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Molecular sieving of iso-butene from C4 olefins with simultaneous high 1,3-butadiene and n-butene uptakes

Author

Listed:
  • Junhui Liu

    (Nanchang University)

  • Hanting Xiong

    (Nanchang University)

  • Hua Shuai

    (Nanchang University)

  • Xing Liu

    (Nanchang University)

  • Yong Peng

    (Nanchang University)

  • Lingmin Wang

    (Nanchang University)

  • Pengxiang Wang

    (Nanchang University)

  • Zhiwei Zhao

    (Nanchang University)

  • Zhenning Deng

    (Nanchang University)

  • Zhenyu Zhou

    (Nanchang University)

  • Jingwen Chen

    (Nanchang University)

  • Shixia Chen

    (Nanchang University)

  • Zheling Zeng

    (Nanchang University)

  • Shuguang Deng

    (Arizona State University)

  • Jun Wang

    (Nanchang University)

Abstract

Iso-butene (iso-C4H8) is an important raw material in chemical industry, whereas its efficient separation remains challenging due to similar molecular properties of C4 olefins. The ideal adsorbent should possess simultaneous high uptakes for 1,3-butadiene (C4H6) and n-butene (n-C4H8) counterparts, endowing high efficiency for iso-C4H8 separation in adsorption columns. Herein, a sulfate-pillared adsorbent, SOFOUR-DPDS-Ni (DPDS = 4,4′-dipyridyldisulfide), is reported for the efficient iso-C4H8 separation from binary and ternary C4 olefin mixtures. The rigidity in pore sizes and shapes of SOFOUR-DPDS-Ni exerts the molecular sieving of iso-C4H8, while exhibiting high C4H6 and n-C4H8 uptakes. The benchmark Henry’s selectivity for C4H6/iso-C4H8 (2321.8) and n-C4H8/iso-C4H8 (233.5) outperforms most reported adsorbents. Computational simulations reveal the strong interactions for C4H6 and n-C4H8. Furthermore, dynamic breakthrough experiments demonstrate the direct production of high-purity iso-C4H8 (>99.9%) from C4H6/iso-C4H8 (50/50, v/v), n-C4H8/iso-C4H8 (50/50, v/v), and C4H6/n-C4H8/iso-C4H8 (50/15/35, v/v/v) gas-mixtures.

Suggested Citation

  • Junhui Liu & Hanting Xiong & Hua Shuai & Xing Liu & Yong Peng & Lingmin Wang & Pengxiang Wang & Zhiwei Zhao & Zhenning Deng & Zhenyu Zhou & Jingwen Chen & Shixia Chen & Zheling Zeng & Shuguang Deng & , 2024. "Molecular sieving of iso-butene from C4 olefins with simultaneous high 1,3-butadiene and n-butene uptakes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46607-y
    DOI: 10.1038/s41467-024-46607-y
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    References listed on IDEAS

    as
    1. Jun Wang & Yan Zhang & Yun Su & Xing Liu & Peixin Zhang & Rui-Biao Lin & Shixia Chen & Qiang Deng & Zheling Zeng & Shuguang Deng & Banglin Chen, 2022. "Fine pore engineering in a series of isoreticular metal-organic frameworks for efficient C2H2/CO2 separation," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
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