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9.6 Operation of the SMB Unit  245

























             Fig. 9-16. Competitive adsorption isotherms: experimental (points) and model (lines) results.

























             Fig. 9-17. Chromatographic response to a feed pulse. Comparison between experimental (points) and
                                                          –1
             model (lines) results. (Pulse during 7.5 min; flow rate: 5 mL min .)
             optimization problem can be simplified if we take into account the functions of the
             different sections of a TMB system. Section I, located between the eluent and extract
             nodes, must provide the complete regeneration of the adsorbent phase, so the solid
             coming out this zone is recycled to section IV completely clean of the two compo-
             nents. In other words, both components A and B must move upwards, following the
             liquid phase. Because component B is the more retained species, we have to consider
             only the constraint considering this component; i.e., if the constraint is fulfilled for
             species B, the constraint considering the less retained component A will be always
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