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Flexible Metal–Organic Frameworks with Discriminatory Gate‐Opening Effect for the Separation of Acetylene from Ethylene/Acetylene Mixtures
Author(s) -
Li Libo,
Krishna Rajamani,
Wang Yong,
Wang Xiaoqing,
Yang Jiangfeng,
Li Jinping
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600182
Subject(s) - acetylene , adsorption , ethylene , chemistry , metal organic framework , chemical engineering , metal , photochemistry , organic chemistry , catalysis , engineering
Adsorptive separation of acetylene from ethylene/acetylene mixtures is a technologically very important and highly challenging task. In this work, we describe two flexible metal–organic frameworks (MOFs), ELM‐11 and ELM‐13, that display adsorbate discriminatory gate effects. The two MOFs exhibit gate‐opening‐type adsorption properties for C 2 H 2 but not for C 2 H 4 , leading to a highly selective adsorption of acetylene over ethylene at 273–298 K. The potential of the flexible MOFs for the separation is established by combining measurements of adsorption isotherms, ideal adsorbed solution theory (IAST) calculations of the adsorption equilibrium of the mixture, and transient breakthrough experiments. The results suggest the potential of both flexible MOFs for the industrial removal of acetylene from ethylene/acetylene mixtures through the energy‐efficient adsorption separation process.