ABSTRACT

In this work, the desulfurization ability of the 1-hexyl-2,4-dimethylpyridinium bis(trifluoromethylsulfonyl) imide ionic liquid, [h2,4mmpy][NTf2], has been compared with that of 1-hexyl-3,5-dimethylpyridinium bis(trifluoromethylsulfonyl)imide, [h3,5mmpy][NTf2]. With this aim, liquid liquid equilibrium data have been obtained for the [h2,4mmpy][NTf2] + thiophene + toluene, [h2,4mmpy] [NTf2] + thiophene + hexane and [h2,4mmpy][NTf2] + pyridine + hexane ternary systems at 298.15 K and atmospheric pressure. The obtained data have been adequately correlated using the UNIQUAC and NRTL models. The suitability of both ionic liquids as solvents for extractive desulfurization has been evaluated in terms of solute distribution ratio and selectivity.

Compounds

#	Formula	Name
1	C15H22F6N2O4S2	1-hexyl-2,4-dimethylpyridinium bis((trifluoromethyl)sulfonyl)amide
2	C7H8	toluene
3	C5H5N	pyridine
4	C6H14	hexane
5	C4H4S	thiophene

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	5 4 1	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 5 ; Liquid mixture 1	Mole fraction - 5; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	12
POMD	2 5 1	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 5 ; Liquid mixture 1	Mole fraction - 5; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	14
POMD	4 3 1	Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 2	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	10
POMD	4 1	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	5 1	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Chromatography	1
POMD	2 1	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Chromatography	1

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Hexyl dimethylpyridinium ionic liquids for desulfurization of fuels. Effect of the position of the alkyl side chains

Rodriguez-Cabo, B.[Borja], Francisco, M.[Maria], Soto, A.[Ana], Arce, A.[Alberto]

ABSTRACT