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Solubilitiesof SO2in binary mixtures of urea and ethyleneglycol were determined by gas–liquid equilibrium experimentsat the temperatures from (298.15 to 318.15 K) and 122.7 kPa, withSO2partial pressure in gas phase in the range of (0 to130) Pa. Henry’s law constants were calculated based on thesolubility data. It indicated that the mixture with urea molalityof 6.65 mol·kg–1has the most desirable capacity.More than 90 % SO2can be regenerated by bubbling N2at 338.15 K. Density and viscosity data for the binary mixtureswere also measured. In addition, UV, IR, and NMR experiments wereconducted to investigate the interaction between ethylene glycol,urea, and SO2. The result demonstrated that SO2can interact with the mixture by both the charge-transfer interactionbetween S (SO2)···N (urea) and the hydrogenbond between O (SO2)···H (ethylene glycol). [ABSTRACT FROM AUTHOR]

In this work, the isothermal gas–liquid equilibrium (GLE) data were measured for the system of polyethylene glycol 400 (PEG 400) + N,N-dimethylformamide (DMF) + SO2 + N2 at 308.15 K and 123 kPa with SO2 partial pressures in the range of (16.8 to 115) Pa. The Henry's law constant (H′) and standard Gibbs free energy change (ΔG) were calculated from these GLE data. Furthermore, the densities and viscosities of binary mixtures of DMF + PEG 400 were also measured over the whole concentration range at T = (298.15 to 313.15) K. From the experimental data, including density and viscosity values, the excess molar volumes (VmE), and viscosity deviations (Δη), the calculated results are fitted to a Redlich–Kister equation to obtain the coefficients and estimate the standard deviations between the experimental and the calculated quantities. [ABSTRACT FROM AUTHOR]