Evaluation of Physicochemical Characteristics of Aqueous Bis(3-Aminopropyl)Amine and its Mixture with 2-Amino-2-Methyl-1-Propanol across Varied Temperatures and Concentrations toward Exploring New Solvents for CO₂ Capture

The efficacy of amine solvents is pivotal for the absorption–desorption of CO2 in postcombustion carbon capture. This study delves into the exploration of novel amine solvents, aiming to enhance the CO2 capture efficiency. The physicochemical properties, including density, viscosity, and surface tension, are fundamental in evaluating the suitability of amine solvents for CO2 capture. The present investigation is focused on measuring the physicochemical properties of aqueous bis(3-aminopropyl)amine (APA) and its mixture with the 2-amino-2-methyl-1-propanol (AMP) solvent system across a temperature range of 303–348 K. Correlation coefficients based on temperature and weight percentage are derived for each physicochemical property through rigorous regression analysis. The results exhibit excellent agreement between the measured and calculated data, with average absolute deviations of 0.051% for density, 3.115% for viscosity, and 0.491% for surface tension. This comprehensive exploration contributes valuable insights for the development of a promising solvent system for CO2 capture.