Encapsulated Amino-Acid-Based Ionic Liquids for CO(2)Capture

authors	Silva, LP; Moya, C; Sousa, M; Santiago, R; Sintra, TE; Carreira, ARF; Palomar, J; Coutinho, JAP; Carvalho, PJ
nationality	International
journal	EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords	Absorption; Carbon dioxide capture; Encapsulation; Ionic liquids
keywords	POSTCOMBUSTION CO2 CAPTURE; CARBON-DIOXIDE; MEMBRANE CONTACTORS; ABSORPTION; KINETICS; SOLUBILITY; ACETATE; ANION; WATER; CAPSULES
abstract	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 CO(2)capture. The ENILs prepared using tetrabutylphosphonium acetate ([P-4,P-4,P-4,P-4][Ac]), used as reference, (2-hydroxyethyl)trimethylammoniuml-phenylalaninate ([N-1,N-1,N-1,N-2(OH)][L-Phe]), (2-hydroxyethyl)trimethylammoniuml-prolinate ([N-1,N-1,N-1,N-2(OH)][L-Pro]), and tetrabutylammoniuml-prolinate ([N-4,N-4,N-4,N-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 CO(2)on these materials was studied up to 0.5 MPa and 343 K. The desorption of CO(2)from the saturated ENILs was evaluated, under mild conditions, evidencing these materials as promising agents for CO(2)capture from post-combustion sources, with high sorption capacity and fast and complete regeneration.
publisher	WILEY-V C H VERLAG GMBH
issn	1434-1948
isbn	1099-0682
year published	2020
volume	2020
issue	33
beginning page	3158
ending page	3166
digital object identifier (doi)	10.1002/ejic.202000364
web of science category	Chemistry, Inorganic & Nuclear
subject category	Chemistry
unique article identifier	WOS:000556321200001