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

Publication history: Received September 23, 2006
Accepted October 17, 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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General applications of modified Stokes expression for modeling and scale-up of expanded beds

Yoon Mi Lee O-Yul Kwon¹ Keun Garp Ryu^†

School of Chemical Engineering and Bioengineering, University of Ulsan, Ulsan 680-749, Korea ¹Department of Environmental Engineering, Seoul National University of Technology, Seoul 139-743, Korea

Korean Journal of Chemical Engineering, March 2007, 24(2), 261-264(4), 10.1007/s11814-007-5039-7

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Abstract

The modeling of the behavior of expanded beds using Richardson-Zaki correlation in combination with the modified Stokes expression developed by Chae et al. [1] was successfully applied to the cases of small expanded beds (1 cm in column diameter) containing two different polydisperse particles used for ion-exchange operations, Chelating excellose (70-210 μm in diameter, 1.21 g/cm3 in density) and Streamline DEAE (100-300 μm in diameter, 1.20 g/cm3 in density). Empirical parameters determined for the modeling of the expansion of these small-beds (1 cm diameter) were found to have values similar to those for the case of larger expanded beds (2.5 cm in diameter) containing the same particles. This indicates that the modeling method can be utilized for the scale-up purposes of the expanded beds with various feed solutions.

Keywords

Expanded Bed Modeling Scale-up Stokes Expression

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