Studies on CO<sub>2</sub> absorption performance by imidazole-based ionic liquid mixtures

WANG Mei; ZHANG Li-qi; LIU Hao; ZHANG Jun-ying; ZHENG Chu-guang

Volume 40 Issue 10

Oct. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(10): 1264-1268

WANG Mei, ZHANG Li-qi, LIU Hao, ZHANG Jun-ying, ZHENG Chu-guang. Studies on CO2 absorption performance by imidazole-based ionic liquid mixtures[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1264-1268.

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WANG Mei, ZHANG Li-qi, LIU Hao, ZHANG Jun-ying, ZHENG Chu-guang. Studies on CO₂ absorption performance by imidazole-based ionic liquid mixtures[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1264-1268.

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Studies on CO₂ absorption performance by imidazole-based ionic liquid mixtures

1.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;
2.
School of Chemical and Environmental Engineering, Hubei University of Technology, Wuhan 430068, China

Received Date: 2012-04-28
Rev Recd Date: 2012-07-14
Publish Date: 2012-10-31

Abstract

Abstract

Conventional and functional imidazole-based ionic liquids (abbr. ILs) were mixed based on their advantage and disadvantage on CO₂ reduction. Additionally, CO₂ absorption effect and regeneration performance of imidazole-based IL mixtures were discussed. It was showed that imidazole-based IL mixtures had good fluidity and smooth of transferring CO₂. It had better absorption capacity of CO₂ for the mixtures of [bmim][BF₄] (or [bmim][Tf₂N]) and [NH₂e-mim][BF₄] than the single IL, and lower absorption capacity for the mixtures of [bmim][CH₃CO₂] and [NH₂e-mim][BF₄] than [bmim][CH₃CO₂]. While the cation of conventional imidazolium ILs became longer and the mixtures could absorb CO₂ more obviously, more strong effect was shown on CO₂ absorption with the anion [Tf₂N] than the anion [BF₄] for the conventional imidazolium IL. CO₂ absorption capacity of the imidazole-based IL mixtures had maintained 75%~85% of the initial capacity during 10 times of the absorption/regeneration cycles, while the quality of the regeneration was unchanged.
- imidazole-based ionic liquids,
- CO₂ emission reduction,
- CO₂ absorption,
- regeneration performance

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References(19)

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