[EMmim][NTf 2 ]-a Novel Ionic Liquid (IL) in Catalytic CO 2 Capture and ILs' Applications.

Ionic liquids (ILs) have been used for carbon dioxide (CO ₂ ) capture, however, which have never been used as catalysts to accelerate CO ₂ capture. The record is broken by a uniquely designed IL, [EMmim][NTf ₂ ]. The IL can universally catalyze both CO ₂ sorption and desorption of all the chemisorption-based technologies. As demonstrated in monoethanolamine (MEA) based CO ₂ capture, even with the addition of only 2000 ppm IL catalyst, the rate of CO ₂ desorption-the key to reducing the overall CO ₂ capture energy consumption or breaking the bottleneck of the state-of-the-art technologies and Paris Agreement implementation-can be increased by 791% at 85 °C, which makes use of low-temperature waste heat and avoids secondary pollution during CO ₂ capture feasible. Furthermore, the catalytic CO ₂ capture mechanism is experimentally and theoretically revealed.
(© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.)