ABSTRACT

An express method for the determination of vaporization enthalpies of extremely low volatile molecular and ionic liquids has been developed using a commercially available TGA. All experimental parameters (mass loss rate, temperature range, and purge gas flow) crucial for reliable measurements were carefully studied using the reference molecular compounds (n-hexadecane, di-butyl phthalate, methyl and ethyl stearate) with the reliable data. Optimal experimental conditions were recommended. Molar vaporization enthalpies of the low volatile reference molecular compounds were reproduced under optimal conditions better than 2 kJ*mol-1. Test measurements with the extremely low volatile ionic liquid [C2mim][NTf2] have revealed an agreement with the reliable data already available in the literature within +-3 kJ*mol-1. The experimental conditions recommended in this work allow a quick appraisal of vaporization enthalpies of very low volatile materials within 8 h at a reasonable level of accuracy.

Compounds

#	Formula	Name
1	C16H34	hexadecane
2	C16H22O4	dibutyl phthalate
3	C19H38O2	methyl octadecanoate
4	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
5	C20H40O2	ethyl octadecanoate

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	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	DTG	1
POMD	1	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration	1
POMD	2	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	DTG	1
POMD	3	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	DTG	1
POMD	4	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	DTG	1
POMD	5	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	DTG	1
POMD	5	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration	1

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Express thermo-gravimetric method for the vaporization enthalpies appraisal for very low volatile molecular and ionic compounds.

Verevkin, S. P.[Sergey P.], Ralys, R. V.[Ricardas V.], Zaitsau, D. H.[Dzmitry H.], Emel'yanenko, V. N.[Vladimir N.], Schick, C.[Christoph]

ABSTRACT