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The first example of commensurate adsorption of atomic gas in a MOF and effective separation of xenon from other noble gases

Hao WangDepartment of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, USAKexin YaoAdvanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi ArabiaZhijuan ZhangInstitute of Atmospheric Environment Safety and Pollution Control, Jinan University, Guangzhou, ChinaJacek JagiełłoQihan GongDepartment of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, USAYu HanAdvanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi ArabiaJing LiDepartment of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, USA

2013en

ABI

Annotatsiya

In industry, cryogenic rectification for separating xenon from other noble gases such as krypton and argon is an energy and capital intensive process. Here we show that a microporous metal–organic framework, namely Co3(HCOO)6 is capable of effective capture and separation of xenon from other noble gases. Henry's constant, isosteric heat of adsorption (Qst), and IAST selectivity are calculated based on single component sorption isotherms. Having the highest Qst reported to date, Co3(HCOO)6 demonstrates high adsorption capacity for xenon and its IAST selectivity for Xe–Kr is the largest among all MOFs investigated to date. To mimic real world conditions, breakthrough experiments are conducted on Xe–Kr binary mixtures at room temperature and 1 atmosphere. The results are consistent with the calculated data. These findings show that Co3(HCOO)6 is a promising candidate for xenon capture and purification. Our gas adsorption measurements and molecular simulation study also reveal that the adsorption of xenon represents the first example of commensurate adsorption of atomic gases near ambient conditions.

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Identifikatorlar

DOI: 10.1039/c3sc52348a

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