Metastable limit dynamics and optimal cooling curve of batch seeded crystallization

Seunghee Won, Kwang S. Lee, Chung S. Choi, Ju Seok Lee, Daeryook Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


For seeded cooling crystallization, itn is required that the solution is maintained at a supersaturation state within the metastable limit for suppression of homogeneous nucleation. However, the metastable limit is not fixed but time-varying depending upon the solution history. in this study, dynamics of the metastable limit has been exploited. Using the experimental results obtained under various cooling rates, the metastable limit was expressed to have a nonlinear first-order dynamics to a change in the cooling rate. By incorporating this model, an optimal cooling curve was determined for (NH 4)2SO4 crystallization from the (NH 4)2SO4-NH4NO3-H 2O ternary system and experimental verification has been performed.

Original languageEnglish
Title of host publicationProceedings of the 16th IFAC World Congress, IFAC 2005
PublisherIFAC Secretariat
Number of pages6
ISBN (Print)008045108X, 9780080451084
Publication statusPublished - 2005

Publication series

NameIFAC Proceedings Volumes (IFAC-PapersOnline)
ISSN (Print)1474-6670


  • Batch crystallization
  • Batch model predictive control
  • Cooling crystallization
  • Metastable limit

ASJC Scopus subject areas

  • Control and Systems Engineering


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