Liquid-phase mass transfer in a packed bed was investigated for flow conditions for which the effect of neglecting axial transfer in the prediction of concentration distributions would most likely be significant. The purpose of this study was twofold: 1) to obtain experimental concentration data suitable for comparison with future theoretical studies, and 2) to analyze these data in terms of calculated effective axial and radial diffusivities and Peclet numbers.
Frandolig, John Earnest and Fahien, R. W., "Liquid-phase mass transfer at low flow rates in a packed column" (1964). Ames Laboratory Technical Reports. 56.