Pervaporation Dehydration of Isopropanol at Various Temperatures and Pressures in Batch Mode with HybSi membrane

Abstract

Pervaporation experiments were conducted using a HybSi membrane (50 cm²) to dehydrate binary isopropanol-water mixtures. The pervaporation of pure water was also tested at 70, 80, and 90 °C under a permeate pressure of 50 Torr, with a recirculation flow rate of 2 L/min. Each experiment began with a 500 g solution containing an initial IPA mass fraction of 0.8. Permeate samples were collected at different time intervals under permeate pressures of 28 and 50 Torr, corresponding to operating temperatures of 70, 85, and 90 °C. Additionally, a validation experiment was performed at 90 °C and 72 Torr.