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Received February 26, 2002
Accepted May 30, 2002
articles 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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Hydrodynamic Characteristics of a FCC Regenerator

1Department of Chemical and Biomolecular Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea 2Smelting Reduction Research Team, RIST, Pohang 790-600, Korea
kimsd@kaist.ac.kr
Korean Journal of Chemical Engineering, January 2003, 20(1), 110-115(6), 10.1007/BF02697194
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Abstract

The hydrodynamic and gas mixing characteristics have been determined in a FCC regenerator (0.48 m I.D.×3.4 m high) with FCC particles. Solids holdup in the dense bed decreases with increasing gas velocity, but it increases in the freeboard region. The bubble/void fraction increases with an increase along the bed height at a given gas velocity and increases with increasing gas velocity at a constant bed height. Backmixed tracer gas at the wall region is higher than that at the center region of the bed. The gas backmixing coefficient decreases with increasing gas velocity.

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