ABSTRACT

This work reports experimental data and mathematical modeling of the boiling-point elevation (BPE) of aqueous solutions of ionic liquids (IL) derived from diethanolamine (DEOA) of cationic base and acetic, propionic, butanoic and pentanoic acids. Experimental boiling points were obtained for solutions of the four ILs in different water mole fractions (0.32 to 1.00) and pressures (12.1 to 91.8) kPa. Since ILs are compounds with very low vapor pressure, BPE calculations were performed employing the isofugacity conditions of water in liquid and vapor phase, in which the NRTL model was used to take into account the non-ideality of these liquid mixtures. The proposed model presented a satisfactory agreement with the experimental data, with a Mean Absolute Error of T = 1.43 K between calculated and all experimental values.

Compounds

#	Formula	Name
1	C6H15NO4	2,2'-azanediylbis(ethanol) acetate
2	C7H17NO4	bis(2-hydroxyethyl)ammonium propanoate
3	C8H19NO4	diethanolamine butyrate
4	C9H21NO4	diethanolamine pentanoate
5	H2O	water

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	5	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	6
POMD	5 1	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 5; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	42
POMD	5 2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 5; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	42
POMD	5 3	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 5; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	42
POMD	5 4	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 5; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	42

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Boiling point elevation of aqueous solutions of ionic liquids derived from diethanolamine base and carboxylic acids

Hoerning, A.[Alessandra], Ribeiro, F. R. G.[Fabia R. G.], Filho, L. C.[Lucio Cardozo], Liao, L. M.[Luciano M.], Corazza, M. L.[Marcos L.], Voll, F. A. P.[Fernando A. P.]

ABSTRACT