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Interaction-selective molecular sieving adsorbent for direct separation of ethylene from senary C2-C4 olefin/paraffin mixture

Author

Listed:
  • Yong Peng

    (Nanchang University)

  • Hanting Xiong

    (Nanchang University)

  • Peixin Zhang

    (Nanchang University)

  • Zhiwei Zhao

    (Nanchang University)

  • Xing Liu

    (Nanchang University)

  • Shihui Tang

    (Nanchang University)

  • Yuan Liu

    (Nanchang University)

  • Zhenliang Zhu

    (Nanchang University)

  • Weizhen Zhou

    (Nanchang University)

  • Zhenning Deng

    (Nanchang University)

  • Junhui Liu

    (Nanchang University)

  • Yao Zhong

    (Nanchang University)

  • Zeliang Wu

    (Nanchang University)

  • Jingwen Chen

    (Nanchang University)

  • Zhenyu Zhou

    (Nanchang University)

  • Shixia Chen

    (Nanchang University)

  • Shuguang Deng

    (Arizona State University)

  • Jun Wang

    (Nanchang University)

Abstract

Olefin/paraffin separations are among the most energy-intensive processes in the petrochemical industry, with ethylene being the most widely consumed chemical feedstock. Adsorptive separation utilizing molecular sieving adsorbents can optimize energy efficiency, whereas the size-exclusive mechanism alone cannot achieve multiple olefin/paraffin sieving in a single adsorbent. Herein, an unprecedented sieving adsorbent, BFFOUR-Cu-dpds (BFFOUR = BF4-, dpds = 4,4’-bipyridinedisulfide), is reported for simultaneous sieving of C2-C4 olefins from their corresponding paraffins. The interlayer spaces can be selectively opened through stronger guest-host interactions induced by unsaturated C = C bonds in olefins, as opposed to saturated paraffins. In equimolar six-component breakthrough experiments (C2H4/C2H6/C3H6/C3H8/n-C4H8/n-C4H10), BFFOUR-Cu-dpds can simultaneously divide olefins from paraffins in the first column, while high-purity ethylene ( > 99.99%) can be directly obtained through the subsequent column using granular porous carbons. Moreover, gas-loaded single-crystal analysis, in-situ infrared spectroscopy measurements, and computational simulations demonstrate the accommodation patterns, interaction bonds, and energy pathways for olefin/paraffin separations.

Suggested Citation

  • Yong Peng & Hanting Xiong & Peixin Zhang & Zhiwei Zhao & Xing Liu & Shihui Tang & Yuan Liu & Zhenliang Zhu & Weizhen Zhou & Zhenning Deng & Junhui Liu & Yao Zhong & Zeliang Wu & Jingwen Chen & Zhenyu , 2024. "Interaction-selective molecular sieving adsorbent for direct separation of ethylene from senary C2-C4 olefin/paraffin mixture," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45004-9
    DOI: 10.1038/s41467-024-45004-9
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