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H2S Absorption with Deep Eutectic Solvents: Low Partial Pressure Capture and Thermodynamic Analysis
  • +2
  • Bo Wang,
  • Xuhao Xie,
  • Lurui Wan,
  • Yuan Chen,
  • Wenbo Zhao
Bo Wang

Corresponding Author:[email protected]

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Yuan Chen
Kunming University of Science and Technology
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Wenbo Zhao
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In the present work, a series of deep eutectic solvents (DESs) based on organic amine as hydrogen bond acceptors (HBAs), and ethylene glycol (EG) as hydrogen bond donor (HBD) were prepared for the H2S absorption. Thermal decomposition temperature, HBA mass ratios, alkalinity and structure effect on absorption behavior were systematically investigated. The reaction mechanism was demonstrated by FT-IR and 1H NMR spectroscopy. The reaction equilibrium constants, Henry constant, enthalpy and entropy change were calculated based on the thermodynamic model to reveal the interactions between DESs and H2S. It is found that H2S absorption capacities of the most of DESs with HBA/HBD mass ratio of 1:4 were close to 1mol /mol at 303.15K and 0.2 bar. The absorption capacity of DESs depends on the alkalinity and structure of HBAs; Additionally, a good linear correlation between the alkalinity of HBA and the absorption equilibrium constant (lnK) of DESs to H2S was found
02 Nov 2022Submitted to AIChE Journal
03 Nov 2022Review(s) Completed, Editorial Evaluation Pending
03 Nov 2022Submission Checks Completed
03 Nov 2022Assigned to Editor
07 Nov 2022Reviewer(s) Assigned
07 Jan 2023Editorial Decision: Revise Major
03 Feb 20231st Revision Received
07 Feb 2023Submission Checks Completed
07 Feb 2023Assigned to Editor
07 Feb 2023Review(s) Completed, Editorial Evaluation Pending
07 Mar 2023Editorial Decision: Accept