Tailoring of water swollen PVA membrane for hosting carriers in CO2 facilitated transport membranes

By optimizing the CNT loading and pH of the membrane, the CO2 permeance was increased from 0.18 ± 0.02 m3 (STP)/m2 bar h to 0.44 ± 0.02 m3 (STP)/m2 bar h at a constant CO2/N2 selectivity of 60 ± 1. The membrane swelling degree was also increased from 154 ± 20 to 254 ± 30. The thickness of the selective layer was reduced from ∼0.85 µm to 0.45 µm which resulted in further increase in permeance to 0.48 m3 (STP)/m2 bar h. The developed membrane showed a stable operation over a period of 1 month.