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Characteristics of a countercurrent reciprocating plate bubble column. II. Axial mixing and mass transfer
Author(s) -
Baird M. H. I.,
Rama Rao N. V.
Publication year - 1988
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.5450660206
Subject(s) - reciprocating motion , countercurrent exchange , mass transfer , mixing (physics) , bubble , mass transfer coefficient , mechanics , dispersion (optics) , chemistry , plug flow , volumetric flow rate , materials science , thermodynamics , analytical chemistry (journal) , chromatography , optics , physics , quantum mechanics , gas compressor
Oxygen absorption from air into water and axial dispersion in the aqueous phase have been measured in a 5 cm diameter reciprocating plate bubble column. The volumetric mass transfer coefficients in semi‐batch conditions were found to increase with agitation and were correlated with the specific power input and air flow rate. Under countercurrent conditions, it was found that axial mixing had little effect and conditions approached plug flow. The volumetric mass transfer coefficients were correlated with specific power input, air and water flow rates. Mass transfer coefficients were estimated using holdup and bubble diameter results. Comparison of the coefficients with the literature values indicated that the bubble surfaces were partially mobile.