Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

This work analyzes different physical properties with importance upon mass transfer processes (density, speed of sound, viscosity, and surface tension) for new chemical solvents for carbon dioxide capture (dimethylethylenediamine + water and ethanolamine + dimethylethanolamine + water). These solvents are composed of two different amino groups: a primary and a tertiary. In one solvent, it is achieved by the use of a diamine and for the other a mixture of two solutes is employed. Also excess properties have been studied in order to explain the behavior of previously commented properties on the basis of interactions between molecules. An increase in the amount of amine or amines in the mixtures generally causes a decrease in the analyzed properties but in speed of sound and viscosity a previous increase was observed. An increase in temperature also causes a decrease in all the physical properties. Also the diamine-based solvent shows higher molecular interactions than the amine mixture. These data allow one to perform a comparison between the properties of these solvents that can be useful information to choose one of them. On the basis of these properties, this kind of solvent (diamine + water) is better to be used in carbon dioxide chemical absorption