Enhanced CO2 capture efficiency applying amine-based nano magnetite/sulfinol-M nano solvents at high pressures.

Recently, extensive researches were performed on carbon dioxide (CO2) capture using nano solvents. In this study, three different modified magnetic nanoparticles (NPs), including Fe3O4-Proline (Fe3O4-P), Fe3O4-Lysine (Fe3O4-L), and Fe3O4@SiO2-NH2 NPs were produced to alter and enhance the properties of Fe3O4 NPs for CO2 capture in sulfinol-M as a base solvent. CO2 capture experiments were carried out in a high-pressure batch apparatus in which CO2 absorbed into sulfinol/nano-sulfinol. The influences of NP type, NP loading, and gas phase pressure on CO2 capture were studied. Based on the obtained results, Fe3O4-L and Fe3O4@SiO2-NH2 NPs are notably capable on increasing the CO2 capture capacity of sulfinol-M, and they improved CO2 capture up to 6.3% and 13.36% as compared with the base fluid. Moreover, experiments indicated that all nanosolutions have higher CO2 capture efficiency at higher pressures. Eventually, the effect of NPs stability on CO2 capture was investigated and discussed.