Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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



Byung-chul Lee, Stephanie L. Outcalt


Solubility data of carbon dioxide, propane, propylene, n-butane, and 1-butene in the ionic liquid 1-n-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 using an apparatus equipped with a cylindrical equilibrium view cell. 1-Butene had the highest solubility, followed by n-butane, propylene, and then propane. Carbon dioxide and propane are similarly the least soluble in the [bmim][Tf2N]. Alkene gases were more soluble than alkane gases. The Henry's constants of each gas in the ionic liquid were estimated as a function of temperature from the experimental solubility data.
Journal of Chemical and Engineering Data


1-butene, 1-n-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, carbon dioxide, Henry's constant, ionic liquid, propane, propylene, solubility, n-butane


Lee, B. and Outcalt, S. (2006), Solubilities of Gases in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(Trifluoromethylsulfonyl)imide, Journal of Chemical and Engineering Data, [online], (Accessed June 17, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 5, 2006, Updated October 12, 2021