Measurement and Correlations of Physicochemical Properties of the Novel Solvent Tris(2-aminoethyl) amine and Its Blend with N-Methyldiethanolamine and 2-Amino 2-Methyl-1-Propanol

Abstract

In this study, experiments have been accompanied to measure the viscosity and density of aqueous solutions of 2,2′,2″-triaminotriethylamine (TAEA) and their blends through N-methyldiethanolamine (MDEA) and 2-amino 2-methyl-1-propanol (AMP). Henry’s law constants (K H‑N2O) of N2O were analyzed experimentally by varying temperatures (293.15 to 323.15 K) and ambient pressure of 0.1 MPa. A modified Stokes–Einstein equation has been used to calculate the diffusivity of N2O in the solvents. The “N2O analogy” was utilized to calculate the (K H‑CO2) and CO2 diffusivity in aqueous solutions of 2,2′,2″-triaminotriethylamine and its blends. The experimental density, viscosity, and (K H‑N2O) data were correlated as a function of temperature and concentration. The calculated densities and viscosities from the prediction and the experimental data show a similar trend. The average absolute deviation, AAD (%), among the predicted and the observed density data for (TAEA + H2O), (MDEA + TAEA + H2O), and (AMP + TAEA + H2O) systems are about 0.030, 1.035, and 1.118, respectively. The AAD (%) amid the experimental and the correlated viscosity data for the same systems were correspondingly obtained as 9.602, 2.162, and 1.765.

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

“…On the other hand, aqueous K-CYS solution also exhibits lower viscosity compared to the conventional solvents MEA and MDEA reported in the literature. For instance, at T = 313.15 K and the same concentration of 30 wt.%, the viscosity of aqueous K-CYS is 1.685 mPa s, which is lower than MEA [66] and MDEA [68], the viscosities of 2.52 mPa s and 1.93 mPa s, respectively. The significant difference in the viscosity shown by the aqueous K-CYS solution implies that this solvent offers a lower mass transfer resistance compared to the conventional solvents.…”