Impact of water on CO2 capture by amino acid ionic liquids

Regeneration performance and absorption/desorption mechanism of tetramethylammonium glycinate aqueous solution for carbon dioxide capture

“…In the 13 C NMR spectra (Fig. 7), after capturing CO 2 , the peak of [N 1111 ] + did not significantly change, whereas a new peak observed at 160 ppm was attributed to HCO 3 − or CO 3 2− (Hartono et al, 2011;McDonald et al, 2013). Moreover, each peak associated with the glycinate anion shifted measurably.…”

“…The carbonyl carbon and methylene carbon of glycine shifted from 180.7 ppm to 172.5 ppm and from 50.0 ppm to 41.8 ppm, respectively. McDonald et al (2013) indicated that this phenomenon began with the absorption of protons jettisoned during carbamate formation, and continued as carbamate was consumed, giving way to carbonate/bicarbonate. Eventually, the most significant capture mode was carbonate/bicarbonate formation.…”

Tuning the Carbon Dioxide Absorption in Amino Acid Ionic Liquids

“…[19-21, 41, 43, 44] The high viscosities of AAILs before CO 2 absorption and their dramatic increase after CO 2 absorption have led to the investigation of methods to reduce the viscosity, prevent its increase, or both. Mixtures of AAILs with water [27,45,46] or low-viscosity ILs, [47,48] the immobilization of AAILs into porous materials, [16,40,42,49] and AAILs with the possibilities to form intramolecular hydrogen bonds [50] have been considered. However, the available theoretical work deals with density functional theory calculations of several aminefunctionalized anions and cations [51,52] to explain the 1:2 or 1:1 absorption capacity owing to the stabilization or destabilization effect of the cation or anion on the carbamic acid.…”

Facile one-pot synthesis of glycidol from glycerol and dimethyl carbonate catalyzed by tetraethylammonium amino acid ionic liquids

“…In recent years, amino acid ionic liquids have attracted much attention owing to their cheap cost and environment-friendly characteristics [21,22]. Because of their certain basicities, they could provide a potential application in the one-pot synthesis of glycidol.…”