Mass transfer characteristics were investigated in a counter-current bubble column packed with cylindrical screen rings and correlated with the axial dispersion coefficient measured by an impulse response technique. Absorption of CO₂ by water in the column was used for this investigation. The volumetric coefficient of liquid phase mass transfer was found to increase with increasing superficial gas velocity and axial dispersion coefficient of liquid. The relationship could be expressed by the following correlation:
K^α_L = 0.036 V_g^0.76D^2.22