ABSTRACT

In this work, isothermal gas-liquid equilibrium (GLE) data were measured for dilute SO2 in the binary system N,N-Dimethylformamide (DMF) (1) + Diethylene glycol (DEG) (2) at T = (298.15, 303.15, 313.15, and 318.15) K and p =122.66 kPa. Based on the GLE data, Henry's law constants were obtained by fitting the linear slope of GLE data, and the thermodynamic parameters were calculated. The thermodynamic results showed that the dissolving processes of dilute SO2 in the binary system are spontaneous, enthalpy driving, and reversible behavior. When conventional UV, FTIR, and 1H-NMR spectroscopic techniques were used for inspection of spectral changes of dilute SO2 in the binary system DMF (1) + DEG (2), the spectral results suggest that hydrogen bonding and interaction of carbonyl oxygen atoms in DMF with hydroxyl hydrogen atoms in DEG were formed as HC=O***HO-CH2CH2-O-CH2CH2-OH***, and the strong absorption capability of SO2 in the binary system can be due to the intermolecular S***O interaction as the formation -HC=O***(O)SO.

Compounds

#	Formula	Name
1	C4H10O3	diethylene glycol
2	O2S	sulfur dioxide
3	N2	nitrogen
4	C3H7NO	dimethylformamide

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.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1 2 3	Partial pressure, kPa - 2 ; Gas	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid	Pressure, kPa; Gas	Gas Liquid	gas chromatography	27
POMD	4 2 3	Partial pressure, kPa - 2 ; Gas	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid	Pressure, kPa; Gas	Gas Liquid	gas chromatography	18
POMD	4 1 2	Partial pressure, kPa - 2 ; Gas	Solvent: Mole fraction - 4; Gas Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid		Gas Liquid	gas chromatography	166
POMD	1 2	Partial pressure, kPa - 2 ; Gas	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid		Gas Liquid	gas chromatography	27
POMD	4 2	Partial pressure, kPa - 2 ; Gas	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid		Gas Liquid	gas chromatography	18

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

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

Lan, G.[Gongjia], Xu, Q.[Qiuxia], Sun, S.[Shaoyang], Xiao, J.[Jianbai], Gao, F.[Fei], Niu, Y.[Yanxian], Xie, X.[Xiaohong], Zhang, J.[Jianbin], Wei, X.[Xionghui]

ABSTRACT