Solubility and Spectral Studies for SO2 in a Binary System of Triethylene Glycol plus Dimethyl Sulfoxide at T = (298.15, 303.15, and 308.15) K and p=123.15 kPa

摘要

In this work, isothermal gas-liquid equilibrium (GLE) data were measured for the mixture SO2 + N-2 in the system of triethylene glycol (TEG) + dimethyl sulfoxide (DMSO) at T = (298.15, 303.15, and 308.15) K and p = 123.15 kPa. Henry's law constants (HLCs) were obtained by fitting the linear slope of the GLE data. The results indicated that the solubility of dilute SO2 in the system of TEG + DMSO increased with the increasing DMSO concentrations, and HLCs decreased with the increasing temperatures. The regeneration experimental results showed that the absorption of SO2 in the binary system was reversible, and the solvent could be reused without significant loss of absorption capacity. Additionally, FTIR, UV-vis, and H-1 NMR spectral results indicated that intermolecular hydrogen bonding association among TEG, DMSO, and SO2 molecules was formed.