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Gas holdup above the bed surface and grid gas jet hydrodynamics for three phase fluidized beds
Author(s) -
Catros A.,
Bernard J. R.,
Briens C.,
Bergougnou M. A.
Publication year - 1985
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450630508
Subject(s) - fluidized bed , jet (fluid) , mechanics , superficial velocity , three phase , phase (matter) , chromatography , materials science , chemistry , thermodynamics , flow (mathematics) , physics , organic chemistry , quantum mechanics , voltage
Abstract A three dimensional column was used to study the hydrodynamics of a three phase system: air, water and 3 mm glass beads. Various effects of the grid jets on bed hydrodynamics were investigated for both increasing and decreasing liquid superficial velocities. Three regimes were observed: spouted bed, spouted fluidized bed and three phase fluidized bed. The hydrodynamics of the two phase region above the bed was also studied. The gas holdup increased when the gas superficial velocity was increased but decreased when the liquid superficial velocity was increased. A correlation for the estimation of the gas holdup as a function of gas and liquid superficial velocities was established.