Experimental and COSMO-RS analysis of CO2 solubility in novel aqueous blends of 1-butyl-3-methyl-imidazolium tetrafluoroborate activated by 2-aminoethyl piperazine and bis(3-aminopropyl) amine for post combustion carbon capture

Analysis of available technologies and exploration of new ones are an integral approach for studying the efficient separation of carbon dioxide (CO2) from large point sources. Anew proposed aqueous solvent blends of 1-butyl-3methyl-imidazolium tetrafluoroborate ([bmim] [BF4]) and 1-(2-aminoethyl) piperazine (AEP) /bis (3-aminopropyl) amine (APA) are studied theoretically using COSMO-RS and experimentally for CO2 capture application. The molecules are studied for describing relationship amid sigma-potential and sigma-surface with CO2 solubility. Important thermodynamic properties such as vapor pressure, Henry's constant have been evaluated using COSMO-RS method and compared with available experimentally obtained values. Essential binary interaction parameters of vapor liquid equilibrium of the solvents are estimated using NRTL and UNIQUAC 2 models. The work considers the measurements and modelling of CO2 solubility in conferred solvents over (303.15-323.15) K and (1-244) kPa, respectively. The investigational CO2 solubility data are associated with feed forward neural network model. Thermophysical properties of viscosity, and density have also been measured and modelled employing recognised models.