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=0.81
uGO1.20Z-0.62
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