Controllability of different multicomponent distillation arrangements

In this work, the controllability of different distillation arrangements for the separation of ternary mixtures is compared. At the same time, the energetic efficiency of each one of the arrangements is analyzed. Specifically, the direct and indirect sequences of columns, the columns with side sections, and the divided wall column (DWC) are considered. To compare the controllability of the different arrangements, the preferred control structures are searched. For the DWC, operating conditions that favor controllability are discussed. Also, the arrangements have been compared under different design conditions.