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

Abstract

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.

Confining organic cations in metal organic framework allows molecular level regulation of CO2 capture

“…Ionic liquids (ILs) are a large family of compounds composed of organic cations and organic/inorganic anions with unlimited theoretical diversity and have been widely investigated in the carbon capture field [19][20][21] because of structural and functional flexibility, excellent TingTing Wang and Biao Meng contributed equally to this study. chemical and thermal stability, and high CO 2 affinity.…”

“…Ionic liquids (ILs) are a large family of compounds composed of organic cations and organic/inorganic anions with unlimited theoretical diversity and have been widely investigated in the carbon capture field 19–21 because of structural and functional flexibility, excellent chemical and thermal stability, and high CO 2 affinity 22–27 . Recently, the hybridization of MOFs with ILs has attracted growing attention in many applications such as gas adsorption and separation, heterogeneous catalysis, and energy storage 28,29 .…”

Embedded Mo/Mn Atomic Regulation for Durable Acidity-Reinforced HZSM-5 Catalyst toward Energy-Efficient Amine Regeneration

“…1 Chemisorption processes, such as amine scrubbing by using aqueous monoethanolamine (MEA) solutions, have been widely studied as benchmark processes for postcombustion CO 2 capture. 2,3 However, inherent parameters such as restricted proton transfer and high endothermic carbamate (RNHCOO − ) decomposition in an alkaline environment considerably affect the temperature dependence of the desorption of CO 2 in CO 2 -rich amine solutions. A large quantity of high-enthalpy steam is required to enable a CO 2 capture system to achieve a high CO 2 desorption rate at 110−130 °C; thus, such a system suffers high energy consumption of water vaporization, amine volatilization, and corrosion.…”

“…Technological advancements in the mitigation of climate change mainly rely on the use of carbon dioxide (CO 2 ) capture and storage (CCS) systems to ameliorate artificial CO 2 emissions . Chemisorption processes, such as amine scrubbing by using aqueous monoethanolamine (MEA) solutions, have been widely studied as benchmark processes for postcombustion CO 2 capture. , However, inherent parameters such as restricted proton transfer and high endothermic carbamate (RNHCOO – ) decomposition in an alkaline environment considerably affect the temperature dependence of the desorption of CO 2 in CO 2 -rich amine solutions. A large quantity of high-enthalpy steam is required to enable a CO 2 capture system to achieve a high CO 2 desorption rate at 110–130 °C; thus, such a system suffers high energy consumption of water vaporization, amine volatilization, and corrosion. − State-of-the-art catalytic CO 2 desorption systems equipped with solid acid catalysts (SACs) play a promising role in promoting proton and electron transfer and might be able to reduce the CO 2 desorption temperature by approximately 5–10 °C while ensuring high CO 2 desorption performance.…”

Surpassing the Performance of Phenolate‐derived Ionic Liquids in CO2 Chemisorption by Harnessing the Robust Nature of Pyrazolonates

“…[1][2][3][4][5][6] Particularly, ILs are recognized as one of the most promising categories of liquid sorbents in CO 2 capture and separation. [7][8][9][10] Their advanced thermal stability, non-volatile nature, high CO 2 solubility, and tunable interaction strength with CO 2 provide a potential solution to the technique bottleneck being encountered by the currently employed aqueous amine solutions in carbon capture (e. g., inferior stability and high energy consumption in CO 2 release). [4,11] Although physisorption ILs were first employed in CO 2 capture as well as membrane-based CO 2 separation, their applications are limited by the relatively low CO 2 solubility.…”