Korean Journal of Chemical Engineering

, Volume 13, Issue 4, pp 343–350 | Cite as

A comparison of crystal growth kinetics by use of chemical potential difference and concentration difference

  • Han Soo Na
  • Sae Joong Oh


A Spherical Void Electrodynanic Levitator Trap (SVELT) was used to measure the water activity in the supersaturated aqueous solutions of six materials, NaCl, (NH4)2SO4, KH2PO4, NH4H2PO4, KA1(SO4)2 · 12H2O and glycine. The relationship between chemical potential and concentration was obtained using a fifth order polynomial fit. A comparison of the order of the crystal growth rate obtained from the use of chemical potential difference and concentration difference was made. The order of crystal growth rate calculated from concentration difference was found to be close to that obtained from chemical potential difference at low supersaturation, while at higher supersaturation a deviation was noted.

Key words

Crystal Growth Water Activity Chemical Potential Supersaturation 


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Copyright information

© Korean Institute of Chemical Engineering 1996

Authors and Affiliations

  • Han Soo Na
    • 1
  • Sae Joong Oh
    • 1
    • 2
  1. 1.Honam Oil Refinery CO., LTD., Yocheon RefineryKorea
  2. 2.Dept. of Chemical EngineeringSun-Moon University, Asan-KunChung NamKorea

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