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Preliminary quantitative study on solvent functional groups promoting CO2 absorption
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DOI：10.1016/j.molliq.2021.118449.png)
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In this paper, the mutual interaction parameters of -CH2, -CO3, -CH3 and CO2 based on the UNIFAC model are regressed using experimental data and literature data. As shown in results, increases in the number of -CH2 and -CO3 groups significantly improved CO2 absorption. Consequently, a new absorbent, dimethyl 2,5-dioxahexanedioate (DMC-C2), was developed to increase the number of functional groups -CH2 and -CO3 in green absorbent DMC for CO2. The Henry's constant in the new absorbent at 303.15 K, 313.15 K, and 323.15 K is lower than that in DMC, being 13.62%, 16.17%, and 17.72%, respectively. The above studies show that the increase in the number of -CH2 and -CO3 functional groups causes the decrease in the activity coefficient of CO2 to be the main reason for the enhancement of the CO2 absorption effect. (C) 2022 Elsevier B.V. All rights reserved.
Keyword:
Interaction parameter
UNIFAC model
Dimethyl 2,5-dioxahexanedioate
CO2 solubility
Activity coefficient
期刊
IF:
5.2
论文数:
2.5W
被引数:
9.0W
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