Experimental and COSMO-RS analysis of CO 2 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 (CO 2 ) from large point sources. Anew proposed aqueous solvent blends of 1-butyl-3-methyl-imidazolium tetrafluoroborate ([bmim] [BF 4 ]) and 1-(2-aminoethyl) piperazine (AEP) /bis (3-aminopropyl) amine (APA) are studied theoretically using COSMO-RS and experimentally for CO 2 capture application. The molecules are studied for describing relationship amid sigma-potential and sigma-surface with CO 2 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 CO 2 solubility in conferred solvents over (303.15˗323.15) K and (1−244) kPa, respectively. The investigational CO 2 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.