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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 21, 2001
Accepted December 12, 2001

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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Slug Characteristics of Polymer Particles in a Gas-Solid Fluidized Bed

See Hoon Lee Dong Hyun Lee Sang Done Kim^†

Department of Chemical and Biomolecular Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

kimsd@cais.kaist.ac.kr

Korean Journal of Chemical Engineering, March 2002, 19(2), 351-355(5), 10.1007/BF02698428

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Abstract

The slug characteristics (frequency, rising velocity and length) have been determined by analyzing pressure fluctuations in a fluidized bed (0.38 m-I.D.×4.4 m-high) of linear-low-density-polyethylene (LLDPE) and polypropylene (PP) particles. The slug characteristics of LLDPE and PP particles have been determined as a function of gas velocity (0.6-1.2 m/s) and the axial height (0.65-1.15 m) from the distributor. The rising velocity and vertical length of slug increase with increasing superficial gas velocity and the axial height of the bed. The slug shape of LLDPE particles is found to be the square-nose whereas that of PP particles is the round-nose. The slug frequency and its length have been correlated in terms of the excess fluidizing velocity, column diameter and bed height based on the data from the present and previous studies.

Keywords

Slug Frequency Slug Rising Velocity Polymer Particles Gas Fluidized Bed

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