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Adsorptive Separation of Acetylene from Ethylene in Isostructural Gallate‐Based Metal–Organic Frameworks
Author(s) -
Wang Jiawei,
Li Liangying,
Guo Lidong,
Zhao Yingcai,
Xie Danyan,
Zhang Zhiguo,
Yang Qiwei,
Yang Yiwen,
Bao Zongbi,
Ren Qilong
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201903952
Subject(s) - isostructural , gallate , acetylene , ethylene , adsorption , materials science , metal , metal organic framework , chemistry , inorganic chemistry , chemical engineering , crystallography , organic chemistry , nuclear chemistry , crystal structure , catalysis , engineering
The separation of acetylene from ethylene is of paramount importance in the purification of chemical feedstocks for industrial manufacturing. Herein, an isostructural series of gallate‐based metal–organic frameworks (MOFs), M‐gallate (M=Ni, Mg, Co), featuring three‐dimensionally interconnected zigzag channels, the aperture size of which can be finely tuned within 0.3 Å by metal replacement. Controlling the aperture size of M‐gallate materials slightly from 3.69 down to 3.47 Å could result in a dramatic enhancement of C 2 H 2 /C 2 H 4 separation performance. As the smallest radius among the studied metal ions, Ni‐gallate exhibits the best C 2 H 2 /C 2 H 4 adsorption separation performance owing to the strongest confinement effect, ranking after the state‐of‐the‐art UTSA‐200a with a C 2 H 4 productivity of 85.6 mol L −1 from 1:99 C 2 H 2 /C 2 H 4 mixture. The isostructural gallate‐based MOFs, readily synthesized from inexpensive gallic acid, are demonstrated to be a new top‐performing porous material for highly efficient adsorption of C 2 H 2 from C 2 H 4 .