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Applicability of axial dispersion model to analyze mass transfer measurements in bubble columns
Author(s) -
Deckwer W.D.,
NguyenTien K.,
Kelkar B. G.,
Shah Y. T.
Publication year - 1983
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.690290607
Subject(s) - bubble , mass transfer , dispersion (optics) , mechanics , materials science , thermodynamics , physics , optics
The applicability of axial dispersion model ( ADM ) for the measurement of the gas‐liquid mass transfer coefficient ( k L a ) in bubble columns is discussed. It is shown that the misinterpretation of the concentration jump near the column inlet can lead to wrong conclusions regarding the mass transfer rates. It is further illustrated that some reported k L a dependencies on the superficial liquid velocity and the axial distance are resulted from the use of an incorrect model and can be rectified by an application of ADM . Finally, it is shown that ADM can be effectively used to calculate k L a a for: (a) highly viscous liquids, (b) in the presence of chemical reaction, (c) slurry reactors, and (d) the columns with different liquid inlet locations.