Abstract
The new process called Adsorptive Distillation is extended by allowing solids loading per stage to vary. The optimization problem is to uncover the unique solids profile which produces the minimum total solids needed for a prescribed separation. Two types of optimum designs are studied: (i) uniform loadings within sections but unequal sectional loadings, and (ii) unequal solids loadings in every stage of the cascade. In both cases, unique optimum profiles and feed stage locations are uncovered. The optimization problems posed above lead to 15% and 22% reductions, respectively, in total solids relative to the idealized case of uniform loadings throughout the cascade. Furthermore, the profiles uncovered for the second problem show solids loading to be always maximum at the feed stage diminishing to minimum loadings at the ends of the cascade. This smooth variation in stage capacity (diamond profile) leads to a condition of zero reflux.
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