SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 39 ›› Issue (11): 88-95.DOI: 10.1016/j.cjche.2021.03.010

• Separation Science and Engineering • 上一篇    下一篇

Selective adsorption of SF6 in covalent- and metal-organic frameworks

Xianqiang Zheng1, Yanlong Shen2, Shitao Wang1, Ke Huang2, Dapeng Cao1   

  1. 1 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    2 State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi’an 710024, China
  • 收稿日期:2020-12-13 修回日期:2021-03-10 出版日期:2021-11-28 发布日期:2021-12-27
  • 通讯作者: Shitao Wang, Dapeng Cao
  • 基金资助:
    We are greatly thankful to the support from the Open Fund of the State Key Laboratory of Laser Interaction with Matter (SKLLIM1710).

Selective adsorption of SF6 in covalent- and metal-organic frameworks

Xianqiang Zheng1, Yanlong Shen2, Shitao Wang1, Ke Huang2, Dapeng Cao1   

  1. 1 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    2 State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi’an 710024, China
  • Received:2020-12-13 Revised:2021-03-10 Online:2021-11-28 Published:2021-12-27
  • Contact: Shitao Wang, Dapeng Cao
  • Supported by:
    We are greatly thankful to the support from the Open Fund of the State Key Laboratory of Laser Interaction with Matter (SKLLIM1710).

摘要: Sulfur hexafluoride (SF6) is an extremely severe greenhouse gas. It is an urgently important mission to find excellent candidates for selective adsorption of SF6, in order to reduce the emission of SF6 facilities. Here, we adopt the molecular simulation method to systematically explore the selective adsorption of SF6 in 22 kinds of representative covalent-and metal-organic frameworks. Results indicate that COF-6 is a promising candidate for the SF6 adsorption at low pressure P<20 kPa because of its small pore size, while MOF-180 and PAF-302 are excellent candidates at high pressure P=2×103 kPa due to their large Brunauer-Emmett-Teller specific surface area (BET-SSA) and pore volumes. For the two cases of the power industry (XSF6=0.1) and the semiconductor industry (XSF6=0.002) environments, COF-6 and ZIF-8 are fairly promising candidates for selective adsorption of SF6 from the SF6/N2 mixtures, because they not only present the high selectivity, but also the large adsorption capacity at ambient environment, which can be considered as potential adsorbents for selective adsorption of SF6 at ambient conditions.

关键词: Sulfur hexafluoride (SF6), Metal-organic frameworks, Molecular simulation, Covalent-organic frameworks, Adsorption, Separation

Abstract: Sulfur hexafluoride (SF6) is an extremely severe greenhouse gas. It is an urgently important mission to find excellent candidates for selective adsorption of SF6, in order to reduce the emission of SF6 facilities. Here, we adopt the molecular simulation method to systematically explore the selective adsorption of SF6 in 22 kinds of representative covalent-and metal-organic frameworks. Results indicate that COF-6 is a promising candidate for the SF6 adsorption at low pressure P<20 kPa because of its small pore size, while MOF-180 and PAF-302 are excellent candidates at high pressure P=2×103 kPa due to their large Brunauer-Emmett-Teller specific surface area (BET-SSA) and pore volumes. For the two cases of the power industry (XSF6=0.1) and the semiconductor industry (XSF6=0.002) environments, COF-6 and ZIF-8 are fairly promising candidates for selective adsorption of SF6 from the SF6/N2 mixtures, because they not only present the high selectivity, but also the large adsorption capacity at ambient environment, which can be considered as potential adsorbents for selective adsorption of SF6 at ambient conditions.

Key words: Sulfur hexafluoride (SF6), Metal-organic frameworks, Molecular simulation, Covalent-organic frameworks, Adsorption, Separation