In this work, the solubility of CO2 in aqueous blended systems of N-methyldiethanolamine (MDEA) and guanidinium trifluoromethanesulfonate ([gua]+[OTf]-) have been carried out. The solubilities were measured at temperature 303.2 K, 323.2 K and 333.2 K, over CO2 partial pressure ranging from 500 to 3000 kPa. All data were reported as loading capacity (mol CO2 / total mol) as a function of partial pressure of CO2 at the corresponding temperature. It has been found that the aqueous [gua]+[OTf]- ionic liquid gave significantly higher solubility, up to 1.63 mol CO2/ total mol, as compared to other pure ionic liquids such as [bmim]+[BF4]-, [emim]+[OTf]- and [emim]+[C2N3]- which recorded at 323.2 K and 3000 kPa. However, the addition of [gua]+[OTf]- ionic liquid to aqueous MDEA gave a slight decreased on solubility. Correlations of solubility as a function of partial pressure and temperature were obtained with deviation of +- 0.957 %.
Compounds
#
Formula
Name
1
C5H13NO2
N-methyldiethanolamine
2
CO2
carbon dioxide
3
H2O
water
4
C2H6F3N3O3S
guanidinium trifluoromethanesulfonate
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.