Measurement and correlation of data used for CO₂ absorption in different amine solutions at various temperatures
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- Master i teknologi 
In order to design CO₂ absorption-desorption columns, models of experimental data would be needed to calculate many properties of the chemical system. In this research work, the experimental density values of aqueous solution containing monoethanolamine (MEA) and 3-dimethylamino-1-propanol (3DMA1P) as well as its constituent, MEA + 3DMA1P binary mixtures have been reported with their uncertainties in the temperature range, (298.15 to 353.15) K and atmospheric pressure, for 0.3 and 0.5 total amine mass fractions for the aqueous ternary system and whole composition range for the binary mixtures. Excess molar volumes based on the density values were determined and correlated against mole fractions using Redlich-Kister model of the fourth order for the MEA + 3DMA1P binary mixtures and Nagata-Tamura model for the MEA + 3DMA1P + H₂O ternary solutions. The measured data and correlated data were compared and analyzed. It is also reported in this work, the densities of aqueous solutions containing both N-methyldiethanolamine (MDEA) and piperazine (PZ) in a temperature range of (293.15 to 363.15) K. The mass fraction of PZ was varied in the range of 0 to 0.1 whilst keeping the mass fraction of MDEA constant at 0.3, 0.4 and 0.5. A non-dimensional single polynomial model was employed to correlate all the density values as a function of total amine mass fractions and temperature. The density values based on the model had a root mean square deviation of 0.0093kg/m3 from the experimental values, which indicates an excellent agreement between the two values, considering a value of 0.414kg/m3 for the combined experimental uncertainty, at 95% level of confidence.