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

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