Physicochemical and thermodynamic properties of aqueous blends of 3-aminopropyl triethoxysilane and amines at 298.15–333.15 K

Abstract We report the density, viscosity, sound velocity, and refractive index experimental data of four silane–amine blended systems viz. (1) 3-aminopropyl triethoxysilane (TESA) + N-(2-aminoethyl) piperazine (AEP), (2) 3-aminopropyl triethoxysilane (TESA) + 2-methyl-1-propanol (AMP) (3) 3-aminopropyl triethoxysilane (TESA) + Methyldiethanolamine (MDEA) and (4) 3-aminopropyl triethoxysilane (TESA) + Diethanolamine (DEA). The temperature range for all the measurements is (298.15–333.15) K up to a mole fraction of 0.2 of TESA in the solution. The physicochemical properties were well fitted against the first principle and artificial neural network models. We further calculated key properties for CO2 capture such as diffusivity in CO2, isentropic compressibility, thermal expansion coefficients, Gibb's free energy, entropy, and enthalpy of activation. The data collected from this work could contribute to further detailed kinetic analysis of CO2 absorption over these capturing solvents.