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Hydrodynamics and mass transfer characteristics of a scheibel extractor. Part II: Backmixing and stage efficiency
Author(s) -
Bonnet J. C.,
Jeffreys G. V.
Publication year - 1985
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.690310514
Subject(s) - mass transfer , drop (telecommunication) , continuous phase modulation , chemistry , chromatography , phase (matter) , thermodynamics , mixing (physics) , stage (stratigraphy) , extractor , pressure drop , packed bed , analytical chemistry (journal) , mechanics , process engineering , mechanical engineering , physics , telecommunications , organic chemistry , quantum mechanics , computer science , engineering , paleontology , biology
Abstract The transfer of acetone between the toluene phase (dispersed) and the aqueous phase (continuous) has been measured along the length of a four‐stage Scheibel column packed with material preferentially wetted by the dispersed phase. (A Scheibel stage is defined as one mixing section plus one packing section.) The column concentration profiles were obtained by applying a new technique developed for this investigation. A parameter model‐fitting exercise has been developed to select the most appropriate mathematical model that quantifies the extent of backmixing in the dispersed and continuous phases and evaluates the stage efficiency. Overall dispersed phase mass transfer coefficients were estimated using the drop size and holdup data presented in Part I, and these have been compared with the published correlations based on single drop mechanisms.