The anthropogenic carbon dioxide (CO 2 ) denseness in the earth's atmosphere is increasing day-to-day by combusting fossil fuels for power generation. And, it is the most important greenhouse gas (GHG) responsible for 64% of global warming. Solvent-based carbon capture gained more attention towards researchers because of its easiness to integrate with the coal-fired power plant without significant modifications. During CO 2 absorption, the physical property of the solvent gets changed. A change in the solvent's physicochemical property affects further CO 2 absorption, thereby increasing the carbon-capture energy demand. The present experimental study encompasses CO 2 absorption studies using 30 wt% aqueous monoethanolamine (MEA), 2-amino-2methyl-1-propanol (AMP) and piperazine (PZ) followed by the detailed analysis of physicochemical properties (pH, carbon loading (α), viscosity (μ), density (ρ) and surface tension (σ)) of various CO 2 -loaded solutions. The results revealed that these properties are exhibiting interdependent eccentrics. Furthermore, an empirical model was developed to predict the carbon loading of the tested solvents. This model includes the tested physicochemical properties, reaction mixture temperature, diffusivity and change in the mass of solvent during carbon loading. In addition, an empirical model for viscosity as a function of temperature, carbon loading and molecular weight of solvents was developed. These models appear to predict the carbon loading and the viscosity well with greater accuracy.Keywords CO 2 capture . Carbon loading . Diffusivity . Viscosity . Surface tension . Empirical modelling Highlights • Detailed analysis on physicochemical characteristics of different carbon-loaded 30 wt% aqueous MEA/AMP/PZ solutions.• Non-dimensional model to predict the carbon loading of the 30 wt% aqueous MEA/AMP/PZ solution was developed.• In addition, a predictive model for viscosity as a function of solvent molecular weight, temperature and carbon loading of the 30 wt% aqueous MEA/AMP/PZ solution was formulated with greater accuracy.