Letter | Published:

Variation of Bed Height with Bubbling in an Air/Catalyst Fluidized Bed

Naturevolume 199page898 (1963) | Download Citation

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Abstract

DURING a preliminary investigation of mass transfer from bubbles in a fluidized bed composed of cracker catalyst (mean particle size 60µ), it was noticeable that the presence of bubbles caused a reduction of the height of the bed which was obtained when either a bubble flowstream or individual bubbles were injected into the bed. It appears that gas flows preferentially from the continuous phase into the bubble, and that the hold-up of gas in the continuous phase is reduced because the rising velocity of the bubbles is about 100 times that of the gas in the continuous phase.

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Affiliations

  1. Department of Chemical Engineering, University College of Swansea

    • J. F. RICHARDSON
    •  & L. DAVIES

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DOI

https://doi.org/10.1038/199898b0

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