Applied of Phase Equilibrium to Simulate Pressure Swing Distillation of 1-Butanol + Water Mixtures

azeotrope which cannot be separated using conventional distillation.Azeotropic distillation techniques have been developed quite a lot, one of which is Pressure Swing Distillation (PSD).In this study, the computational simulation was performed using commercial software Aspen Plus and thermodynamic model UNIQUAC.The configuration of operating conditions and equipment in the PSD for the 1-butanol and water system has effects on the need for supporting equipment and its techno-economic analysis.From the results of this simulation study, it is obtained that the PSD configuration with a High Pressure (HP) to Low Pressure (LP) design can obtain a 1-butanol product with a purity of 99.98% with a TAC (Total Annual Cost) of 0.64 (10g USD/year) and the cost of separating 1-butanol is 0.085 USD/kg and the cost for energy is 0.03 USD/kg.