Energy Optimization of Pressure-Swing Azeotropic Distillation Systems

Global energy optimization strategies in steady-state pressure-swing distillation (PSD) systems were studied and analyzed using the minimum-boiling homogeneous azeotropic system of tetrahydrofuran (THF)-water. Using global energy optimization strategies can significantly reduce the energy consumption as opposed to local energy optimization strategies. Using the proposed approach reduced the energy requirements for the considered chemical plant including the THF-water PSD system, which reduced the energy requirements of the plant by more than 60%. The PSD system is part of the whole plant, and it should be dealt with accordingly.