle concentrations</term>
<term>Power dissipation</term>
<term>Precipitation</term>
<term>Previous paper</term>
<term>Small crystal</term>
<term>Small crystals</term>
<term>Smaller crystals</term>
<term>Tank size</term>
<term>Taylor microscale</term>
<term>Turbulent flow</term>
<term>Unit mass</term>
<term>Unit volume</term>
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<term>Agglomeration rate</term>
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<term>Boundary layer</term>
<term>Chem</term>
<term>Chemical growth regime</term>
<term>Crystal</term>
<term>Crystal size</term>
<term>Crystal size ratio</term>
<term>Crystalline bridge</term>
<term>Crystallization</term>
<term>Diffusional growth</term>
<term>Diffusional growth regime</term>
<term>Discrete formulation</term>
<term>Engng</term>
<term>Glastonbury</term>
<term>Growth rate</term>
<term>Initial concentration</term>
<term>Intrinsic rate</term>
<term>Lagrangian microscale</term>
<term>Large crystal</term>
<term>Larger crystal</term>
<term>Levins</term>
<term>Local velocity gradients</term>
<term>Major role</term>
<term>Marchal</term>
<term>Mass transfer</term>
<term>Mersmann</term>
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<term>Power dissipation</term>
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<front><div type="abstract" xml:lang="en">Abstract: An expression relying on fluid mechanical and phenomenological considerations is proposed for the agglomeration rate of adipic acid crystals during their crystallization in a mechanically stirred crystallizer. This expression accounts for the influence of particle concentration, supersaturation, power dissipation per unit mass, size of crystallizer and size of agglomerating crystals. The formation is adapted to the discretization method of the CSD into granulometric classes which was presented in a previous paper of this series. It is shown that crystal size strongly influences the agglomeration rate. The model involves one single free parameter for the agglomeration rate and can easily be applied to other agglomeration processes occurring in the supermicronic range during crystallization.</div>
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