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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 9, 2005
Accepted March 7, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Crystal shape monitoring and supersaturation measurement in cooling crystallization with quartz crystal oscillator

Byoung Chul Kim Hyun Woog Kang Young Han Kim^†

Dept. of Chemical Engineering, Dong-A University, Busan 604-714, Korea

Korean Journal of Chemical Engineering, September 2006, 23(5), 789-794(6), 10.1007/BF02705929

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Abstract

A crystallization monitoring system using a quartz crystal oscillator was utilized to predict different shapes of crystal formation by measuring crystal growth rate and to measure supersaturation. Applying different rates of cooling, crystal formation of different shapes was induced, and the frequency variation of the oscillator and the crystal shape observed with an SEM were compared to determine how the frequency variation can be interpreted for the prediction of produced crystal shape. The experimental results obtained from the crystallization of potassium nitrate and cupric sulfate solutions showed that the proposed frequency measurement technique could be applied in the prediction of crystal shape of cooling crystallization processes. In addition, supersaturation was determined from the measurements of solution and coolant temperatures.

Keywords

Crystallization Crystal Shape Quartz Crystal Oscillator Crystallization Monitoring

References

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