ABSTRACT

The solubility of CO2 in two inexpensive ionic liquids, tributylmethylammonium methylsulfate [TBMN][MeSO4] and tributylmethylphosphonium methylsulfate [TBMP][MeSO4], has been studied experimentally. A synthetic method was used to measure bubble-point pressures up to 13 MPa for a temperature range of (313 to 368) K. The solubility of CO2 in [TBMP][MeSO4] was slightly higher than in [TBMN][MeSO4], but CO2 solubilities in both the ionic liquids were surprisingly higher than in the imidazolium analogue 1-butyl-3-methylimidazolium methylsulfate [bmim][MeSO4]. The relatively high melting points of the used ionic liquids may limit their application in CO2 capture processes.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C14H33O4PS	tributylmethylphosphonium methyl sulfate
3	C14H33NO4S	N,N-dibutyl-N-methyl-1-butanaminium methyl sulfate

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Phase	Method	#Points
POMD	2	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	VISOBS	1
POMD	3	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	VISOBS	1
POMD	1 2	Vapor or sublimation pressure, kPa ; Gas	Mole fraction - 1; Liquid Temperature, K; Liquid	Gas Liquid	Closed cell (Static) method	29
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid Gas	Closed cell (Static) method	28

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Solubility of CO2 in the Ionic Liquids [TBMN][MeSO4] and [TBMP][MeSO4]

Ramdin, M.[Mahinder], Vlugt, T. J. H.[Thijs J. H.], de Loos, T. W.[Theo W.]

ABSTRACT