CO₂ removal with 'switchable' versus 'classical' ionic liquids

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: E. Privalova, M. Nurmi, M.S. Marañón, E.V. Murzina, P. Mäki-Arvela, K: Eränen, D.Yu. Murzin, J.-P. Mikkola
Publication year: 2012
Journal: Separation and Purification Technology
Journal acronym: SEP PURIF TECHNOL
Volume number: 97
Start page: 42
End page: 50
Number of pages: 9
ISSN: 1383-5866


Switchable ionic liquids (SILs) are promising solvents for CO2 separation due to their high CO2 capturing efficiency and easy preparation compared to 'classical' ionic liquids. Considering viscosity, the present study has demonstrated that SILs formed at least two times stronger chemical bonds with CO2 than studied classical ionic liquids (ILs). Furthermore, the reversible properties of SILs were confirmed by evaluation of different regeneration methods. On average, molar fractions of CO2 were more than 0.3 outperforming acetate-based ILs (molar fraction of CO2 around 0.25) and more than ten times the capacity of physical ionic liquids (molar fraction 0.02). Consequently, SILs are found to be efficient CO2 absorbents operating at atmospheric pressure.


CO2 capture, Ionic liquids, Regeneration, Switchable solvents, Viscosity

Last updated on 2020-30-05 at 05:45