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Rational Tuning of Zirconium Metal–Organic Framework Membranes for Hydrogen Purification
Author(s) -
Ghalei Behnam,
Wakimoto Kazuki,
Wu Chih Yi,
Isfahani Ali Pournaghshband,
Yamamoto Takuma,
Sakurai Kento,
Higuchi Masakazu,
Chang Bor Kae,
Kitagawa Susumu,
Sivaniah Easan
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911359
Subject(s) - membrane , zirconium , metal organic framework , gas separation , selectivity , hydrogen , ligand (biochemistry) , materials science , chemical engineering , metal , thermal diffusivity , inorganic chemistry , chemistry , organic chemistry , catalysis , biochemistry , physics , receptor , adsorption , quantum mechanics , engineering
The effect of organic ligands on the separation performance of Zr based metal–organic framework (Zr‐MOF) membranes was investigated. A series of Zr‐MOF membranes with different ligand chemistry and functionality were synthesized by an in situ solvothermal method and a coordination modulation technique. The thin supported MOF layers (ca. 1 μm) showed the crystallographic orientation and pore structure of original MOF structures. The MOF membranes show excellent selectivity towards hydrogen owing to the molecular sieving effect when the bulkier linkers were used. The molecular simulation confirmed that the constricted pore apertures of the Zr‐MOFs which were formed by the additional benzene rings lead to the decrease in the diffusivity of larger penetrants while hydrogen was not remarkably affected. The gas mixture separation factors of the MOF membranes reached to H 2 /CO 2 =26, H 2 /N 2 =13, H 2 /CH 4 =11.