Energy-efficient regeneration of amine-based solvent with environmentally friendly ionic liquid catalysts for CO2 capture.
In: Chemical Engineering Science, Jg. 283 (2024-01-05), S. N.PAG
academicJournal
Zugriff:
• This is the first study on CO 2 capture using green ionic liquids catalysts. • A series of ionic liquids catalyst successfully decreased the relative heat duty. • The [Bmim]PF 6 catalyst presented superior catalytic performance. • This work provides an efficient strategy for MEA regeneration with homogeneous catalysts. Catalytic CO 2 desorption from rich amine solution is a practical approach to reducing energy consumption for amine regeneration. In this study, for the first time, the catalytic effect of environmentally friendly, imidazole series ionic liquids ([Bmim]PF 6 , [Bmim]BF 4 , [Bmim]HSO 4 , [Bmim]NO 3 , [Bmim]CH 3 COOH, [Bmim]Cl, [Bmim]Br, and [Bmim]I) is evaluated in terms of CO 2 desorption rate, amount of CO 2 released, and heat duty. Overall, the [Bmim]PF 6 catalyst shows excellent catalytic activity for CO 2 desorption, increasing the quantity of CO 2 released by 21.35% and reducing the relative heat duty by 17.59%. In addition, the catalytic applicability of [Bmim]PF 6 for secondary and tertiary amine systems was evaluated. Of note, the homogeneous [Bmim]PF 6 catalyst presents good stability during 5 cycles. The catalyst/MEA (monoethanolamine) solution ratio of 3 wt% retained about 94% of the catalytic performance after five cycling tests without any reactivation step, showing the potential application of this desorption technology for CO 2 capture with lower heat duty. [ABSTRACT FROM AUTHOR]
Titel: |
Energy-efficient regeneration of amine-based solvent with environmentally friendly ionic liquid catalysts for CO2 capture.
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Autor/in / Beteiligte Person: | Sun, Qiang ; Xiong, Jia ; Gao, Hongxia ; Olson, Wilfred ; Liang, Zhiwu |
Zeitschrift: | Chemical Engineering Science, Jg. 283 (2024-01-05), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0009-2509 (print) |
DOI: | 10.1016/j.ces.2023.119380 |
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