SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 58 ›› Issue (6): 355-363.DOI: 10.1016/j.cjche.2022.09.021

• Full Length Article • 上一篇    

Efficient SO2 removal using aqueous ionic liquid at low partial pressure

Yutong Jiang1, Yifeng Chen2,3, Fuliu Yang1, Jixue Fan1, Jun Li1, Zhuhong Yang1, Xiaoyan Ji4   

  1. 1. College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;
    2. Institute of Chemical Industry of Forest Products, CAF, Key Laboratory of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    3. Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
    4. Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå 97187, Sweden
  • 收稿日期:2022-04-18 修回日期:2022-09-23 出版日期:2023-06-28 发布日期:2023-08-31
  • 通讯作者: Yifeng Chen,E-mail:yfchen@icifp.cn;Zhuhong Yang,E-mail:zhhyang@njtech.edu.cn
  • 基金资助:
    We would like to thank the National Natural Science Foundation of China (22108115, 21776123). Y. Chen thanks China Postdoctoral Science Foundation funded project (2021 M691554) and Kempe foundation (SMK21-0020) in Sweden, and X. Ji thanks Swedish Energy Agency (P50830-1).

Efficient SO2 removal using aqueous ionic liquid at low partial pressure

Yutong Jiang1, Yifeng Chen2,3, Fuliu Yang1, Jixue Fan1, Jun Li1, Zhuhong Yang1, Xiaoyan Ji4   

  1. 1. College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;
    2. Institute of Chemical Industry of Forest Products, CAF, Key Laboratory of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    3. Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
    4. Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå 97187, Sweden
  • Received:2022-04-18 Revised:2022-09-23 Online:2023-06-28 Published:2023-08-31
  • Contact: Yifeng Chen,E-mail:yfchen@icifp.cn;Zhuhong Yang,E-mail:zhhyang@njtech.edu.cn
  • Supported by:
    We would like to thank the National Natural Science Foundation of China (22108115, 21776123). Y. Chen thanks China Postdoctoral Science Foundation funded project (2021 M691554) and Kempe foundation (SMK21-0020) in Sweden, and X. Ji thanks Swedish Energy Agency (P50830-1).

摘要: The development of novel absorbents is essential for SO2 removal. In this study, a novel ionic liquid (IL, [BHEP][HSO4]) was prepared, and water was selected as the co-solvent. The density and viscosity of aqueous [BHEP][HSO4] were measured and the SO2 absorption performance was systematically investigated. Furthermore, the thermodynamic properties of SO2 in aqueous [BHEP][HSO4] were calculated. Additionally, the mechanism of SO2 absorption in aqueous [BHEP][HSO4] was confirmed using Fourier-transform infrared and nuclear magnetic resonance spectroscopy. It showed that [BHEP][HSO4] absorbed 0.302 g·g-1 (g SO2/g IL) at an SO2 partial pressure of 2000 μl·L-1 at 303.2 K, and the SO2 desorption enthalpy was -39.63 kJ·mol-1. The mechanistic study confirmed the chemical absorption of SO2 in aqueous [BHEP][HSO4].

关键词: Ionic liquids, Sulfur dioxide, Absorption capacity, Desorption enthalpy

Abstract: The development of novel absorbents is essential for SO2 removal. In this study, a novel ionic liquid (IL, [BHEP][HSO4]) was prepared, and water was selected as the co-solvent. The density and viscosity of aqueous [BHEP][HSO4] were measured and the SO2 absorption performance was systematically investigated. Furthermore, the thermodynamic properties of SO2 in aqueous [BHEP][HSO4] were calculated. Additionally, the mechanism of SO2 absorption in aqueous [BHEP][HSO4] was confirmed using Fourier-transform infrared and nuclear magnetic resonance spectroscopy. It showed that [BHEP][HSO4] absorbed 0.302 g·g-1 (g SO2/g IL) at an SO2 partial pressure of 2000 μl·L-1 at 303.2 K, and the SO2 desorption enthalpy was -39.63 kJ·mol-1. The mechanistic study confirmed the chemical absorption of SO2 in aqueous [BHEP][HSO4].

Key words: Ionic liquids, Sulfur dioxide, Absorption capacity, Desorption enthalpy