Preparation of HKUST-1/PEI mixed-matrix membranes: Adsorption-diffusion coupling control of small gas molecules

HKUST-1 nanocrystals (50–80 nm) were homogeneously dispersed in a polyetherimide (PEI) polymer matrix. The use of capping agent (sodium formate) prevented the agglomeration casting solution. highly found to strengthen interactions with PEI and minimize interfacial holes by providing more accessible Cu unsaturated metal sites for CO bonds on five-membered rings membrane loaded 30 wt % (30-N-HKUST-1/PEI) showed high H2 permeability (193.3 Barrer at 25 °C under 1.5 bar) good ideal H2/CH4 H2/CO2 selectivity factor 101.7 20.6 single gas test, respectively. In mixture it also separation performance, i.e., 82.4 16.5 was measured, 30-N-HKUST/PEI tested different temperatures (25–100 °C), pressures (0–3 various time (5–72 h) study performance realistic conditions thus be further considered syngas.