期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 38, 页码 15823-15828出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta03656e
关键词
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资金
- National Natural Science Foundation of China [21371069]
- Graduate Innovation Fund of Jilin University [2014008]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110061110015]
- National High Technology Research and Development Program of China (863 program) [2013AA031702]
We report on the storage capacity and separation selectivity of an rht-type metal-organic framework, Cu-TDPAT [TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine], for C-2 hydrocarbons over CH4. Henry's constant, the isosteric heat of adsorption and the ideal adsorbed solution theory selectivity were calculated based on single-component sorption isotherms. Theoretical calculations indicate that both the open metal sites and the Lewis basic sites have strong interactions with the C-2 molecules. The combination of these two kinds of sites lead to the highest C2H2-CH4 selectivity of 127.1 as well as record high values for C2H4 adsorption enthalpies. To mimic real-world conditions, breakthrough experiments were conducted on an equimolar four-component mixture containing C2H2, C2H4, C2H6 and CH4 at room temperature and 1 atm pressure. Our results show that Cu-TDPAT is a promising candidate for CH4 capture and purification.
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