Citation: Junhua Wang, Xin Lian, Xichuan Cao, Qiao Zhao, Baiyan Li, Xian-He Bu. Dual polarization strategy to enhance CH₄ uptake in covalent organic frameworks for coal-bed methane purification[J]. Chinese Chemical Letters, ;2024, 35(8): 109180. doi: 10.1016/j.cclet.2023.109180 shu

Dual polarization strategy to enhance CH₄ uptake in covalent organic frameworks for coal-bed methane purification

Junhua Wang ^{b, c} ,
Xin Lian ^c ,
Xichuan Cao ^{a, b, *,} ,
Qiao Zhao ^{c, **,} ,
Baiyan Li ^{c, **,} ,
Xian-He Bu ^c

a.
School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
b.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
c.
School of Materials Science and Engineering, National Institute for Advanced Materials, TKL of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China

^**

xichuancao@cumt.edu.cn

qiaozhao@nankai.edu.cn

libaiyan@nankai.edu.cn

Received Date: 2 September 2023
Revised Date: 19 September 2023
Accepted Date: 6 October 2023
Available Online: 10 October 2023

Figures(6)

The purification of low-grade coal-bed methane is extremely important, but challenging, due to the very similar physical properties of CH₄ and N₂. Herein, we proposed a dual polarization strategy by employing triazine and polyfluoride sites to construct polar pores in COF materials, achieving the efficient separation of CH₄ from N₂. As expected, the dual polarized F-CTF-1 and F-CTF-2 exhibit higher CH₄ adsorption capacity and CH₄/N₂ selectivity than CTF-1 and CTF-2, respectively. Especially, the CH₄ uptake capacity and CH₄/N₂ selectivity of F-CTF-2 is 1.76 and 1.42 times than that of CTF-2. This work not only developed promising COF materials for CH₄/N₂ separation, but also provided important guidance for the separation of other adsorbates with similar properties.
- Dual polarization strategy,
- Covalent organic frameworks (COFs),
- Coal-bed methane purification,
- Chemical/thermal stability,
- Cycling stability
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Dual polarization strategy to enhance CH4 uptake in covalent organic frameworks for coal-bed methane purification

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通讯作者: 陈斌, bchen63@163.com

Dual polarization strategy to enhance CH₄ uptake in covalent organic frameworks for coal-bed methane purification