ABSTRACT

To explore environmentally benign solvents for absorbing SO2, a series of hydroxyl ammonium ionic liquids (ILs) was synthesized and characterized, and the solubilities of SO2 in these synthesized ILs were determined. It was found that the solubilities of SO2 in these ILs at ambient pressure are quite high, for example, the solubility of SO2 in tri-(2-hydroxyethyl)ammonium lactate is 0.4957 mole fraction and decreases sharply as temperature increase. The absorption and desorption are practically reversible in the synthesized ILs. Comparing with the conventional absorbents such as calcium carbonate (CaCO3), calcium oxide (CaO), and sodium hydroxide (NaOH), the synthesized ILs show two advantages: one is that the ILs can be recycled and repeatedly used, another is that the absorbed SO2 can be reversibly released and recovered as a sulfur resource.

Compounds

#	Formula	Name
1	C3H9NO3	2-hydroxyethylammonium formate
2	C4H11NO3	2-hydroxyethylammonium acetate
3	C5H13NO4	2-hydroxyethylammonium lactate
4	C7H17NO5	triethanolamine formate
5	C8H19NO5	triethanolammonium acetate
6	C9H21NO6	triethanolamine lactate
7	C5H13NO4	2-(2-hydroxyethoxy)ammonium formate
8	C6H15NO4	2-(2-aminoethoxy)ethanol acetate
9	C7H17NO5	2-(2-hydroxyethoxy)ammonium lactate

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	Phase	Method	#Points
POMD	1	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	2	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	2	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	3	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	4	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	5	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	5	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	5	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	6	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	6	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	6	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	7	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	7	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	7	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	8	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	8	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	8	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	8	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	8	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1
POMD	9	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	9	Triple point temperature, K ; Glass		Glass Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	9	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	1
POMD	9	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	9	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	rotary viscometer	1

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Hydroxyl Ammonium Ionic Liquids: Synthesis, Properties, and Solubility of SO2

Yuan, X. L.[Xiao Liang], Zhang, S. J.[Suo Jiang], Lu, X. M.[Xing Mei]

ABSTRACT