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. 2023 Jul 10;62(28):e202304535.
doi: 10.1002/anie.202304535. Epub 2023 Jun 2.

Metal-Organic Framework Crystal-Glass Composite Membranes with Preferential Permeation of Ethane

De Ao  1   2 , Zibo Yang  1   3 , Zhihua Qiao  1 , Yuxiu Sun  1 , Zhengqing Zhang  1 , Michael D Guiver  4   5 , Chongli Zhong  1
Affiliations

Metal-Organic Framework Crystal-Glass Composite Membranes with Preferential Permeation of Ethane

De Ao et al. Angew Chem Int Ed Engl. .

Abstract

Metal-organic framework (MOF) glass is an easy to process and self-supported amorphous material that is suitable for fabricating gas separation membranes. However, MOF glasses, such as ZIF-62 and ZIF-4 have low porosity, which makes it difficult to obtain membranes with high permeance. Here, a self-supported MOF crystal-glass composite (CGC) membrane was prepared by melt quenching a mixture of ZIF-62 as the membrane matrix and ZIF-8 as the filler. The conversion of ZIF-62 from crystal to glass and the simultaneous partial melting of ZIF-8 facilitated by the melt state of ZIF-62 make the CGC membrane monolithic, eliminating non-selective grain boundaries and improving selectivity. The thickness of CGC membrane can be adjusted to fabricate a membrane without the need of a support substrate. CGC membranes exhibit a C2 H6 permeance of 41 569 gas permeation units (GPU) and a C2 H6 /C2 H4 selectivity of 7.16. The CGC membrane has abundant pores from the glassy state of ZIF-62 and the crystalline ZIF-8, which enables high gas permeance. ZIF-8 has preferential adsorption for C2 H6 and promotes C2 H6 transport in the membrane, and thus the GCG membrane exhibits ultrahigh C2 H6 permeance and good C2 H6 /C2 H4 selectivity.

Keywords: Crystal-Glass Composites; Gas Separation; Membranes; Metal-Organic Frameworks; Olefin/Paraffin Separation.

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References

    1. None
    1. C. X. Chen, Z. W. Wei, T. Pham, P. C. Lan, L. Zhang, K. A. Forrest, S. Chen, A. M. Al-Enizi, A. Nafady, C. Y. Su, S. Ma, Angew. Chem. Int. Ed. 2021, 60, 9680-9685;
    1. L. Li, R.-B. Lin, R. Krishna, H. Li, S. Xiang, H. Wu, J. Li, W. Zhou, B. Chen, Science 2018, 362, 443-446;
    1. R.-B. Lin, L. Li, H.-L. Zhou, H. Wu, C. He, S. Li, R. Krishna, J. Li, W. Zhou, B. Chen, Nat. Mater. 2018, 17, 1128-1133.
    1. F. Jin, E. Lin, T. Wang, S. Geng, T. Wang, W. Liu, F. Xiong, Z. Wang, Y. Chen, P. Cheng, Z. Zhang, J. Am. Chem. Soc. 2022, 144, 5643-5652.

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