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<p>Due to the structural similarity between C<sub>2</sub>H<sub>2</sub> and C<sub>2</sub>H<sub>4</sub>, the efficient separation remains a challenge for achieving high-purity ethylene in industrial processes. Ultramicroporous metal–organic frameworks (MOFs) with one-dimensional channels are promising C<sub>2</sub>H<sub>2</sub> adsorbents due to their multiple binding sites, including electronegative atoms positioned near electro-deficient hydrocarbon regions. Al-based MOFs are evaluated as a good considering scale-up, and structural stability. Here, MIL-120(Al) is introduced as an excellent C<sub>2</sub>H<sub>2</sub> adsorbent not only for C<sub>2</sub>H<sub>4</sub> with an IAST selectivity value of 4.0 but also for high C<sub>2</sub>H<sub>2</sub> uptake (3.41&#xa0;mmol&#xa0;g<sup>−1</sup>). MIL-120(Al) is one of the top-ranked high C<sub>2</sub>H<sub>2</sub> storage densities among MOFs.</p> Graphical abstract <p></p>

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Separation of acetylene from acetylene/ethylene mixtures by ultramicroporous MIL-120(Al) with a high storage density

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Maftun Salimov,
  • Yu Kyeong Kim,
  • Ji Woong Yoon,
  • Kyung Ho Cho,
  • Donghui Jo,
  • U.-Hwang Lee,
  • Su-Kyung Lee

摘要

Due to the structural similarity between C2H2 and C2H4, the efficient separation remains a challenge for achieving high-purity ethylene in industrial processes. Ultramicroporous metal–organic frameworks (MOFs) with one-dimensional channels are promising C2H2 adsorbents due to their multiple binding sites, including electronegative atoms positioned near electro-deficient hydrocarbon regions. Al-based MOFs are evaluated as a good considering scale-up, and structural stability. Here, MIL-120(Al) is introduced as an excellent C2H2 adsorbent not only for C2H4 with an IAST selectivity value of 4.0 but also for high C2H2 uptake (3.41 mmol g−1). MIL-120(Al) is one of the top-ranked high C2H2 storage densities among MOFs.

Graphical abstract