ABSTRACT

The isobaric thermal expansivity ap in the temperature and pressure intervals of (278.15 to 348.15) K and (5 to 50) MPa is reported for an assorted set of room temperature ionic liquids (RTILs) using a calorimetric method with an uncertainty of 2 %. The RTILs were selected to represent some of the most widely studied anions and cations; 1-butyl-3-methylpyridinium tetrafluoroborate [C4mpyr][BF4], 1-ethyl-3-methylimidazolium tetrafluoroborate [C2mim][BF4], 1-hexyl-3-methylimidazolium tetrafluoroborate [C6mim][BF4], 1-octyl-3-methylimidazolium tetrafluoroborate [C8mim][BF4], 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C2mim][NTf2], and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C6mim][NTf2] are analyzed. The same general trends were obtained for the studied liquids, although differences are found both in the magnitude and in the ap behavior against temperature and pressure.

Compounds

#	Formula	Name
1	C10H16BF4N	1-butyl-3-methylpyridinium tetrafluoroborate
2	C6H11BF4N2	1-ethyl-3-methylimidazolium tetrafluoroborate
3	C10H19BF4N2	1-hexyl-3-methylimidazolium tetrafluoroborate
4	C12H23BF4N2	1-methyl-3-octylimidazolium tetrafluoroborate
5	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
6	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]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	Phase	Method	#Points
POMD	1	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80
POMD	2	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80
POMD	3	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80
POMD	4	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80
POMD	5	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80
POMD	6	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Microcalorimeter	80

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

Dependence against Temperature and Pressure of the Isobaric Thermal Expansivity of Room Temperature Ionic Liquids

Navia, P.[Paloma], Troncoso, J.[Jacobo], Romani, L.[Luis]

ABSTRACT