Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.184
Publication date: 11th July 2022
Energy- and cost-efficient CO2 capture is of crucial importance for its subsequent viable utilization. Ionic liquids (ILs) have emerged as a promising material for reducing carbon dioxide emissions from large-scale sources due to their properties and versatility. ILs are considered green solvents with high thermal stability, tunable structure, low volatility, and a strong affinity for CO2 molecules. These properties of ILs make them a potential alternative to amine-based CO2 capture processes. The challenges of using ILs come with their high viscosity, which causes unfavorable transport barriers. Encapsulated ionic liquid has been proposed to overcome mass transfer limitations, increasing the contact between gas and liquid, and improving the mass transfer rate. This study showed the development of new materials, combining efficiency, safety, and sustainable processes. Water-based nanocapsules of Emim[BF4], using poly(ionic liquid) Poly(diallyldimethylammonium tetrafluoroborate) as shell, were successfully obtained by Nanospray dryer B-90. Capsules were characterized and have the potential for CO2 capture evaluated. The combination of these promising materials showed great potential for CO2 capture and CO2/N2 separation (53.4 mg CO2/g; CO2/N2 selectivity: 4.58). Thermal stability and the regeneration of this material after successive sorption–desorption cycles were also successfully demonstrated, emphasizing this as a potential alternative.
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