A novel IL / MOF nanocomposite tailored for trace SO 2 efficient capture based on synergistic effects

Due to its toxicity and corrosiveness, it is of enormous significance to efficiently capture and recover sulfur dioxide (SO 2 ) from flue gas and natural gas. Herein, a new type of IL/MIL‐0.7 composite was precisely designed to meet this challenge, which exhibits a high adsorption capacity for SO 2 (13.17 mmol g −1 ) at 298 K and 1.0 bar while excludes almost completely carbon dioxide (CO 2 , 0.27 mmol g −1 ) and nitrogen (N 2 , 0.07 mmol g −1 ). The high IAST selectivity (at least 11,925) of IL/MIL‐0.7 for SO 2 /CO 2 can be achieved within the whole test pressure range. In addition, the breakthrough experiment also confirmed the excellent performance of the composite for deep removal of 2000 ppm SO 2 . Furthermore, the IL/MIL‐0.7 composites can maintain excellent performance after four adsorption/desorption cycles and the thermostability can up to ~450 K. Therefore, this stable IL/MOF composite has the potential application as an effective adsorbent for SO 2 removal from flue gas and natural gas.