CO₂ Capture in Ionic Liquids: A Review of Solubilities and Experimental Methods

Table 3

Influence of anions in different ionic liquids.

Anion	Nomenclature	Classification	Solubility of CO2 in IL
Dicyanamide	[DCA]^−	Nonfluorinated anions	Low
Nitrate	[NO3]^−
Tetrafluoroborate	[BF4]^−	Fluorinated anions	Relatively high
Hexafluorophosphate	[PF6]^−
Trifuoromethanesulfonate	[TfO]^−
Bis(trifluoromethylsulfonyl) imide	[Tf2N]^−
Tris(trifluoromethylsulfonyl) methide	[methide]^−