Abstract
Carbon dioxide absorption rates into water were measured to determine volumetric mass transfer coefficients, kLa, in bubble and slug flow regimes of gas-liquid two-phase upflow through a 0.030m i.d. vertical tube. Axial local values of kLa decreased rapidly downstream from gas inlet. Axial averaged values of kLa, which is denoted by (kLa)z, were affected by gas velocity, uGO and distance from gas inlet, z, being correlated by the following equations:
(kLa)z=0.81uGO1.20Z-0.62
