Volume 9, Issue 4 2401248
Research Article

Twinned Metal–Organic Framework Nanoplates for Hydrocarbon Separation Membranes

Jongbum Kim

Jongbum Kim

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Minsu Kim

Minsu Kim

Department of Chemical and Biomolecular Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 03722 Republic of Korea

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Seungho Yu

Seungho Yu

Department of Chemical Engineering, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029 Republic of Korea

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Jihee Yu

Jihee Yu

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Chanjong Yu

Chanjong Yu

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Taehwan Kim

Taehwan Kim

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Nahyeon Lee

Nahyeon Lee

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Yun Ho Ahn

Yun Ho Ahn

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

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Yun Ho Kim

Yun Ho Kim

Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114 Republic of Korea

Advanced Materials and Chemical Engineering, KRICT School, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34114 Republic of Korea

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Sungmi Yoo

Sungmi Yoo

Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114 Republic of Korea

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Ki Chul Kim

Ki Chul Kim

Department of Chemical Engineering, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029 Republic of Korea

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Dae Woo Kim

Corresponding Author

Dae Woo Kim

Department of Chemical and Biomolecular Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 03722 Republic of Korea

E-mail: [email protected]; [email protected]

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Kiwon Eum

Corresponding Author

Kiwon Eum

Department of Chemical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul, 06978 Republic of Korea

E-mail: [email protected]; [email protected]

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First published: 09 November 2024
Citations: 1

Abstract

Filler morphology control is critical for enhancing the gas separation performance of mixed matrix membranes (MMMs). A vertical transport channel using the crystal twinning phenomenon is designed on the zeolitic imidazolate framework (ZIF) nanoplate. Twinned ZIF-8 (TZIF-8) nanoplate is prepared by controlling the shape of ZIF-L from nanosheet to twinned flake, followed by conversion into the ZIF-8 phase. With the addition of TZIF-8 in 6FDA-DAM polymer, propylene/propane selectivity is dramatically enhanced, showing propylene permeability of 40 Barrer and propylene/propane selectivity of 82. The separation performance surpasses the performance of MMMs reported so far, and the selectivity is comparable to that of polycrystalline ZIF-8 membranes. A transport mechanism study using mathematical models implies that the percolated twin fillers create rapid and selective gas channels for desired molecules and substantial tortuous pathways for undesired molecules.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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