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CO(2) Absorption Mechanism by the Nonaqueous Solvent Consisting of Hindered Amine 2-[(1,1-dimethylethyl)amino]ethanol and Ethylene Glycol
In this work, we studied the CO(2) absorption mechanism by nonaqueous solvent comprising hindered amine 2-[(1,1-dimethylethyl)amino]ethanol (TBAE) and ethylene glycol (EG). The NMR and FTIR results indicated that CO(2) reacted with an -OH group of EG rather than the -OH of TBAE by producing hydroxye...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7729447/ https://www.ncbi.nlm.nih.gov/pubmed/33291408 http://dx.doi.org/10.3390/molecules25235743 |
Sumario: | In this work, we studied the CO(2) absorption mechanism by nonaqueous solvent comprising hindered amine 2-[(1,1-dimethylethyl)amino]ethanol (TBAE) and ethylene glycol (EG). The NMR and FTIR results indicated that CO(2) 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-CH(2)-CH(2)-O-; in the second step, the O(−) of HO-CH(2)-CH(2)-O(−) attacked the C atom of CO(2), forming carbonate species. |
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