To explore environmentally benign solvents for absorbing SO2, a series of caprolactam tetrabutyl ammonium bromide ionic liquids were synthesized, the solubilities of SO2 in which were measured at (298.2 to 403.2) K and atmospheric pressure. The solubilities of SO2 in these ionic liquids were 0.680 at 298.2 K and ambient pressure and decreased sharply as temperature increased and increased with the increasing mole ratio of caprolactam. A fifth-order polynomial was proposed and verified by experimental solubility data. The absorption and desorption of SO2 were practically reversible in the synthesized ionic liquids.
Compounds
#
Formula
Name
1
C6H11NO
1-aza-2-cycloheptanone
2
C16H36BrN
tetrabutylammonium bromide
3
O2S
sulfur 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
2
3
Amount ratio of solute to solvent - 3 ; Liquid
Solvent: Amount ratio of component to other component of binary solvent - 1; Liquid