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High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

Author

Listed:
  • Shotaro Hiraide

    (Kyoto University, Nishikyo)

  • Yuta Sakanaka

    (Kyoto University, Nishikyo)

  • Hiroshi Kajiro

    (Nippon Steel Corporation)

  • Shogo Kawaguchi

    (Japan Synchrotron Radiation Research Institute (JASRI))

  • Minoru T. Miyahara

    (Kyoto University, Nishikyo)

  • Hideki Tanaka

    (Research Initiative for Supra-Materials (RISM), Shinshu University)

Abstract

Establishing new energy-saving systems for gas separation using porous materials is indispensable for ensuring a sustainable future. Herein, we show that ELM-11 ([Cu(BF4)2(4,4′-bipyridine)2]n), a member of flexible metal–organic frameworks (MOFs), exhibits rapid responsiveness to a gas feed and an ‘intrinsic thermal management’ capability originating from a structural deformation upon gas adsorption (gate-opening). These two characteristics are suitable for developing a pressure vacuum swing adsorption (PVSA) system with rapid operations. A combined experimental and theoretical study reveals that ELM-11 enables the high-throughput separation of CO2 from a CO2/CH4 gas mixture through adiabatic operations, which are extreme conditions in rapid pressure vacuum swing adsorption. We also propose an operational solution to the ‘slipping-off’ problem, which is that the flexible MOFs cannot adsorb target molecules when the partial pressure of the target gas decreases below the gate-opening pressure. Furthermore, the superiority of our proposed system over conventional systems is demonstrated.

Suggested Citation

  • Shotaro Hiraide & Yuta Sakanaka & Hiroshi Kajiro & Shogo Kawaguchi & Minoru T. Miyahara & Hideki Tanaka, 2020. "High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities," Nature Communications, Nature, vol. 11(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17625-3
    DOI: 10.1038/s41467-020-17625-3
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