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Highly Efficient Absorption of CO₂ by Protic Ionic Liquids-Amine Blends at High Temperatures.

ABSTRACT: In view of the increasingly serious harm of CO₂ to the environment, it is highly desirable to develop effective CO₂ absorbents. In this work, we demonstrated an efficient absorption of CO₂ by blends of protic ionic liquids (PILs) plus amines. The density and viscosity of investigative four PILs-amine mixtures were measured. By systematically studying the effects of the solution ratio, temperature, CO₂ partial pressure, and water content on the absorption of CO₂, it is found that the 3-dimethylamino-1-propylamine acetate ([DMAPAH][OAc]) plus ethanediamine (EDA) mixture shows the highest CO₂ uptake of 0.295 g CO₂ per g absorbent at 50 °C and 1 bar and a further increase in the absorption of CO₂ to 0.299 g/g by adding water with a mass fraction of 20%. Furthermore, the absorption mechanism of CO₂ in the presence and absence of water has also been investigated by FTIR and NMR spectra.

SUBMITTER: Li C

PROVIDER: S-EPMC8675009 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature

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Highly Efficient Absorption of CO2 by Protic Ionic Liquids-Amine Blends at High Temperatures.

Li Cheng C Zhao Tianxiang T Yang Anjie A Liu Fei F

ACS omega 20211203 49

In view of the increasingly serious harm of CO2 to the environment, it is highly desirable to develop effective CO2 absorbents. In this work, we demonstrated an efficient absorption of CO2 by blends of protic ionic liquids (PILs) plus amines. The density and viscosity of investigative four PILs-amine mixtures were measured. By systematically studying the effects of the solution ratio, temperature, CO2 partial pressure, and water content on the absorpti ...[more]

PMID: 34926950

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