SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 123-134.DOI: 10.1016/j.cjche.2024.09.022

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Dha Tab-COF filled PEBAX mixed matrix membranes for effective CO2/CH4 separation

Yuankai Pan1, Xingmei Zhang2, Wenwen He3, Lan Zheng1, Xiaolong Han1   

  1. 1. School of Chemical Engineering, Northwest University, Xi'an 710069, China;
    2. School of Chemical Engineering, Xi'an University, Xi'an 710065, China;
    3. School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
  • 收稿日期:2024-07-01 修回日期:2024-09-23 接受日期:2024-09-25 出版日期:2025-01-28 发布日期:2024-11-05
  • 通讯作者: Wenwen He,E-mail:heww@ccut.edu.cn;Xiaolong Han,E-mail:hanxl@nwu.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (No. 22271022, No 22378327).

Dha Tab-COF filled PEBAX mixed matrix membranes for effective CO2/CH4 separation

Yuankai Pan1, Xingmei Zhang2, Wenwen He3, Lan Zheng1, Xiaolong Han1   

  1. 1. School of Chemical Engineering, Northwest University, Xi'an 710069, China;
    2. School of Chemical Engineering, Xi'an University, Xi'an 710065, China;
    3. School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
  • Received:2024-07-01 Revised:2024-09-23 Accepted:2024-09-25 Online:2025-01-28 Published:2024-11-05
  • Contact: Wenwen He,E-mail:heww@ccut.edu.cn;Xiaolong Han,E-mail:hanxl@nwu.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (No. 22271022, No 22378327).

摘要: Covalent organic skeletons (COFs) have been widely used in gas separation due to their excellent pore structure, high crystallinity, and high specific surface area. In this work, Dha Tab-COF was synthesized by solvothermal method and filled in polyether block polyamide (PEBAX) to form mixed matrix membranes (MMMs). Various characterization methods such as Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffractometry (XRD) were used to characterize the structure of Dha Tab-COF as well as the MMMs. The effects of operating pressure, operating temperature and the content of Dha Tab-COF particles on the CO2/CH4 separation performance of the membranes were investigated. The best separation performance with a CO2 permeability of 295.8 barrer (1 barrer = 7.52×10-18 m3·(STP)·m-2·m·s-1·Pa-1) and a CO2/CH4 selectivity of 21.6 was achieved when the Dha Tab-COF content is 2% (mass), which were 45.7% and 108.1% higher than that of the pure PEBAX membrane, respectively.

关键词: Covalent organic framework (COFs), Polyether block polyamide (PEBAX), Mixed matrix membranes, CO2 separation membrane

Abstract: Covalent organic skeletons (COFs) have been widely used in gas separation due to their excellent pore structure, high crystallinity, and high specific surface area. In this work, Dha Tab-COF was synthesized by solvothermal method and filled in polyether block polyamide (PEBAX) to form mixed matrix membranes (MMMs). Various characterization methods such as Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffractometry (XRD) were used to characterize the structure of Dha Tab-COF as well as the MMMs. The effects of operating pressure, operating temperature and the content of Dha Tab-COF particles on the CO2/CH4 separation performance of the membranes were investigated. The best separation performance with a CO2 permeability of 295.8 barrer (1 barrer = 7.52×10-18 m3·(STP)·m-2·m·s-1·Pa-1) and a CO2/CH4 selectivity of 21.6 was achieved when the Dha Tab-COF content is 2% (mass), which were 45.7% and 108.1% higher than that of the pure PEBAX membrane, respectively.

Key words: Covalent organic framework (COFs), Polyether block polyamide (PEBAX), Mixed matrix membranes, CO2 separation membrane