Density and Viscosity Correlations of Solution Systems of MEA-Water, MDEA-Water and MEA-MDEA-Water for CO2 Removal Process

Kreangkrai Maneeintr


Density, Viscosity, Carbon dioxide capture, Flue gas


Aqueous alkanolamine solutions such as monoethanolamine (MEA) and N-methyldiethanolamine (MDEA) are commercially used to remove acid gas such as carbon dioxide (CO2) causing climate change and global warming from power plant flue gas stream. Therefore, to obtain the efficient design and operation of a gas treating process plant, this process requires data of physical and transport properties like density and viscosity of these solutions. The densities and viscosities of binary solutions of monoethanolamine (MEA) + water, methyldiethanolamine (MDEA) + water and ternary solution of MEA + MDEA + water are correlated over the entire concentration ranging from 0 to 1 mole fraction and temperature ranging from 25-80°C for binary system and for ternary system, total concentration of 30% mass and temperature ranges from 30-80°C. Various correlation models such as Redlich-Kister equation, Wilson model, equation of Grunberg and Nissan and an empirical polynomial correlation are used for correlation with the measured data. Among them, the Redlich–Kister equation shows the most suitable model that correlated best with experimental data.

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