Honeycomb-like Hofmann-type metal-organic framework membranes for C2H2/CO2 and H2/CO2 separation

Novel membrane materials are to be explored to meet the increasing demands on challenging separations of gas pairs, such as C2H2/CO2 and H2/CO2. Metal-organic frameworks (MOFs) are nominated due to their customizable structures. Here, honeycomb-like Hofmann-type MOF ZJU-74a membranes are fabricated...

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Bibliographic Details
Published inJournal of membrane science Vol. 669; p. 121282
Main Authors Liu, Hefang, Cong, Shenzhen, Yan, Xueru, Wang, Xiaoyan, Gao, Aotong, Wang, Zhi, Liu, Xinlei
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.03.2023
Subjects
C2H2
Gas separation
Hofmann-type metal-organic frameworks
Membranes
Membranes
Gas separation
H2
Hofmann-type metal-organic frameworks
C2H2
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Summary:Novel membrane materials are to be explored to meet the increasing demands on challenging separations of gas pairs, such as C2H2/CO2 and H2/CO2. Metal-organic frameworks (MOFs) are nominated due to their customizable structures. Here, honeycomb-like Hofmann-type MOF ZJU-74a membranes are fabricated via controllable solvothermal synthesis. The formation mechanism and functions of this unique spatial membrane structure are clarified. The membranes provide a possible separation of C2H2 from CO2 on the basis of preferential adsorption of the former. A high H2/CO2 separation factor, up to 100, is reached relying on molecular sieving mechanism. In addition, the membrane durability, a crucial parameter for real application, is outstanding. [Display omitted] •Hofmann-type MOF membranes are developed.•The membranes feature spatial honeycomb-like structures.•The membranes provide a possible separation of C2H2 from CO2.•The H2/CO2 selectivity reaches 100.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2022.121282