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Multivariate MOF-303/MIL-160 balancing the trade-off between capacity and selectivity in CO2/CH4 separation
Mingming Xu1,2, Xiaokang Wang1, Jingjing Chen1
1Shandong Key Laboratory of Intelligent Energy Materials, State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China. dfsun@upc.edu.cn.
Abstract:
Porous adsorbents with high capacity and selectivity are recognized as promising alternatives for energy-efficient gas separation, but the inherent trade-off between the two metrics hinders their industrial application. Herein, we synthesize a multivariate Al-based metal-organic framework (MOF), namely MOF-303/MIL-160, for CO2/CH4 separation under the guidance of reticular chemistry. The obtained MOF-303/MIL-160 contains both 3,5-pyrazoledicarboxylic acid, the ligand of MOF-303, and 2,5-furandicarboxylic acid, the ligand of MIL-160, in a ratio of 1 : 0.51. MOF-303 exhibits high capacity but low selectivity, whereas MIL-160 shows the opposite. Multivariate MOF-303/MIL-160 draws upon their respective strong points, realizing the balance of trade-off between capacity and selectivity in CO2/CH4 separation.
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