Optimal design of multicomponent countercurrent adsorption separation processes involving nonlinear equilibria

Abstract A simple model, based on equilibrium theory, for simulating countercurrent adsorption separation processed involving multiple components and nonlinear equilibrium has been developed. The reliability of this model has been tested by comparison with a detailed model in the context of the separation process for the aromatic fraction C 8 by adsorption on zeolites. Based on this model, a simple and accurate procedure has been developed for designing optimal separation units, where adsorbent and desorbent requirements are minimized while enrichments of both extract and the raffinate are maximized. The emphasis has been placed on the role of the desorbent and the effect of the physical state of the fluid, i.e. vapor or liquid phase operation.