Radiation-resistant metal-organic framework enables efficient separation of krypton fission gas from spent nuclear fuel

被引：0
作者：
Sameh K. Elsaidi
Mona H. Mohamed
Ahmed S. Helal
Mitchell Galanek
Tony Pham
Shanelle Suepaul
Brian Space
David Hopkinson
Praveen K. Thallapally
Ju Li
机构：
[1] University of California,Department of Chemical and Biomolecular Engineering
[2] Berkeley,Department of Chemistry
[3] Oak Ridge Institute for Science and Education,Chemistry Department, Faculty of Science
[4] DOE National Energy and Technology Laboratory (NETL),Department of Nuclear Science and Engineering and Department of Materials Science and Engineering
[5] University of Pittsburgh,Office of Environment, Health & Safety
[6] Alexandria University,Department of Chemistry, Biochemistry, and Physics
[7] Nuclear Materials Authority,Department of Chemistry
[8] Massachusetts Institute of Technology,Physical and Computational Science Directorate
[9] Massachusetts Institute of Technology,undefined
[10] The University of Tampa,undefined
[11] University of South Florida,undefined
[12] Pacific Northwest National Laboratory,undefined
来源：
Nature Communications | / 11卷
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摘要：
Capture and storage of volatile radionuclides that result from processing of used nuclear fuel is a major challenge. Solid adsorbents, in particular ultra-microporous metal-organic frameworks, could be effective in capturing these volatile radionuclides, including 85Kr. However, metal-organic frameworks are found to have higher affinity for xenon than for krypton, and have comparable affinity for Kr and N2. Also, the adsorbent needs to have high radiation stability. To address these challenges, here we evaluate a series of ultra-microporous metal-organic frameworks, SIFSIX-3-M (M = Zn, Cu, Ni, Co, or Fe) for their capability in 85Kr separation and storage using a two-bed breakthrough method. These materials were found to have higher Kr/N2 selectivity than current benchmark materials, which leads to a notable decrease in the nuclear waste volume. The materials were systematically studied for gamma and beta irradiation stability, and SIFSIX-3-Cu is found to be the most radiation resistant.
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