Abstract
The densities of aqueous mixtures of aminoethylethanolamine (CAS #000111-41-1) were measured over the entire compositional range at temperatures of 283.15–343.15 K. The results of these measurements were used to calculate excess molar volumes and isobaric thermal expansion coefficients, and partial molar and apparent molar volumes and excess isobaric thermal expansion coefficients were subsequently derived. The excess molar volumes were correlated as a function of the mole fraction using the Redlich–Kister equation. Temperature dependences of the Redlich–Kister coefficients are also presented. The partial molar volumes at infinite dilution of AEEA in water were determined using two different methods. In addition, the solution density was correlated using a Joubian–Acree model. Aqueous solutions of AEEA exhibit similar properties to the aqueous solutions of other alkanolamines (like monoethanolamine) used in acid gas sweetening.
Highlights
Aminoethylethanolamine (2-[(2-aminoethyl)amino]-ethanol), C4H12N2O) is used to make a derivative used as a wet-adhesion additive for latex paints, as a fabric softener added to textile materials, and as a dispersant detergent additive for fuel
Using monoethanolamine (MEA), diethanolamine (DEA) or methyldiethanolamine (MDEA), which are common in the petrochemical and natural gas industries, would reduce power plant output by 25–35 % due to the high energy requirements of the technology [1]
The molar volumes can be calculated from the density data and Eq 1 takes the form: Table 2 Compositions, densities, excess molar volumes, and thermal expansion coefficients for AEEA (2) ? water (1) mixtures at different temperatures x2
Summary
J Solution Chem (2014) 43:959–971 chemical, and natural gas industries and for post-combustion carbon capture from fluegases. Literature related to the physical properties of AEEA and its aqueous solutions is scarce: Mundhwa et al [7] reported densities, viscosities and refractive indices of aqueous solutions of AEEA, while Ikada et al [8] presented densities and refractive indices of the pure amine. This study extends the small database of the physical properties of AEEA aqueous solutions by presenting densities and derived volumetric properties over the entire composition range. The density of the solutions was correlated using the Jouyban–Acree model [9], which is especially useful during practical, engineering design. This simple model allows calculation of the density of binary aqueous AEEA mixtures at different temperatures and in any composition. The densities of pure AEEA and water, and only other three parameters, are required to estimate density, with average error of around 0.1 %
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