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Ionic liquids/deep eutectic solvents for CO2capture: Reviewing and evaluating

Authors :
Liu, Yanrong
Dai, Zhengxing
Zhang, Zhibo
Zeng, Shaojuan
Li, Fangfang
Zhang, Xiangping
Nie, Yi
Zhang, Lei
Zhang, Suojiang
Ji, Xiaoyan
Source :
Green Energy & Environment; June 2021, Vol. 6 Issue: 3 p314-328, 15p
Publication Year :
2021

Abstract

The CO2solubilities (including CO2Henry's constant) in physical- and chemical-based ILs/DESs and the COSMO-RS models describing these properties were comprehensively collected and summarized. The summarized results indicate that chemical-based ILs/DESs are superior to physical-based ILs/DESs for CO2capture, especially those ILs have functionalized cation and anion, and superbase DESs; some of the superbase DESs have higher CO2solubilities than those of ILs; the best physical- and chemical-based ILs, as well as physical- and chemical-based DESs are [BMIM][BF4] (4.20 mol kg−1), [DETAH][Im] (11.91 mol kg−1), [L-Arg]-Gly 1:6 (4.92 mol kg−1) and TBD-EG 1:4 (12.90 mol kg−1), respectively. Besides the original COSMO-RS mainly providing qualitative predictions, six corrected COSMO-RS models have been proposed to improve the prediction performance based on the experimental data, but only one model is with universal parameters. The newly determined experimental results were further used to verify the perditions of original and corrected COSMO-RS models. The comparison indicates that the original COSMO-RS qualitatively predicts CO2solubility for some but not all ILs/DESs, while the quantitative prediction is incapable at all. The original COSMO-RS is capable to predict CO2Henry's constant qualitatively for both physical-based ILs and DESs, and quantitative prediction is only available for DESs. For the corrected COSMO-RS models, only the model with universal parameters provides quantitative predictions for CO2solubility in physical-based DESs, while other corrected models always show large deviations (> 83%) compared with the experimental CO2Henry's constants.

Details

Language :
English
ISSN :
24680257
Volume :
6
Issue :
3
Database :
Supplemental Index
Journal :
Green Energy & Environment
Publication Type :
Periodical
Accession number :
ejs54727979
Full Text :
https://doi.org/10.1016/j.gee.2020.11.024