Solubility for dilute sulfur dioxide, viscosities, excess properties, and viscous flow thermodynamics of binary system N,N-dimethylformamide+diethylene glycol

Solubility properties and spectral characterization of sulfur dioxide in ethylene glycol derivatives

“…Considering that the absorptions of SO 2 in ethylene glycol derivatives are typical physical processes as mentioned above, Henry's law constant (H 0 ), Gibbs free energy (DG), enthalpy changes (DH) and entropy changes (DS) were calculated based on the GLE data with the data treatment method in literature 30 (see Table S2 in ESI †). All thermodynamic parameters are listed in Table 1.…”

Thermodynamic properties and spectral investigation of dilute sulfur dioxide in binary system N,N-dimethylformamide+diethylene glycol

“…The experimental apparatus is shown in the previous work [13]. Experiments were respectively carried out at [ 4 1 _ T D $ D I F F ] T = (298.…”

“…However, the high expense and viscosity of ionic liquids limited their uses in industry application. In our previous work [11][12][13], Wei and his co-workers found that the binary systems [ 4 0 _ T D $ D I F F ] N, N-dimethylformamide (DMF) + ethylene glycol derivatives show strong solubility to SO 2 and SO 2 could be mostly desorbed from these mixtures; and then, the absorbent solution is used again.…”

“…However, our previous work [13] only reported the gasliquid equilibrium (GLE) data for SO 2 in the binary system DMF (1) + DEG (2) at 308.15 K and 122.66 kPa.…”

“…In the reference[13] the minimum values of excess molar volume for DMF (1) + DEG (2) is at x 1 = 0.64 (DMF molar fraction). Then, this section using DMF (1) + DEG (2) (x 1 = 0.64) + SO 2 as the promising desulfurization solvent to investigate the way to interaction with SO 2 .The recorded UV spectral changes of DMF (1) + DEG(2)+[ 6 1 _ T D $ D I F F ] SO 2 are shown in Fig.…”