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

Publication history: Received February 26, 2002
Accepted May 30, 2002

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

Won Namkung^{1 2} Sung Won Kim¹ Sang Done Kim^1†

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.

Keywords

FCC Regenerator Bubble/Void Gas Mixing

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