Carbon capture and storage (CCS) has attracted worldwide interest because CO2 makes a significant contribution to global warming and climate change as a major greenhouse gas.  Ionic liquids are promising absorbents for carbon capture because of their negligible vapor pressures, wide liquid range, high thermal stabilities, and tunable properties. This presentation focuses on the recent advances in chemical absorption of CO2 using functionalized ionic liquids including amino acid-based ionic liquids, azole-based ionic liquids, phenol-based ionic liquids, and so on. The strategies on how to enhance CO2 absorption capacity, reduce CO2 absorption enthalpy, and improve CO2 absorption kinetics are presented. The absorption mechanisms by these functionalized ionic liquids are rationalized at the molecular level through a combination of theoretical calculation and spectroscopic investigation. Especial attentions are directed towards the latest developments in carbon capture by non-amino anion-functionalized ionic liquids.  This work is sponsored by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy.

Strategies for improving carbon dioxide chemisorption by functionalized ionic liquids

248th National Meeting (2014)

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