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Received November 25, 2016
Accepted March 3, 2017
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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
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Effect of sinusoidal Taylor vortex flow on cooling crystallization of L-lysine
Department of Chemical Engineering, Functional Crystallization Center, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-si 17104, Korea
wskim@khu.ac.kr
Korean Journal of Chemical Engineering, July 2017, 34(7), 1896-1904(9), 10.1007/s11814-017-0059-4
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Abstract
An elliptical Couette-Taylor (ECT) crystallizer with a unique sinusoidal Taylor vortex flow was developed to promote the recovery and size distribution of L-lysine crystals in cooling crystallization. When using the ECT crystallizer, the recovery was enhanced to a maximum of 100% with a mean residence time of only 15 min. When comparing the crystallization efficiency, the recovery and size distribution of the L-lysine crystals in the ECT crystallizer were over 33% and 50% higher, respectively, than those in the conventional MSMPR crystallizer and slightly higher than those in the circular Couette-Taylor (CT) crystallizer. This improved crystallization in the ECT crystallizer was explained in terms of the sinusoidal profile of the Taylor vortex intensity. Plus, since the nucleation and growth processes determine the recovery and crystal size distribution, the mean residence time, inner cylinder rotation speed, and feed concentration were all varied to investigate their influence on the crystallization efficiency.
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References
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Sinevic V, Kuboi R, Nienow AW, Chem. Eng. Sci., 41, 2915 (1986)
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Kurotani M, Hirasawa I, J. Cryst. Growth, 310(21), 4576 (2008)
