Ternary mass transfer in a wetted wall column. Significance of diffusional interactions. Part II. Equimolar diffusion

Abstract

One important and distinguishing feature of mass transfer in systems with three or more species, i.e. muIticomponent systems, is the necessity of taking diffusional interaction, or coupling, effects into account in the calculation of interfacial mass transfer rates. A consequence of diffusional interaction effects in multi component distillation in a continuous contact (packed, wetted wall etc.) column is that the constituent pseudo-binary heights of transfer units HTU, in either fluid phase (vapour and liquid) will be unequal to one other, and so will be the overall parameters.