Molecular-scale hybrid membranes prepared with benzimidazole based monomers for high performance H2 purification

For high performance H2 purification, molecular-scale hybrid membranes with benzimidazole rings and amide linkages were designed by one-step interfacial polymerization. The key is the employment of benzimidazole based monomers. The membrane structures were sufficiently characterized and separation c...

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Vydáno v:Journal of membrane science Ročník 721; s. 123789
Hlavní autoři: Luan, Liping, Shi, Puxin, Guo, Zhecheng, Cong, Shenzhen, Tang, Shenyi, Zhang, Bo, Wang, Zhi, Liu, Xinlei
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.04.2025
Témata:
benzimidazole
Benzimidazole monomers
H2/CO2 separation
Molecular-scale hybrid membranes
polymerization
polymers
Zr-oxo clusters
Molecular-scale hybrid membranes
Benzimidazole monomers
H2/CO2 separation
Zr-oxo clusters
ISSN:0376-7388
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Shrnutí:For high performance H2 purification, molecular-scale hybrid membranes with benzimidazole rings and amide linkages were designed by one-step interfacial polymerization. The key is the employment of benzimidazole based monomers. The membrane structures were sufficiently characterized and separation capability of the membranes were feasibly regulated by preparation parameters and feed conditions. The optimized membrane displayed a stable permeance for H2 (around 500 GPU) with a H2/CO2 selectivity around 50 at 523 K and 2 bar, surpassing the upper bound of polymer membranes. [Display omitted] •Benzimidazole based monomers and Zr-oxo clusters are employed to prepare molecular-scale hybrid membranes.•The membranes fabricated by one-step interfacial polymerization contain benzimidazole rings and amide linkages.•The performance surpasses the upper bounds of polymer membranes for H2/CO2 separation.
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ISSN:0376-7388
DOI:10.1016/j.memsci.2025.123789