Journal
MOLECULES
Volume 28, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/molecules28145461
Keywords
CO2 capture; absorption; deep eutectic solvents; mechanism; proline
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In this study, the deep eutectic solvents (DESs) [Ch][Pro](-)EG were synthesized using choline prolinate ([Ch][Pro]) as a hydrogen bond acceptor and ethylene glycol (EG) as a hydrogen bond donor to capture CO2. The results indicate that CO2 reacts with both the amino group of [Pro](-)anion and the hydroxyl group of EG, which differs from the mechanism reported in the literature for [Ch][Pro](-)EG DESs.
The choline prolinate ([Ch][Pro]) as a hydrogen bond acceptor and ethylene glycol (EG) as a hydrogen bond donor are both used to synthesize the deep eutectic solvents (DESs) [Ch][Pro](-)EG to capture CO2. The CO2 capacity of [Ch][Pro](-)EG is determined, and the nuclear magnetic resonance (NMR) and infrared (IR) spectrum are used to investigate the CO(2 )capture mechanism. The results indicate that CO2 reacts with both the amino group of [Pro](- )anion and the hydroxyl group of EG, and the mechanism found in this work is different from that reported in the literature for the [Ch][Pro](-)EG DESs.
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