SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 43 ›› Issue (3): 169-176.DOI: 10.1016/j.cjche.2022.02.006

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The effect of protic ionic liquids incorporation on CO2 separation performance of Pebax-based membranes

Haiyan Jiang1,2, Lu Bai1, Bingbing Yang1, Shaojuan Zeng1, Haifeng Dong1,3, Xiangping Zhang1,3   

  1. 1. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
  • Received:2021-08-25 Revised:2022-02-11 Online:2022-04-28 Published:2022-03-28
  • Contact: Lu Bai,E-mail:lbai1207@ipe.ac.cn;Xiangping Zhang,E-mail:xpzhang@ipe.ac.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (2020YFA0710200), the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (21921005), the Major Scientific and Technological Project of Shanxi Province of China (20201102005), the Youth Innovation Promotion Association of the Chinese Academy of Sciences (2020047) and the Innovation Academy for Green Manufacture, Chinese Academy of Sciences (IAGM2020C15).

The effect of protic ionic liquids incorporation on CO2 separation performance of Pebax-based membranes

Haiyan Jiang1,2, Lu Bai1, Bingbing Yang1, Shaojuan Zeng1, Haifeng Dong1,3, Xiangping Zhang1,3   

  1. 1. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
  • 通讯作者: Lu Bai,E-mail:lbai1207@ipe.ac.cn;Xiangping Zhang,E-mail:xpzhang@ipe.ac.cn
  • 基金资助:
    This work was supported by the National Key R&D Program of China (2020YFA0710200), the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (21921005), the Major Scientific and Technological Project of Shanxi Province of China (20201102005), the Youth Innovation Promotion Association of the Chinese Academy of Sciences (2020047) and the Innovation Academy for Green Manufacture, Chinese Academy of Sciences (IAGM2020C15).

Abstract: The separation of carbon dioxide (CO2) is of great importance for environment protection and gas resource purification. The ionic liquids (ILs)-based gas separation membrane provides a new chance for efficient CO2 separation, while high permeability and selectivity of membranes is a great challenge. In this study, the influence of two protic ILs with different anion ([TMGH][Im] and [TMGH][PhO]) on the CO2 separation performance of the prepared ILs/Pebax blended membranes were systematically investigated at different temperature. The results showed the CO2 permeability exhibits the rising trend for ILs/Pebax blended membranes with the increment of IL content. Especially, the [TMGH][Im] with low viscosity and high CO2 absorption capacity leads to the blended membranes showing better CO2 permeability and ideal CO2 selectivity than that of membranes with [TMGH][PhO] at high IL content. Besides, with operating temperature increasing, the gas permeability of 20% (mass) [TMGH][Im]/Pebax blended membrane increases due to the decreasing viscosity of IL and the rising chain mobility of polymer. Inversely, the gas selectivity shows decreasing trend because CO2 absorption capacity obviously decreased at higher temperature.

Key words: CO2, Protic ionic liquids, Membranes, Pebax

摘要: The separation of carbon dioxide (CO2) is of great importance for environment protection and gas resource purification. The ionic liquids (ILs)-based gas separation membrane provides a new chance for efficient CO2 separation, while high permeability and selectivity of membranes is a great challenge. In this study, the influence of two protic ILs with different anion ([TMGH][Im] and [TMGH][PhO]) on the CO2 separation performance of the prepared ILs/Pebax blended membranes were systematically investigated at different temperature. The results showed the CO2 permeability exhibits the rising trend for ILs/Pebax blended membranes with the increment of IL content. Especially, the [TMGH][Im] with low viscosity and high CO2 absorption capacity leads to the blended membranes showing better CO2 permeability and ideal CO2 selectivity than that of membranes with [TMGH][PhO] at high IL content. Besides, with operating temperature increasing, the gas permeability of 20% (mass) [TMGH][Im]/Pebax blended membrane increases due to the decreasing viscosity of IL and the rising chain mobility of polymer. Inversely, the gas selectivity shows decreasing trend because CO2 absorption capacity obviously decreased at higher temperature.

关键词: CO2, Protic ionic liquids, Membranes, Pebax