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Thermodynamic−Kinetic Synergistic Separation of CH4/N2 on A Robust Aluminum-Based Metal−Organic Framework
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  • Feifei Zhang,
  • Hua Shang,
  • Bolun Zhai,
  • Xiaoming Li,
  • Yingying Zhang,
  • Xiaoqing Wang,
  • jinping Li,
  • Jiangfeng Yang
Feifei Zhang
Taiyuan University of Technology

Corresponding Author:zhangfeifei0096@link.tyut.edu.cn

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Hua Shang
Taiyuan University of Technology
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Bolun Zhai
Taiyuan University of Technology
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Xiaoming Li
Taiyuan University of Technology
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Yingying Zhang
Taiyuan University of Technology
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Xiaoqing Wang
Taiyuan University of Technology
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jinping Li
Taiyuan University of Technology
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Jiangfeng Yang
Taiyuan University of Technology
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Abstract

A robust aluminum-based metal-organic framework (Al-MOF) MIL-120Al with 1D rhombic ultra-microporous was reported. The non-polar porous walls composed of para-benzene rings with a comparable pore size to the kinetic diameter of methane allow it to exhibit a novel thermodynamic-kinetic synergistic separation of CH4/N2 mixtures. The CH4 adsorption capacity was as high as 33.7 cm3/g (298 K, 1 bar), which is the highest uptake value among the Al-MOFs reported to date. The diffusion rates of CH4 were faster than N2 in this structure as confirmed by time-dependent kinetic adsorption profiles. Breakthrough experiments confirm that this MOF can completely separate the CH4/N2 mixture and the separation performance is not affected in the presence of H2O. Theoretical calculations reveal that pore centers with more energetically-favorable binding sites for CH4 than N2. The results of pressure swing adsorption (PSA) simulations indicate that MIL-120Al is a potential candidate for selective capture coal-mine methane.
02 Nov 2022Submitted to AIChE Journal
03 Nov 2022Submission Checks Completed
03 Nov 2022Assigned to Editor
03 Nov 2022Review(s) Completed, Editorial Evaluation Pending
13 Nov 2022Reviewer(s) Assigned
05 Jan 2023Editorial Decision: Revise Major
14 Jan 20231st Revision Received
14 Jan 2023Submission Checks Completed
14 Jan 2023Assigned to Editor
14 Jan 2023Review(s) Completed, Editorial Evaluation Pending
21 Jan 2023Reviewer(s) Assigned
14 Feb 2023Editorial Decision: Accept