Absorption Properties and Spectroscopic Studies of Dilute Sulfur Dioxide in Aqueous Glycerol Solutions

作者：He, Zhiqiang; Liu, Jinrong^*; Li, Lijun; Lan, Dawei; Zhang, Jianbin

来源：Industrial & Engineering Chemistry Research, 2012, 51(43): 13882-13890.

DOI：10.1021/ie3016158

• LIQUID-EQUILIBRIUM DATA
• ETHYLENE-GLYCOL
• POLY(ETHYLENE GLYCOL)
• MIXTURE GAS
• DENSITIES
• TEMPERATURES
• VISCOSITIES
• COMPLEX
• SYSTEM

Isothermal gas-liquid equilibrium (GLE) data were reported at 298.15 K and 123.15 kPa for the absorption of dilute SO2 in aqueous glycerol solutions, in which SO2 partial pressures are calculated in the range of (0 to 140) Pa. The GLE data were obtained with uncertainties within +/- 0.02 K for temperatures, 0.133 kPa for total pressures, +/- 3.5% for SO2 concentration in the gas phase, and +/- 5% for SO2 concentration in the liquid phase. The measurements showed that the solubility of dilute SO2 in the system of glycerol (1) + water (2) increases with the increasing glycerol concentrations in the whole composition, and the solubility of SO2 in the system of glycerol (1) + water (2) presents an extreme minimum of 60.1 mg.L-1 at the mass fraction of w(1) = 1.00 when SO2 in the gas phase is designed at y(SO2) = 5 X 10(-4). In addition, UV, FTIR (Fourier transform infrared), H-1 NMR, and fluorescence spectra in the absorption processes of SO2 in the system of glycerol (1) + water (2) were investigated to present important absorption mechanism. Based on the spectral results obtained, the possibility of intermolecular hydrogen bond formation by hydroxyl oxygen atoms in the glycerol molecule with hydrogen atom in the H2O molecule and S center dot center dot center dot O interaction formation by hydroxyl oxygen atom in the glycerol molecule with sulfur atom in the SO2 molecule are discussed.

• 出版日期2012-10-31
• 单位内蒙古工业大学