ABSTRACT

Simultaneous measurements of density and sound speed, at five temperatures, T = (283.15 to 303.15) K and over the whole composition range were performed in 38 aqueous mixtures of 2-(isopropylamino) ethanol (IPAE), a sterically hindered amine of new generation with potential use in CO2 capture. Composition and temperature effects on different molar, excess molar, apparent molar and partial molar properties such as volume, isobaric expansion and isentropic compression are analysed, in order to assess different changes in the hydration and association patterns, across the entire composition range. A quantitative measure of the screening effect produced by the bulky hydrophobic part of IPAE to the H-bonding ability of the NH group to the water molecules, is proposed. A comparison of the different thermodynamic properties, derived for this system, with those for the aqueous system of 2-(ethylamino)ethanol (EEA), is made. This last compound has a common structural NHCH2CH2OH group sequence and a smaller and linear hydrophobic part.

Compounds

#	Formula	Name
1	C5H13NO	2-isopropylaminoethanol
2	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	Constraint	Phase	Method	#Points
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	5
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	5
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	150
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	145

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic study of aqueous 2-(isopropylamino)ethanol. A sterically hindered new amine absorbent for CO2 capture

Lampreia, I. M. S.[Isabel M.S.], Santos, A. F. S.[Angela F.S.], Moita, M.-L. C.[Maria-Luisa C.J.], Nobre, L. C. S.[Luis C.S.]

ABSTRACT