One-step ethylene production from a four-component gas mixture by a single physisorbent

One-step adsorptive purification of ethylene (C 2 H 4 ) from four-component gas mixtures comprising acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), ethane (C 2 H 6 ) and carbon dioxide (CO 2 ) is an unmet challenge in the area of commodity purification. Herein, we report that the ultramicroporous sorbent...

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Bibliographic Details
Published in:Nature communications 2021-11, Vol.12 (1), p.6507-6507, Article 6507
Main Authors: Cao, Jian-Wei, Mukherjee, Soumya, Pham, Tony, Wang, Yu, Wang, Teng, Zhang, Tao, Jiang, Xue, Tang, Hui-Juan, Forrest, Katherine A., Space, Brian, Zaworotko, Michael J., Chen, Kai-Jie
Format: Article
Language:English
Subjects:
119/118
639/301/299/1013
639/638/298/921
Acetylene
Adsorptivity
Binding sites
Carbon dioxide
Diphenyl ether
Ethane
Ethylene
Gas mixtures
Humanities and Social Sciences
Metal-organic frameworks
multidisciplinary
Polymers
Purification
Science
Science (multidisciplinary)
Selective adsorption
Selective binding
Sorbents
Zinc
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Summary:One-step adsorptive purification of ethylene (C 2 H 4 ) from four-component gas mixtures comprising acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), ethane (C 2 H 6 ) and carbon dioxide (CO 2 ) is an unmet challenge in the area of commodity purification. Herein, we report that the ultramicroporous sorbent Zn-atz-oba (H 2 oba = 4,4-dicarboxyl diphenyl ether; Hatz = 3-amino-1,2,4-triazole) enables selective adsorption of C 2 H 2 , C 2 H 6 and CO 2 over C 2 H 4 thanks to the binding sites that lie in its undulating pores. Molecular simulations provide insight into the binding sites in Zn-atz-oba that are responsible for coadsorption of C 2 H 2 , C 2 H 6 and CO 2 over C 2 H 4 . Dynamic breakthrough experiments demonstrate that the selective binding exhibited by Zn-atz-oba can produce polymer-grade purity (>99.95%) C 2 H 4 from binary (1:1 for C 2 H 4 /C 2 H 6 ), ternary (1:1:1 for C 2 H 2 /C 2 H 4 /C 2 H 6 ) and quaternary (1:1:1:1 for C 2 H 2 /C 2 H 4 /C 2 H 6 /CO 2 ) gas mixtures in a single step. The purification of ethylene is an industrially relevant process. Here, the authors report the one-step separation of ethylene from quaternary gas mixtures of hydrocarbons and CO 2 using a single metal–organic framework-based physisorbent.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-26473-8