Phase Equilibria of the 1-Hexyl-2,3-dimethylimidazolium Bis(trifluoromethylsulfonyl)imide and Carbon Dioxide Binary System and 1-Octyl-2,3-dimethylimidazolium Bis(trifluoromethylsulfonyl)imide and Carbon Dioxide Binary System

다국어 초록 (Multilingual Abstract)

<P>A high-pressure variable-volume view cell was used to measure the phase equilibria of a 1-hexyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ([HMMIM][Tf<SUB>2</SUB>N]) and CO<SUB>2</SUB> binary system in the temperature range of (298.2 to 323.2) K at intervals of 5.0 K. In addition, the vapor–liquid equilibrium of a 1-octyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ([OMMIM][Tf<SUB>2</SUB>N]) and CO<SUB>2</SUB> binary system was determined in the temperature range (288.2 to 323.2) K at 5.0 K intervals. The Peng–Robinson equation of state with the van der Waals two-parameter mixing rule was used to correlate the vapor–liquid equilibria of CO<SUB>2</SUB> and ionic liquids. The effect of the alkyl chain length in the cation on the phase behavior of a trisubstituted-imidazolium-cation-based ionic liquid and CO<SUB>2</SUB> binary system was investigated.</P><P><B>Graphic Abstract</B>
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