Journal
FLUIDS
Volume 5, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/fluids5010027
Keywords
density; viscosity; MDEA; DMEA; DEEA; excess property; Redlich-Kister
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Funding
- Ministry of Education and Research of the Norwegian Government
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This study presents the measured densities and viscosities of three ternary aqueous mixtures of tertiary and primary amines. The tertiary amines of n-methyldiethanolamine (MDEA), dimethylethanolamine (DMEA), diethylethanolamine (DEEA), and the primary amine monoethanolamine (MEA) at different concentrations (mass%) were mixed to prepare the liquid mixtures. The excess molar volume VE of the mixtures was analyzed using measured densities to acquire a better understanding of the molecular packing and intermolecular interactions in the mixtures. The excess free energy of activation Delta GE* and excess entropy of activation Delta SE* for viscous flow were determined from the measured viscosities by implementing the theory of rate processes of Eyring. Correlations based on the Redlich-Kister type polynomial were adopted to correlate the excess properties VE and Delta GE* as a function of the amine mole fraction and temperature. The results showed that the correlations were able to represent the measured data with satisfactory accuracies for engineering calculations.
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