Complete separation conditions for a local equilibrium TCC adsorption unit

Equilibrium theory for simulated moving bed adsorption processes

“…14 leads to This is exactly the same characteristic equation obtained previously for a constant selectivity stoichiometric system. Therefore, the steady-state solution of a nonstoichiometric Gurvitsch system satisfies the same constant state relationship discussed previously in Mazzotti et al (1994) and Chiang (1998).…”

“…We have proved that the steady-state solution of a nonstoichiometric Gurvitsch system is of the same form as a constant selectivity stoichiometric system reported previously (Chiang, 1998). All theorems developed there can now be applied.…”

“…For binary separation systems, exact solution to define the complete separation condition on the m2-m3 space has been given by Storti et al (1993). The analysis has recently been extended to multicomponent systems by Chiang (1998). The results discussed above are, however, limited to cases where all components have the same saturation capacity.…”

“…The relative fluid to solid flow ratio is collected in the parameter rn = (ut/u, -ep)/(l -eP). Here we have defined rn as the net volumetric flow ratio instead of a net mass-flow ratio as done previously (Mazzotti et al, 1994;Chiang, 1998). This is to single out the effect of fluid density in the following discussion.…”

“…With these notations, the necessary and sufficient condition for a four-section TCC adsorption unit to achieve complete separation is (Chiang, 1998) where F is the mass-flow ratio of the feed stream and y p is the feed compositions. Here, we have assumed that the desorbent input is free of any feed component, and the feed contains no desorbent.…”