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Enhanced dispersion resulting from solute exchange between phases
Author(s) -
Grosser Karen A.,
Erickson Kenneth L.,
Carbonell Ruben G.
Publication year - 1991
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.690370405
Subject(s) - dispersion (optics) , taylor dispersion , diffusion , phase (matter) , capillary action , chemistry , thermodynamics , materials science , mechanics , optics , physics , organic chemistry
The enhanced dispersion resulting from solute exchange between phases was investigated experimentally for the case of a long, cylindrical capillary tube, in which a stationary absorbing phase formed a thin annular film around a flowing fluid. Solute diffusion into the stationary phase was analyzed in detail to accurately determine the coupling of film diffusion and hydrodynamic effects. The experimental results and analyses showed an increase in dispersion relative to the usual Taylor effect. The increased dispersion was a function of the relative partitioning of solute between phases and was in quantitative agreement with predictions from previously published theoretical studies.