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