[EMmim][NTf₂ ]-a Novel Ionic Liquid (IL) in Catalytic CO₂ Capture and ILs' Applications

Ionic liquids (ILs) have been used for carbon dioxide (CO₂ ) capture, however, which have never been used as catalysts to accelerate CO₂ capture. The record is broken by a uniquely designed IL, [EMmim][NTf₂ ]. The IL can universally catalyze both CO₂ sorption and desorption of all the chemisorption-based technologies. As demonstrated in monoethanolamine (MEA) based CO₂ capture, even with the addition of only 2000 ppm IL catalyst, the rate of CO₂ desorption-the key to reducing the overall CO₂ 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 CO₂ capture feasible. Furthermore, the catalytic CO₂ capture mechanism is experimentally and theoretically revealed.