E-viri
PDF
Recenzirano
Odprti dostop
-
Li, Ran; Wu, Congyi; Yang, Dezhong
Molecules (Basel, Switzerland), 12/2020, Letnik: 25, Številka: 23Journal Article
In this work, we studied the CO2 absorption mechanism by nonaqueous solvent comprising hindered amine 2-(1,1-dimethylethyl)aminoethanol (TBAE) and ethylene glycol (EG). The NMR and FTIR results indicated that CO2 reacted with an -OH group of EG rather than the -OH of TBAE by producing hydroxyethyl carbonate species. A possible reaction pathway was suggested, which involves two steps. In the first step, the acid–base reaction between TBAE and EG generated the anion HO-CH2-CH2-O-; in the second step, the O− of HO-CH2-CH2-O− attacked the C atom of CO2, forming carbonate species.
