A high-pressure view-cell technique based on the synthetic method was used to determine the solubility of carbon dioxide in the ionic liquid 1-n-butyl-3-methylimidazolium methyl sulfate ([bmim][CH3SO4]). The temperature ranged from 293.2 K to 413.1 K, the pressure and the carbon dioxide molality reached up to 10 MPa and 3.3 mol of CO2a(kg of [bmim][CH3SO4])-1, respectively. The (extended) Henry s law was successfully applied to correlate the solubility pressures. The final results for the Henry s constant (at zero pressure) of carbon dioxide in [bmim][CH3SO4] (on the molality scale) are correlated within the estimated uncertainty (( 1.3 %) by ln(kH,CO2 (0) /MPa) ) 7.2738 - 1775/(T/K) - 0.002033(T/K). Furthermore, some small corrections were applied to the experimental results for the solubility of carbon dioxide in the ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) reported in previous work. The corrected values for the Henry s constant of carbon dioxide in [bmim][PF6] only slightly and systematically deviate (by about -2 % at given temperature) from the values reported previously.
Compounds
#
Formula
Name
1
C9H18N2O4S
1-butyl-3-methylimidazolium methyl sulfate
2
CO2
carbon dioxide
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
Constraint
Phase
Method
#Points
POMD
1
Mass density, kg/m3 ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
VIBTUB:UFactor:16
9
POMD
2
1
Molality, mol/kg ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Gas
volumetrically or by knowing small ammounts of mass