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Selective sorting of hexane isomers by anion-functionalized metal-organic frameworks with optimal energy regulation

Author

Listed:
  • Qingju Wang

    (Zhejiang University
    Zhejiang University)

  • Lifeng Yang

    (Zhejiang University)

  • Tian Ke

    (Zhejiang University)

  • Jianbo Hu

    (Zhejiang University)

  • Xian Suo

    (Zhejiang University)

  • Xili Cui

    (Zhejiang University
    Zhejiang University
    Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering)

  • Huabin Xing

    (Zhejiang University
    Zhejiang University)

Abstract

Extensive efforts have been made to improve the separation selectivity of hydrocarbon isomers with nearly distinguishable boiling points; however, how to balance the high regeneration energy consumption remains a daunting challenge. Here we describe the efficient separation of hexane isomers by constructing and exploiting the rotational freedom of organic linkers and inorganic SnF62− anions within adaptive frameworks, and reveal the nature of flexible host-guest interactions to maximize the gas-framework interactions while achieving potential energy storage. This approach enables the discrimination of hexane isomers according to the degree of branching along with high capacity and record mono-/di-branched selectivity (6.97), di-branched isomers selectivity (22.16), and upgrades the gasoline to a maximum RON (Research Octane Number) of 105. Benefitting from the energy regulation of the flexible pore space, the material can be easily regenerated only through a simple vacuum treatment for 15 minutes at 25 °C with no temperature fluctuation, saving almost 45% energy compared to the commercialized zeolite 5 A. This approach could potentially revolutionize the whole scenario of alkane isomer separation processes.

Suggested Citation

  • Qingju Wang & Lifeng Yang & Tian Ke & Jianbo Hu & Xian Suo & Xili Cui & Huabin Xing, 2024. "Selective sorting of hexane isomers by anion-functionalized metal-organic frameworks with optimal energy regulation," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46738-2
    DOI: 10.1038/s41467-024-46738-2
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    References listed on IDEAS

    as
    1. David S. Sholl & Ryan P. Lively, 2016. "Seven chemical separations to change the world," Nature, Nature, vol. 532(7600), pages 435-437, April.
    2. Xili Cui & Zheng Niu & Chuan Shan & Lifeng Yang & Jianbo Hu & Qingju Wang & Pui Ching Lan & Yijian Li & Lukasz Wojtas & Shengqian Ma & Huabin Xing, 2020. "Efficient separation of xylene isomers by a guest-responsive metal–organic framework with rotational anionic sites," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    3. Hao Wang & Xinglong Dong & Junzhong Lin & Simon J. Teat & Stephanie Jensen & Jeremy Cure & Eugeny V. Alexandrov & Qibin Xia & Kui Tan & Qining Wang & David H. Olson & Davide M. Proserpio & Yves J. Cha, 2018. "Topologically guided tuning of Zr-MOF pore structures for highly selective separation of C6 alkane isomers," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
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    5. Qingju Wang & Jianbo Hu & Lifeng Yang & Zhaoqiang Zhang & Tian Ke & Xili Cui & Huabin Xing, 2022. "One-step removal of alkynes and propadiene from cracking gases using a multi-functional molecular separator," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
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