High-performance of modified Al₂O₃ hollow fiber membranes for CO₂ absorption at room temperature

To the best of our knowledge, we demonstrate for the first time that modified inorganic hollow fiber membrane contactor can be successfully used for the absorption of CO₂ from a gas mixture using aqueous solutions of monoethanolamine (MEA) at room temperature with extraordinary results. The fluoroalkylsilanized Al₂O₃ hollow fiber membrane contactors containing a high-symmetric distribution of morphological elements showed higher permeability for the CO₂. A CO₂ absorption flux of about 5.4 × 10⁻³ mol m⁻² s⁻¹ was achieved with a single symmetric ceramic membrane, which is considerably higher compared to other conventional polymeric membrane for CO₂ absorption into MEA solutions.