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Novel amino acid ionic liquids prepared via one-step lactam hydrolysis for the highly-efficient capture of CO2
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  • Shuyue Wen,
  • Tao Wang,
  • Xiaomin Zhang,
  • Weigao Xu,
  • Xingbang Hu,
  • Youting Wu
Shuyue Wen
Nanjing University
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Tao Wang
Nanjing University
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Xiaomin Zhang
Nanjing University

Corresponding Author:[email protected]

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Weigao Xu
Nanjing University
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Xingbang Hu
Nanjing University
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Youting Wu
Nanjing University
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This paper proposes for the first time the preparation of a series of amino acid ionic liquids (AAILs) via one-step hydrolysis of cheap lactams for the capture of CO2. The structures of the prepared AAILs are confirmed using NMR, FTIR, and ESIMS, and their physical properties are also determined. It is found that these AAILs are reversible CO2 absorbents with very high absorption capacities (0.15 to 0.18 g·g1 at 313.2 K and 1.0 bar), better than almost all task-specific ionic liquids reported in literatures. The absorption mechanism is also elucidated to be a combination of 1:1 and 2:1 stoichiometric reaction of AAILs with CO2 from NMR, FTIR, reaction equilibrium thermodynamical modelling (RETM) and quantum calculations. The AAILs have the advantages of simple synthesis, high yield, and using available cheap raw materials. It is believed that this kind of AAILs have great potentials to be used as efficient CO2 absorbents.
24 Mar 2023Submitted to AIChE Journal
27 Mar 2023Submission Checks Completed
27 Mar 2023Assigned to Editor
27 Mar 2023Review(s) Completed, Editorial Evaluation Pending
07 Apr 2023Reviewer(s) Assigned
27 May 2023Editorial Decision: Revise Major
10 Jun 20231st Revision Received
15 Jun 2023Submission Checks Completed
15 Jun 2023Assigned to Editor
15 Jun 2023Review(s) Completed, Editorial Evaluation Pending
25 Jun 2023Reviewer(s) Assigned
25 Jul 2023Editorial Decision: Accept