Citation: Shan-Qing Yang, Lu-Lu Wang, Rajamani Krishna, Bo Xing, Lei Zhou, Fei-Yang Zhang, Qiang Zhang, Yi-Long Li, Chao-Sheng Bao, Tong-Liang Hu. Efficient C₃H₆/C₃H₈ separation within a bifunctional ultramicroporous metal-organic framework with high purity and record packing density[J]. Chinese Chemical Letters, ;2025, 36(12): 110556. doi: 10.1016/j.cclet.2024.110556 shu

Efficient C₃H₆/C₃H₈ separation within a bifunctional ultramicroporous metal-organic framework with high purity and record packing density

a.
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
b.
Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam 1098 XH, the Netherlands
c.
College of Chemistry and Materials Science, Hebei University, Baoding 071002, China

tlhu@nankai.edu.cn

Received Date: 7 September 2024
Revised Date: 15 October 2024
Accepted Date: 16 October 2024
Available Online: 16 October 2024

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The propylene/propane (C₃H₆/C₃H₈) separation is particularly challenging due to their highly similar physical properties, but of industrial importance. Herein, we report a bifunctional ultramicroporous metal-organic framework (Co-aip-pyz) with customized pore environment and selective binding sites for the challenging C₃H₆/C₃H₈ separation. Co-aip-pyz exhibits a good C₃H₆ uptake with an ultrahigh C₃H₆ packing density (931 g/L), as well as possesses a remarkable C₃H₆/C₃H₈ uptake ratio with 911% and distinguished C₃H₆/C₃H₈ selectivity (>10⁴) at 298 K and 1.0 bar. Furthermore, Co-aip-pyz possesses a record high C₃H₆ packing density with 859 g/L at 313 K and 1.0 bar, which is unprecedented in the C₃H₆/C₃H₈ separation. Its high performance for the C₃H₆/C₃H₈ separation has been further confirmed by breakthrough experiments and molecular simulations. Combined with good stability, facilely synthesized procedure by low-cost precursors, record-high C₃H₆ packing density, as well as good C₃H₆/C₃H₈ separation performance, it highlights Co-aip-pyz as a benchmark adsorbent to address daunting challenge for industrial C₃H₆/C₃H₈ separation. This work provides valuable insights into constructing top-performing MOF materials for addressing the industrial separation challenges.
- Metal-organic frameworks,
- Gas adsorption and separation,
- C₃H₆ purification,
- C₃H₆/C₃H₈ separation,
- C₃H₆ packing density
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Efficient C₃H₆/C₃H₈ separation within a bifunctional ultramicroporous metal-organic framework with high purity and record packing density