Decoupling Control of a Multi-Component Distillation Column Using a Pseudo Binary Model

Abstract

When designing the decoupling control system of a multi-component distillation column by using state variable feedback, the number of state variables to be fedback increases according to the number of components.
To overcome the above short-coming, it is proposed in this paper to design the decoupling control system with a pseudo binary model. It was found that the pseudo binary model obtained from only two key-components does not give a satisfactory result for the decoupling control system design. Then a new pseudo binary model was derived by providing the direction of the composition change around the steady-state condition.
It is confirmed that the decoupling control system designed by use of this pseudo binary model has almost the same performance as that designed by use of the multi-component model.