Analysis of Control Properties of Conventional and Nonconventional Distillation Sequences

Abstract

In this paper a controllability analysis of seven distillation sequences for the separation of ternary mixtures using singular value decomposition and closed-loop responses under feedback control is presented. The results show that nonconventional distillation sequences such as thermally coupled distillation sequences can have better control properties than nonintegrated schemes, such as the conventional direct and indirect sequences, distillation systems with side streams, and sequences with three conventional distillation columns.