Akademik Veri Yönetim Sistemi
Chemical Engineering Communications, 2024 (SCI-Expanded)
Pervaporation separation of isopropanol–butanol–ethanol (IBE) aqueous mixture was carried out using polydimethylsiloxane (PMDS) membranes containing 5, 10, and 15 wt.% of nanosized SiO2. PDMS/SiO2 membranes prepared by solution-casting technique were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FESEM). Sorption experiments were performed at 30 °C, 40 °C, and 50 °C, and the interaction parameters between the pure components and the membrane were calculated. Further, the activity coefficients, excess Gibbs energies, and binary interaction parameters of organic-water binary systems at different temperatures were estimated using the UNIFAC method. A single-component permeation through pristine PDMS and nanocomposite PDMS membranes, as well as the pervaporation separation performance of PDMS-based membranes at different temperatures for a model IBE mixture with a concentration of 20 g·L−1, were investigated. The pervaporation results showed that the highest butanol permeability (15514 Barrer) and selectivity (102.6) values were obtained for 5 wt.% and 15 wt.% SiO2-filled PDMS membranes at 30 °C, respectively.