ABSTRACT

Among new potential solvents for lignocellulosic materials, ionic liquids (ILs) are attracting considerable attention. Hence, the knowledge of the thermophysical properties of such fluids is essential for the design of related industrial processes. Therefore, in this work, a set of thermophysical properties, namely, density, viscosity, and refractive index, as a function of temperature, and isobaric thermal expansivity and heat capacities at a constant temperature, were determined for eight ionic liquids with the 1-ethyl-3-methylimidazolium cation combined with the following anions: acetate, methylphosphonate, methanesulfonate, trifluoromethanesulfonate, dicyanamide, thiocyanate, tosylate, and dimethylphosphate. Imidazolium-based ILs were chosen since these are the most studied ionic fluids in biomass dissolution approaches, while a large array of anions was investigated because it was already demonstrated that it is the IL anion that mainly governs the dissolution.

Compounds

#	Formula	Name
1	C8H14N2O2	1-ethyl-3-methylimidazolium acetate
2	C7H15N2O3P	1-ethyl-3-methylimidazolium methyl phosphonate
3	C7H14N2O3S	1-ethyl-3-methylimidazolium methanesulfonate
4	C7H11F3N2O3S	1-ethyl-3-methylimidazolium trifluoromethanesulfonate
5	C8H11N5	1-ethyl-3-methylimidazolium dicyanamide
6	C7H11N3S	1-ethyl-3-methylimidazolium thiocyanate
7	C13H18N2O3S	1-ethyl-3-methylimidazolium 4-methylbenzenesulfonate
8	C8H17N2O4P	1-ethyl-3-methylimidazolium dimethylphosphate

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	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	7
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	5	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	6	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	18
POMD	6	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	6
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	18
POMD	7	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	13
POMD	7	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	10
POMD	7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Drop calorimetry	1
POMD	8	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	CONCYL:UFactor:2	13
POMD	8	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	7
POMD	8	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	13

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

Thermophysical Characterization of Ionic Liquids Able To Dissolve Biomass

Freire, M. G.[Mara G.], Teles, A. R. R., Rocha, M. A. A.[Marisa A.A.], Schroder, B.[Bernd], Neves, C. M. S. S.[Catarina M. S. S.], Carvalho, P. J.[Pedro J.], Evtuguin, D. V.[Dmitry V.], Santos, L. M. N. B. F.[Luis M. N. B. F.], Coutinho, J. A. P.[Joao A. P.]

ABSTRACT