High Adsorption Capacity and Selectivity of SO2 over CO2 in a Metal–Organic Framework

Herein, we report a new metal–organic framework (MOF), namely, ECUT-77, which is built on rod-shaped secondary building units, showing a high Brunauer–Emmett–Teller surface area of 760.3 cm 2 /g, a pore volume of 0.4 cm 3 /g, and an aperture of about 1 nm. This MOF enables both high SO 2 adsorption capacity up to 8.0 mmol/g at 0.92 bar and room temperature and a high SO 2 /CO 2 selectivity of 44, resulting in excellent SO 2 separation upon a ECUT-77 column from a SO 2 /CO 2 mixture containing 2000 ppm of SO 2 .