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Effect of Operating Conditions on Ice Characteristics in Continuous Eutectic Freeze Crystallization
Author(s) -
Chivavava Jemitias,
RodriguezPascual Marcos,
Lewis Alison E.
Publication year - 2014
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400094
Subject(s) - crystallization , supercooling , supersaturation , eutectic system , materials science , residence time (fluid dynamics) , ice crystals , chemical engineering , crystallography , chemistry , thermodynamics , microstructure , optics , geology , organic chemistry , physics , geotechnical engineering , engineering
The efficacy of eutectic freeze crystallization (EFC) in crystallizers and in subsequent downstream washing or filtration steps is a direct function of size and morphology of the crystalline products. These product characteristics are influenced by supersaturation and residence time. To investigate the effect of residence time and supercooling on ice product characteristics in a continuous EFC process, crystallization experiments were performed in an EFC crystallizer with Na 2 SO 4 aqueous solution. Crystal size distribution and morphology during the crystallization process were analyzed by digital image processing. Longer residence times enhanced the mean crystal size and disk‐shaped ice crystals were formed. Increasing supercooling resulted in a larger mean ice equivalent diameter.