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Language: English

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

Publication history: Received January 12, 2014
Accepted April 16, 2014

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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Entrainment of Geldart C particles in fluidized beds with binary particles

Joon Hwan Kim Jong Wook Bae JaeWook Nam Sang Done Kim¹ Jeong-Hoo Choi² Dong Hyun Lee^†

School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan, Suwon 440-746, Korea ¹Department of Chemical and Biomolecular Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea ²Department of Chemical Engineering, Konkuk University, Seoul 143-701, Korea

dhlee@skku.edu

Korean Journal of Chemical Engineering, November 2014, 31(11), 2094-2100(7)
https://doi.org/10.1007/s11814-014-0113-4

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Abstract

The effects were determined of the mass ratio of Geldart C particles on the total amount of particles (Mfine/Mtotal=0-50 wt%), superficial gas velocity (Ug=0.5-1.0 m/s) and coarse particle size distribution (mono, binary, flat, and Gaussian type) on entrainment of Geldart C particles in a bubbling fluidized bed with binary particles (coarse particles:dp=0.512 mm, ρs=2,339 kg/m3 and Geldart C particles: dp=13 μm, ρs=4,455 kg/m3). The initial entrainment rate increases with increasing Ug. At Ug of 0.5 and 0.7 m/s, the initial entrainment rate slightly increases initially and then remains almost constant with increasing mass ratio (Mfine/Mtotal). At higher gas Ug of 0.85 and 1.0 m/s, the initial entrainment rate increases with increasing the mass ratio (Mfine/Mtotal) up to 30 wt%, after which the increasing slope of the initial entrainment rate decreases with increasing the mass ratio (Mfine/Mtotal). Also, the decrease in the coefficient of entrainment rate is equal to the increase in (Mfine/Mtotal) at the corresponding Ug. The average particle size of the entrained particles is about 12-16 μm at Ug of 0.5-1.0 m/s.

Keywords

Coarse Particle Geldart C Particle Fluidized Bed Entrainment Rate Constant Entrainment Rate

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