Encapsulated Amino‐Acid‐Based Ionic Liquids for CO2 Capture

Ionic liquids have gathered special attention due to their potential for carbon dioxide capture, and their potential as solvents for mitigation of climate change. Following the scope of previous works, amino‐acid‐based ionic liquids encapsulated (ENILs) into carbonaceous submicrocapsules are here pr...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2020-09, Vol.2020 (33), p.3158-3166
Main Authors: Silva, Liliana P., Moya, Cristian, Sousa, Marco, Santiago, Ruben, Sintra, Tania E., Carreira, Ana R. F., Palomar, José, Coutinho, João A. P., Carvalho, Pedro J.
Format: Article
Language:English
Subjects:
Absorption
Carbon dioxide
Carbon dioxide capture
Carbon sequestration
Chemical composition
Encapsulation
Inorganic chemistry
Ionic liquids
Ions
Morphology
Regeneration
Stability analysis
Structural stability
Thermal stability
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Summary:Ionic liquids have gathered special attention due to their potential for carbon dioxide capture, and their potential as solvents for mitigation of climate change. Following the scope of previous works, amino‐acid‐based ionic liquids encapsulated (ENILs) into carbonaceous submicrocapsules are here proposed as a novel material for CO2 capture. The ENILs prepared using tetrabutylphosphonium acetate ([P4,4,4,4][Ac]), used as reference, (2‐hydroxyethyl)trimethylammonium l‐phenylalaninate ([N1,1,1,2(OH)][L‐Phe]), (2‐hydroxyethyl)trimethylammonium l‐prolinate ([N1,1,1,2(OH)][L‐Pro]), and tetrabutylammonium l‐prolinate ([N4,4,4,4][L‐Pro]) were characterized by SEM, TEM, elemental analysis, TGA, and BET to assess their morphology, chemical composition, porous structure, and thermal stability. The absorption of CO2 on these materials was studied up to 0.5 MPa and 343 K. The desorption of CO2 from the saturated ENILs was evaluated, under mild conditions, evidencing these materials as promising agents for CO2 capture from post‐combustion sources, with high sorption capacity and fast and complete regeneration. The absorption of CO2 on amino‐acid‐based ionic liquids, encapsulated into carbonaceous submicrocapsules (ENILs) are proposed as novel promising agents for CO2 capture from post‐combustion sources, with high sorption capacity and fast and complete regeneration.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.202000364