Surface Tension and Foaming Study of Solution of N-Methyldiethanolamine and Amine Functionalized UiO-66 Nanofluid

In this study investigate the foaming behavior and surface tension of aqueous N-Methyldiethanolamine (MDEA) in the presence of amine functionalized UiO-66 (UiO-66-NH2) was studied. Foam volume and foam stability of solution containing of MDEA and MDEA + UiO-66-NH2 nanofluid was measured and effect of added UiO-66-NH2 to the MDEA solution on foam volume and foam stability was studied. Experiments were carried out at 313.15, 323.15 and 333.15 K and atmospheric pressures. Results show that addition of 0.1 % wt. of UiO-66-NH2 to the solution of 40% wt. of MDEA, decreases up to 25% in foam volume and up to 47 % in foam stability. Besides, effect of addition UiO-66-NH2 to the MDEA solution on surface tension was studied by LAUDA interfacial tensiometer model TD3, which uses the Du Noüy ring method and results of this study showed that addition of 0.1 % wt. of UiO-66-NH2 to the solution of 40% wt. of MDEA increases 0.8 % in surface tension of solution. A suitable model was used to investigate foam property and highlights that solutions behave linearly in decreasing foam formation and surface tension with an increasing of temperature. Foaming model was successfully developed and was fitted to experimental data and and maximum error were 0.9957 and 12%, respectively