Actions for Reversible Ionic Liquids as Double-Action Solvents for Efficient CO{sub 2} Capture [electronic resource].

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Reversible Ionic Liquids as Double-Action Solvents for Efficient CO{sub 2} Capture [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2011.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Georgia Institute of Technology, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We have developed a novel class of CO₂ capture solvents, Reversible Ionic Liquids (RevILs), that offer high absorption capacity through two modes of capture: chemical reaction (chemisorption) and physical solubility (physisorption). These solvents are silicon containing alkaline compounds such as silylamines that form a liquid salt (ionic liquid) upon reaction with CO₂. Subsequently, modest elevations in temperature reverse the reaction and yield pure CO₂ for sequestration. By incorporating Si in the molecules we have reduced the viscosity, thereby improving the mass transfer rates of CO₂ absorption/desorption and decreasing the processing costs for pumping the solvent. In this project, we have made systematic changes to the structure of these compounds to improve several physical and thermodynamic properties important for CO₂ capture. Through these structure-property paradigms, we have obtained a RevIL which requires only a third of the energy required by conventional aqueous MEA process for 90% CO₂ capture.
Report Numbers
E 1.99:1048880
Subject(s)
Note
Published through SciTech Connect.
09/30/2011.
Charles Eckert; Charles Liotta.
Type of Report and Period Covered Note
Final;
Funding Information
FC26-08NT0005287
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