SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 67 ›› Issue (3): 97-105.DOI: 10.1016/j.cjche.2023.10.012

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Efficient and reversible separation of NH3 by deep eutectic solvents with multiple active sites and low viscosities

Jiayin Zhang1, Lu Zheng1, Siqi Fang1, Hongwei Zhang1, Zhenping Cai1, Kuan Huang1,2, Lilong Jiang1,2   

  1. 1 National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2 Qingyuan Innovation Laboratory, Quanzhou 362801, China
  • 收稿日期:2023-07-09 修回日期:2023-10-25 出版日期:2024-03-28 发布日期:2024-06-01
  • 通讯作者: Kuan Huang,E-mail address:huangk@fzu.edu.cn;Lilong Jiang,E-mail address:jll@fzu.edu.cn.
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22221005 and 22008033).

Efficient and reversible separation of NH3 by deep eutectic solvents with multiple active sites and low viscosities

Jiayin Zhang1, Lu Zheng1, Siqi Fang1, Hongwei Zhang1, Zhenping Cai1, Kuan Huang1,2, Lilong Jiang1,2   

  1. 1 National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2 Qingyuan Innovation Laboratory, Quanzhou 362801, China
  • Received:2023-07-09 Revised:2023-10-25 Online:2024-03-28 Published:2024-06-01
  • Contact: Kuan Huang,E-mail address:huangk@fzu.edu.cn;Lilong Jiang,E-mail address:jll@fzu.edu.cn.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22221005 and 22008033).

摘要: The efficient separation and collection of ammonia (NH3) during NH3 synthesis process is essential to improve the economic efficiency and protect the environment. In this work, ethanolammonium hydrochloride (EtOHACl) and phenol (PhOH) were used to prepare a novel class of deep eutectic solvents (DESs) with multiple active sites and low viscosities. The NH3 separation performance of EtOHACl + PhOH DESs was analyzed completely. It is figured out that the NH3 absorption rates in EtOHACl + PhOH DESs are very fast. The NH3 absorption capacities are very high and reach up to 5.52 and 10.74 mol·kg-1 at 11.2 and 100.4 kPa under 298.2 K, respectively. In addition, the EtOHACl + PhOH DESs present highly selective absorption of NH3 over N2 and H2 and good regenerative properties after seven cycles of absorption/desorption. The intrinsic separation mechanism of NH3 by EtOHACl + PhOH DESs was further revealed by spectroscopic analysis and quantum chemistry calculations.

关键词: Separation, Absorption, Ionic liquid, Deep eutectic solvent, Multiple active site, Low viscosity

Abstract: The efficient separation and collection of ammonia (NH3) during NH3 synthesis process is essential to improve the economic efficiency and protect the environment. In this work, ethanolammonium hydrochloride (EtOHACl) and phenol (PhOH) were used to prepare a novel class of deep eutectic solvents (DESs) with multiple active sites and low viscosities. The NH3 separation performance of EtOHACl + PhOH DESs was analyzed completely. It is figured out that the NH3 absorption rates in EtOHACl + PhOH DESs are very fast. The NH3 absorption capacities are very high and reach up to 5.52 and 10.74 mol·kg-1 at 11.2 and 100.4 kPa under 298.2 K, respectively. In addition, the EtOHACl + PhOH DESs present highly selective absorption of NH3 over N2 and H2 and good regenerative properties after seven cycles of absorption/desorption. The intrinsic separation mechanism of NH3 by EtOHACl + PhOH DESs was further revealed by spectroscopic analysis and quantum chemistry calculations.

Key words: Separation, Absorption, Ionic liquid, Deep eutectic solvent, Multiple active site, Low viscosity