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

Abstract

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 5.4×10−3molm−2s−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.