Eutectic freeze crystallization using CO2 clathrates

R. J.C. Vaessen*, F. Van Der Ham, G. J. Witkamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Highly soluble salts can be separated from aqueous solutions by eutectic freeze crystallization (EFC). This technique delivers significant energy savings in comparison with evaporative crystallization. The eutectic temperature can be raised by crystallizing CO2 clathrates instead of normal ice. Application of this process is especially efficient for salt solutions with eutectic points at low temperatures, such as CaCl2 (-55°C). In this work the shift of the eutectic point is predicted by use of a model for NaCl and CaCl2 solutions. Experiments are executed under eutectic conditions, with these substances proving the feasibility of the eutectic clathrate freezing process. Energy calculations show that by using eutectic clathrate crystallization instead of regular EFC the electric energy consumption ran be reduced by 32%.

Original languageEnglish (US)
Pages (from-to)483-495
Number of pages13
JournalAnnals of the New York Academy of Sciences
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry, Genetics and Molecular Biology
  • History and Philosophy of Science


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