Hydrodynamic characteristics of a three-phase inverse fluidized-bed column

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · AIChE Journal

DOI:https://doi.org/10.1002/aic.690420710· OSTI ID:367797

Ibrahim, Y A.A.; Briens, C L; Margaritis, A; Bergongnou, A ^[1]

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1. Univ. of Western Ontario, London, Ontario (Canada). Dept. of Chemical and Biochemical Engineering

Gas-liquid-solid inverse fluidized beds were studied, in which the gas and the continuous liquid phase flow countercurrently fluidizing particles that are lighter than the liquid. Conductivity and static pressure measurements were combined to provide the vertical profiles of the gas, liquid and solid holdup, in beds of 4- or 6-mm polypropylene particles with a density of about 870 kg/m{sup 3}. Various bed heights were obtained with different measurement methods. The minimum fluidization velocity was estimated using the bed static pressure gradient. A new transition velocity, called the uniform fluidization velocity, was identified using conductivity measurements. This is the superficial liquid velocity at which the fluidization quality becomes the same throughout the bed.

• OSTI ID: 367797
• Journal Information: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 7 Vol. 42; ISSN AICEAC; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DENSITY
DISTRIBUTION
FLUIDIZED BEDS
GAS FLOW
HYDRODYNAMICS
LIQUID FLOW
MULTIPHASE FLOW
PARTICULATES
SOLIDS FLOW