SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 61 ›› Issue (9): 82-89.DOI: 10.1016/j.cjche.2023.03.002

• Full Length Article • 上一篇    下一篇

Enhancing hydrophobicity via core–shell metal organic frameworks for high-humidity flue gas CO2 capture

Yinji Wan1, Dekai Kong1, Feng Xiong2, Tianjie Qiu2, Song Gao2, Qiuning Zhang1, Yefan Miao1, Mulin Qin2, Shengqiang Wu2, Yonggang Wang2, Ruiqin Zhong1, Ruqiang Zou2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China;
    2. Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, China
  • 收稿日期:2022-10-27 修回日期:2023-03-10 出版日期:2023-09-28 发布日期:2023-12-14
  • 通讯作者: Ruiqin Zhong,E-mail:rzhong@cup.edu.cn;Ruqiang Zou,E-mail:rzou@pku.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51772329, 51972340, and 51825201).

Enhancing hydrophobicity via core–shell metal organic frameworks for high-humidity flue gas CO2 capture

Yinji Wan1, Dekai Kong1, Feng Xiong2, Tianjie Qiu2, Song Gao2, Qiuning Zhang1, Yefan Miao1, Mulin Qin2, Shengqiang Wu2, Yonggang Wang2, Ruiqin Zhong1, Ruqiang Zou2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China;
    2. Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, China
  • Received:2022-10-27 Revised:2023-03-10 Online:2023-09-28 Published:2023-12-14
  • Contact: Ruiqin Zhong,E-mail:rzhong@cup.edu.cn;Ruqiang Zou,E-mail:rzou@pku.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51772329, 51972340, and 51825201).

摘要: Developing metal–organic framework (MOF) materials with the moisture-resistant feature is highly desirable for CO2 capture from highly humid flue gas. In this work, a new core–shell MOF@MOF composite using Mg-MOF-74 with high CO2 capture capacity as a functional core and hydrophobic zeolitic imidazolate framework-8 (ZIF-8) as a protective shell is fabricated by the epitaxial growth method. Experimental results show that the CO2 adsorption performance of the core–shell structured Mg-MOF-74@ZIF-8 composites from water-containing flue gas is enhanced along with their improved hydrophobicity. The dynamic breakthrough results show that the Mg-MOF-74@ZIF-8 with three assembled layers (Mg-MOF-74@ZIF-8-3) can capture 3.56 mmol·g-1 CO2 from wet CO2/N2 (VCO2 : VN2 = 15:85) mixtures, which outperforms Mg-MOF-74 (0.37 mmol·g-1) and most of the reported physisorbents.

关键词: Core–shell, Mg-MOF-74@ZIF-8, CO2 capture, Hydrophobic effect

Abstract: Developing metal–organic framework (MOF) materials with the moisture-resistant feature is highly desirable for CO2 capture from highly humid flue gas. In this work, a new core–shell MOF@MOF composite using Mg-MOF-74 with high CO2 capture capacity as a functional core and hydrophobic zeolitic imidazolate framework-8 (ZIF-8) as a protective shell is fabricated by the epitaxial growth method. Experimental results show that the CO2 adsorption performance of the core–shell structured Mg-MOF-74@ZIF-8 composites from water-containing flue gas is enhanced along with their improved hydrophobicity. The dynamic breakthrough results show that the Mg-MOF-74@ZIF-8 with three assembled layers (Mg-MOF-74@ZIF-8-3) can capture 3.56 mmol·g-1 CO2 from wet CO2/N2 (VCO2 : VN2 = 15:85) mixtures, which outperforms Mg-MOF-74 (0.37 mmol·g-1) and most of the reported physisorbents.

Key words: Core–shell, Mg-MOF-74@ZIF-8, CO2 capture, Hydrophobic effect