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 cm²/g, a pore volume of 0.4 cm³/g, and an aperture of about 1 nm. This MOF enables both high SO₂ adsorption capacity up to 8.0 mmol/g at 0.92 bar and room temperature and a high SO₂/CO₂ selectivity of 44, resulting in excellent SO₂ separation upon a ECUT-77 column from a SO₂/CO₂ mixture containing 2000 ppm of SO₂.