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Solubilities of Gases in the Ionic Liquid 1-n-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide

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Physical and Chemical Properties Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305-3328
Cite this: J. Chem. Eng. Data 2006, 51, 3, 892–897
Publication Date (Web):April 6, 2006
Copyright © Not subject to U.S. Copyright. Published 2006 American Chemical Society

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    Solubility data of carbon dioxide, propane, propene, butane, and 1-butene in the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf2N]) are presented as a function of pressure at temperatures between 280 K and 340 K. The equilibrium pressure at a given temperature and the amount of gas dissolved into the ionic liquid phase were measured with an experimental technique based on a saturation method at constant volume by use of an apparatus equipped with a cylindrical equilibrium view cell. All measured solubilities were between 0.1 and 0.5 mole fraction gas in ionic liquid. 1-Butene had the highest solubility, followed by butane, propene, and then propane. Carbon dioxide and propane are similarly the least soluble in the [bmim][Tf2N]. Alkene gases were more soluble than alkane gases. From the experimental solubility data, the Henry's constants of each gas in the ionic liquid were estimated as a function of temperature.

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     Present address:  Dept of Chemical Engineering, Hannam University, 133 Ojung-dong, Daedeok-gu, Daejeon 306-791, Korea.


     Corresponding author. Tel:  (303)497-5786. E-mail:  stephanie.outcalt@

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    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    Your Mendeley pairing has expired. Please reconnect