276896 Using Structure-Property Relationships to Design Reversible Ionic Liquids for CO2 Capture

Tuesday, October 30, 2012
Hall B (Convention Center )
Jackson R. Switzer1, Amy L. Rohan1, Kyle M. Flack2, Emily C. Nixon2, Amber C. Rumple2, Elizabeth J. Biddinger1, Pamela Pollet2, Charles L. Liotta2 and Charles A. Eckert1, (1)School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, (2)School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA

Reversible ionic liquids (RevILs) have been developed as alternatives to traditionally cited CO2 capture solvents such as monoethanolamine (MEA). RevILs capture CO2 through chemical reaction of CO2 with an amine functionality to form an ionic liquid. The resulting ionic liquid is then capable of absorbing additional CO2 through physical absorption. The design of reversible ionic liquids has been an important focal point in our research group. Using structure-property relationships we have shown an ability to tune the relevant CO2 capture properties by altering the structure of the starting RevIL. Properties targeted include CO2 capture capacity, ionic liquid viscosity, temperature of CO2 release, temperature of RevIL evaporation, and the enthalpy of CO2 absorption. We have examined several additional modifications to the structure of our RevILs and investigated their effects on CO2 capture properties. Our progress on developing these structure-property relationships to further the design of optimized solvents for CO2 capture will be discussed.

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