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Performance and pressure drop of CO2 absorption into task-specific and halide-free ionic liquids in a microchannel
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  • Daofan Ma,
  • Chunying Zhu,
  • Taotao Fu,
  • Youguang Ma,
  • Xigang Yuan
Daofan Ma
Tianjin University

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Chunying Zhu
Tianjin University
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Taotao Fu
Tianjin University
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Youguang Ma
Tianjin University
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Xigang Yuan
Tianjin University
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The gas-liquid two-phase flow pattern, absorption rate and pressure drop of CO2 absorbed into the aqueous solution of the task-specific ionic liquid (1-aminopropyl-3-methylimidazole tetrafluoroborate [Apmim][BF4] and 1- hydroxyethyl-3-methylimidazole tetrafluoroborate [OHemim][BF4]) and halide-free ionic liquid 1- butyl -3-methylimidazolium methylsulfate [Bmim][CH3SO4] were investigated in a microreactor. The absorption mechanism of the three ionic liquids was analyzed employing the 13C NMR spectroscopy. The [Apmim][BF4] was found to have the best ability of CO2 capture compared to the other two ionic liquids, as chemical absorption occurred between [Apmim][BF4] and CO2, while only physical absorption took place between [OHemim][BF4] / [Bmim][CH3SO4] and CO2. The sequence of CO2 absorption rate in three ionic liquid aqueous solutions is: [Apmim][BF4] > [Bmim][CH3SO4] >[OHemim][BF4]. Furthermore, the effects of gas-liquid flow rate and ionic liquids concentration on CO2 absorption rate and pressure drop were studied, the pressure drop models based on various flow patterns were proposed.
11 Aug 2021Submitted to AIChE Journal
15 Aug 2021Submission Checks Completed
15 Aug 2021Assigned to Editor
21 Aug 2021Reviewer(s) Assigned
12 Oct 2021Editorial Decision: Revise Major
18 Nov 20211st Revision Received
20 Nov 2021Submission Checks Completed
20 Nov 2021Assigned to Editor
21 Nov 2021Reviewer(s) Assigned
17 Dec 2021Editorial Decision: Revise Minor
24 Dec 20212nd Revision Received
26 Dec 2021Submission Checks Completed
26 Dec 2021Assigned to Editor
30 Dec 2021Reviewer(s) Assigned
16 Jan 2022Editorial Decision: Accept