Modeling of CO2 Solubility in Aqueous Solutions of Three Blended Amine Using Activity Coefficients

It is important issue that Reducing emissions of Carbon Dioxide (CO2) without decreasing fossil fuel usage. some kinds of alkanolamines has been used for CO2 absorption processes : primary, secondary, tertiary, steric hindrance amines and their binary mixtures. Among them, MEA (Monoethanolamine) is widely used as the solvent for carbon capture and sequestration (CCS). And AMP (2 – amino – 2 – methyl - propanol) is utilized as a stable amine for high CO2 absorption capacity. Also, MDEA (N-methyl-diethanolamine) is uesd as a sweetening agent in chemical, oil refinery, syngas production and natural gas. In this study, equilibrium solubility characteristics of CO2 in 3 Blended amines (MEA, AMP and MDEA) and their mixtures were evaluated by using experimental data and thermodynamic models. To consider the non-ideality, binary parameters of activity coefficients and equilibrium constants were regressed from experimental data. The DESHMUKGH – MATER models are used to estimate interactions between solute species in the liquid phase. Calculations of solubility and optimizations (parameter regression) were conducted by MATLAB® 2019a version. This frame work could be applied to processes of SOx, NOx.