Rational Design of a π ‐Electron Rich Co‐MOF Enabling Benchmark C 2 H 6 /CH 4 Selectivity in Natural Gas Purification
Year: 2025
Type: article
Abstract: The growing demand for energy‐efficient natural gas purification necessitates advanced porous adsorbents that enable molecular precision in separating higher hydrocarbons C 2 H 6 /C 3 H 8 from CH ₄ while maintaining methane purity. Through rational π ‐electron engineering of the framework structure, a microporous Co‐MOF is reported, constructed from pyridine carboxylic acid‐based aromatic ligands that achieve a benchmark C₂H₆/CH₄ selectivity of 83.8, ranking among the highest reported for MOF materials. The framework also demonstrates an exceptional IAST selectivity of 715.6 for C 2 H 6 /C 3 H 8 (5/5) mixtures, coupled with high uptake capacities of 65.5 cm 3 ·g⁻¹ for C₂H₆ and 65.8 cm 3 ·g⁻¹ for C₃H₈ at 298 K and 100 kPa. This remarkable separation performance stems from the strategic incorporation of π ‐electron aromatic ligands, which enhance the C‐H··· π interactions with hydrocarbon molecules. Breakthrough experiments demonstrate practical viability, achieving 99.97% methane purity in the effluent stream. Molecular simulations confirm that the selective adsorption originates from optimized C‐H··· π interactions and van der Waals forces between the framework and guest molecules, validating the rational design approach for high‐performance MOFs in industrial gas separation.
Source: Advanced Functional Materials
Authors: Shao‐Min Wang, Li Xu, Li‐Ping Zhang, Yi‐Tao Li, Te Wang, Qing‐Yuan Yang
Institutions: University of Manchester, Xi'an Jiaotong University
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
Awards: G1361171480, G2361642182, G7065819479
OpenAlex ID: W4409406894