In this work, the propylene glycol monomethyl ether (PGME) + dimethyl sulfoxide (DMSO) system was used in absorption process of SO2, and the gas-liquid equilibrium (GLE) data of SO2 in the binary system of PGME + DMSO were measured at T = (298.15, 303.15, and 308.15) K and p = 123.15 kPa. The experimental data are used to develop SO2 solubility model, which shows a potential application for SO2 removal. After that, Henry s law constants (HLCs) were further calculated by fitting the linear slope of solubility, and thermodynamic properties were calculated from the correlation of HLCs. The regeneration experimental results showed that 98.5 % SO2 can be desorbed at 333.15 K and N2 bubbling in 12 min, and no significant loss of absorption capacity for absorption solvents. Additionally, FTIR, UV-Vis, and 1H-NMR spectra were recorded to investigate the absorption mechanism of system for SO2 by comparing the spectral changes, and the results indicated that intermolecular hydrogen bonding association among PGME, DMSO, and SO2 molecules was formed.
Compounds
#
Formula
Name
1
C2H6OS
dimethyl sulfoxide
2
O2S
sulfur dioxide
3
C4H10O2
1-methoxy-2-propanol
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.