A high-flux polyimide hollow fiber membrane to minimize footprint and energy penalty for CO2 recovery from flue gas

► 6FDA-DAM:DABA(4:1) has a CO2/N2 selectivity of 20 and CO2 permeability of 224 Barrers. ► Defect-free 6FDA-DAM:DABA(4:1) hollow fibers have a pure CO2 permeance of 520 GPUs. ► ZIF-8 mixed matrix membrane: good adhesion to polymer, 250% improvement in permeability. ► CO2 capture costs of $27/ton, system footprint is 10x smaller than spiral-wound modules.