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

Publication history: Received May 21, 2004
Accepted November 15, 2004

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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Measurement of Hysteresis in Crystallization with a Quartz Crystal Sensor

Ok Jin Joung Young Han Kim^† Kouji Maeda¹ Keisuke Fukui¹

Dept. of Chemical Engineering, Dong-A University, Busan 604-714, Korea ¹Department of Chemical Engineering, University of Hyogo, Himeji 671-2201, Japan

Korean Journal of Chemical Engineering, January 2005, 22(1), 99-102(4), 10.1007/BF02701469

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Abstract

Monitoring of the cycle of crystal formation and dissolution gives important information for manipulating solute concentration and solution temperature for the preparation of mother solution in crystallization processes. In this study a direct monitoring technique using a quartz crystal sensor is applied to the crystallization of potassium bromide solution, and the monitoring performance is investigated. The experimental results indicate that the monitoring shows the detailed process of crystal formation and dissolution, and there is a hysteresis of 0.98 ℃ between the initiation temperature of crystal formation and the completion temperature of dissolution in the first measurement. In addition, it is demonstrated that the application of the technique is simple and efficient for the control of crystallization processes.

Keywords

Crystallization Quartz Crystal Sensor Crystallization Monitoring Hysteresis Resonant Frequency

References

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