CONTROL AND ENERGY SAVINGS OF THE PETLYUK DISTILLATION SYSTEM

The Petyuk distillation system has gained considerable attention because of the energy savings it can provide with respect to the conventional distillation sequences. Since the structure of the Petlyuk system is more complex, its controllability properties may be adverse with respect to the conventional systems. In this work a closed-loop analysis of the Petlyuk distillation system is presented. Special attention is given to show how the control properties change when different operating conditions are used. The results show that the control properties of the Petlyuk column can improve if some degradation in the energy consumption level is allowed.