Pressure Swing Distillation: Heat Integration and Economics

Abstract

ABSTRACT This review article explores the azeotropic mixtures and investigates the application of Pressure Swing Distillation (PSD) as an effective separation method. Azeotropic mixtures have compositions that result in vapor and liquid phases with the same composition, making them challenging to separate using simple distillation. The content offers a structured approach to design, optimize, and execute separation processes, emphasizing the importance of heat integration, process optimization, control strategies, economic considerations, and environmental impacts within the context of PSD. Furthermore, these findings provide valuable insights for practitioners in the selection of appropriate heat-integration, optimization methods, and balancing the trade-off between economy and controllability when selecting an appropriate separation technique by balancing the economic benefits and controllable performance of different methods. PSD is reviewed detailing thermodynamic equilibrium, selection of pressure and column sequence, heat integration, optimization techniques, control strategy, and economics. The recent progresses of PSD are evaluated to determine how different heat integration techniques are useful in achieving cost and energy savings. The review provides valuable guidance to researchers and engineers navigating the complexities of azeotropic mixture separation, with a specific focus on PSD practical applications.