The results also explain the reason of the enhancement of mass
transfer with film flow. It is because with the increase of the liquid
flow rate, the fluctuation amplitude and the efficient mass transfer
area will increase correspondingly. In some cases, the interfacial
area can be larger than the plate because of the wave. And the
increased transfer area can be considerable when the plate area
is large enough. In this way, the mass transfer in the film flow
absorber can be improved significantly.