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Interphase mass transfer in a gas fluidized bed

✍ Scribed by C. Chavarie; J.R. Grace

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 824 KB
Volume: 31
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(76)80046-2

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✦ Synopsis

Mass transfer rates have been measured for bubbles containing ozone injected into an air-fluidized two-dimensional bed of particles. The overall mass transfer coefficient, corrected for unsteady bubble growth effects and with entrance effects eliminated, lies between predictions of models which assume that throughflow and diffusion are both additive and rate-controlling and those models which assume that mass transfer is governed by diffusion at the cloud boundary. The experimental value is consistent with a model which bases mass transfer purely on the throughflow predicted by Murray. Failure to account for bubble growth leads to drastic overestimation of the mass transfer coefficient.

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