Transient-state transport in some finite systems. Part I. A simple (two-stage) cascade

Some formal theory of transport in and through a simple (two-stage) cascade is presented. The treatment relates to a constant diffusion coefficient with solution or sorption obeying Henry's law. Detailed consideration is given to the time-dependence of the pressure of diffusant in the intermediate volume of the cascade. Time-lags associated with transport through the cascade have been evaluated and some of their properties indicated. The separation of binary gas mixtures is considered.