Issue 13, 2024

Construction of a novel nickel-based MOF with accessible oxygen sites for efficient CH4/N2 separation

Abstract

Enriching coal-bed methane to provide pure methane is promising and attractive. However, it is challenging due to the similar properties of CH4 and N2. In this work, a novel nickel-based metal–organic framework (named TUTJ-201Ni) with a high density of accessible oxygen sites was synthesized for CH4/N2 separation. From the structure, oxygen atoms from ligands and μ2-hydroxyl are densely distributed on the surface of rhombic channels. Gas adsorption measurements showed that TUTJ-201Ni exhibited high CH4 uptake over N2. CH4/N2 selectivity at 298 K and 1.0 bar was calculated to be 7.2. Modeling studies indicated that the pore centers surrounded with accessible oxygen atoms are the optimal bonding sites. The stronger adsorption affinity of CH4 can be attributed to multiple hydrogen bonding. The exceptional CH4/N2 separation performance of this material was further evaluated using breakthrough experiments.

Graphical abstract: Construction of a novel nickel-based MOF with accessible oxygen sites for efficient CH4/N2 separation

Supplementary files

Article information

Article type
Research Article
Submitted
22 Apr 2024
Accepted
22 May 2024
First published
23 May 2024

Inorg. Chem. Front., 2024,11, 3889-3896

Construction of a novel nickel-based MOF with accessible oxygen sites for efficient CH4/N2 separation

F. Zhang, Y. Tang, Z. Zhao, M. Lu, X. Wang, J. Li and J. Yang, Inorg. Chem. Front., 2024, 11, 3889 DOI: 10.1039/D4QI01008F

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