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Tuning Gate‐Opening of a Flexible Metal–Organic Framework for Ternary Gas Sieving Separation
Author(s) -
Dong Qiubing,
Zhang Xin,
Liu Shuang,
Lin RuiBiao,
Guo Yanan,
Ma Yunsheng,
Yonezu Akira,
Krishna Rajamani,
Liu Gongpin,
Duan Jingui,
Matsuda Ryotaro,
Jin Wanqin,
Chen Banglin
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202011802
Subject(s) - ternary operation , acetylene , polymer , carbon dioxide , adsorption , chemical engineering , ethylene , materials science , gas separation , metal , chemistry , analytical chemistry (journal) , nanotechnology , chromatography , organic chemistry , catalysis , membrane , computer science , biochemistry , engineering , programming language
In comparison with the fast development of binary mixture separations, ternary mixture separations are significantly more difficult and have rarely been realized by a single material. Herein, a new strategy of tuning the gate‐opening pressure of flexible MOFs is developed to tackle such a challenge. As demonstrated by a flexible framework NTU‐65, the gate‐opening pressure of ethylene (C 2 H 4 ), acetylene (C 2 H 2 ), and carbon dioxide (CO 2 ) can be regulated by temperature. Therefore, efficient sieving separation of this ternary mixture was realized. Under optimized temperature, NTU‐65 adsorbed a large amount of C 2 H 2 and CO 2 through gate‐opening and only negligible amount of C 2 H 4 . Breakthrough experiments demonstrated that this material can simultaneously capture C 2 H 2 and CO 2 , yielding polymer‐grade (>99.99 %) C 2 H 4 from single breakthrough separation.
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