Capture and Conversion of CO₂ from Ambient Air Using Ionic Liquid-Plasma Combination

Climate change is considered one of the main challenges in this century, and CO₂ emissions significantly cause it. Integrating CO₂ capture, storage, and conversion is proposed to solve this problem. 1-Butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid was employed to capture and store CO₂ from the air and subsequently converted into CO using non-thermal plasma. Moreover, we also tested the CO₂ capture and storage capacity of water from different sources, e.g., Milli-Q, deionized water, and tap water. [Bmim]Cl solution captured CO₂ from the air and then converted to CO after 24 h using plasma. In comparison with water (Milli-Q water, deionized water, and tap water), CO production was increased by 28.31% in the presence of water (Milli-Q water, deionized water, and tap water) + [Bmim]Cl. It suggests that this method could be a promising way to capture, store, and convert CO₂ from air at atmospheric pressure and room temperature as an effort to reduce carbon emission.