Volumetric mass transfer
The overall mass transfer coefficient for sparingly soluble
gases is commonly controlled by the liquid side film resistance.
Thus the overall mass transfer coefficient is equal to the liquid
side mass transfer coefficient. The overall volumetric gas–liquid
mass transfer coefficient (kLaGL) is mainly determined by the
interfacial area (aGL), which for packings is usually a function
of the specific geometric surface area of the packing and of the
liquid holdup. The liquid side mass transfer coefficient (kL) is