Elucidating the important thermo physical characterization properties of amine activated hybrid novel solvents for designing post-combustion CO₂ capture unit

The surge in energy demand globally has resulted in high level of CO2 emissions through large industrial point sources. Chemical or physical absorption is one of the widely used methods utilized for large scale CO2 & nbsp;capture. The utility of any solvent in CO2 & nbsp;absorption system requires the detail fundamental understanding of physicochemical properties associated with the solvent. In the present work, physicochemical properties of six different aqueous blends of hybrid solvents of (3-aminopropyl) triethoxysilane (TESA), N-methyldiethanolamine (MDEA), sulfolane (TMSO2), 1-butyl-3-methyl-imidazolium acetate ([bmim] [Ac]) activated by 1-(2-aminoethyl) piperazine (AEP), bis-(3-aminopropyl)amine (APA) and 2-methyl piperazine (2-MPZ) are studied. Various important physiochemical properties needed for process design viz. density, viscosity, surface tension, refractive index and sound velocity are measured over a broad range of temperature (298.15-333.15) K and concentration. Redlich-Kister and Grunberg-Nissan models have been used for correlating density and viscosity. Statistical regression have been applied for correlating sound velocity, refractive index and surface tension. Important derived properties of the proposed solvents have been also evaluated through empirical correlations. (C)& nbsp;2022 Elsevier B.V. All rights reserved.