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Control of mean residence time difference for particles with wide size distribution in fluidized beds

Libo Zhang, Jun Lia

2017enmean residence timefluidized bedsparticle sizebafflegas-solid reactions

Abstract

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For non-catalytic gas-solid reactions, it is desirable to match the mean residence time (MRT) of a particle and its complete conversion time (τ) in fluidized beds. In this study, the MRTs of the particles with wide size distribution (WSD) were characterized and tuned in a continuous fluidized bed by varying the gas velocity and by the introduction of baffle. For the WSD particles with maximum diameter ratio of 4, the MRT ratio of the coarse to the fine particles increases from 1.1 to 1.7 with only changes in gas velocity. By introducing baffles into the fluidized bed under a relatively high gas velocity, the MRT difference for the different size particles becomes more pronounced. With four layers of baffles, the MRT ratio of the coarse to the fine particles can reach 5.5. This study provides a new way to adjust the MRT difference for particles with WSD.

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Cite This Work

@article{e1b1c029-14af-48f3-850d-084d8a768a71,
  title={Control of mean residence time difference for particles with wide size distribution in fluidized beds},
  author={Libo Zhang and Jun Lia},
  year={2017},
  language={en}
}
TY  - JOUR
TI  - Control of mean residence time difference for particles with wide size distribution in fluidized beds
AU  - Libo Zhang
AU  - Jun Lia
PY  - 2017
LA  - en
ER  -

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