ABSTRACT

Suitability of a pyridinium ionic liquid as a solvent in desulfurization has been analyzed. (Liquid + liquid) equilibria for ternary systems composed by 1-hexyl-3,5-dimethyl pyridinium {bis[trifluoromethylsulfonyl] imide, thiophene, and three hydrocarbons representative of fuel (n-heptane, 2,2,4 trimethylpentane, and toluene) have been determined at T = 298.15 K and atmospheric pressure. High solubility of thiophene in the ionic liquid and also of toluene have been found, being this solvent practically immiscible with 2,2,4 trimethylpentane and heptane. Equilibrium data of these systems have been well correlated with UNIQUAC equations finding the highest deviations for the ternary system involving toluene. NRTL model drove to worse results being considered as not suitable model to correlate the experimental results.

Compounds

#	Formula	Name
1	C7H8	toluene
2	C8H18	2,2,4-trimethylpentane
3	C4H4S	thiophene
4	C7H16	heptane
5	C15H22F6N2O4S2	1-hexyl-3,5-dimethylpyridinium bis(trifluoromethylsulfonyl)imide

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	5	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	3 4 5	Mole fraction - 4 ; Liquid mixture 1 Mole fraction - 4 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 2	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	11
POMD	3 2 5	Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 2	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	9
POMD	1 3 5	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 1	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	11

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Evaluation of the polysubstituted pyridinium ionic liquid [hmmpy][Ntf2] as a suitable solvent for desulfurization: Phase equilibria

Arce, A.[Alberto], Francisco, M.[Maria], Soto, A.[Ana]

ABSTRACT