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Gas‐liquid mass transfer and pressure drop in pulp bed with flexible fibers as solid supports
Author(s) -
Hsu C. L.,
Hsieh J. S.
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690321014
Subject(s) - pressure drop , mass transfer , pulp (tooth) , chemistry , superficial velocity , chromatography , mechanics , flow (mathematics) , medicine , physics , pathology
Abstract The volumetric mass transfer coefficients between oxygen and water in a pulp bed have been determined by the gas‐liquid reaction method with an enhancement factor approximately equal to one. The coefficients ranged from 0.08 s −1 at 13% to 0.34 s −1 at 19% solids content in the pulp bed, values that are close to those for comparable trickle beds. No liquid flow over the pulp bed (13–19% solids content) occurred under the operating conditions. The results showed that gas‐liquid mass transfer was affected only by the solids content of the pulp bed rather than by the oxygen superficial velocity (0.4 to 1.2 cm/s). The gas pressure drop across the pulp bed was also predicted by Ergun's equation using an estimated effective diameter for the fiber flocs.