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Pore Size Reduction by Methyl Function in Aluminum-Based Metal–Organic Frameworks for Xenon/Krypton Separation
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-11-17 , DOI: 10.1021/acs.cgd.0c01283 Zhaotong Yan 1 , Youjin Gong 1 , Chu-Ting Yang 1 , Xiaonan Wu 1 , Boyu Liu 1 , Qiang Liu 1 , Shunshun Xiong 1 , Shuming Peng 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-11-17 , DOI: 10.1021/acs.cgd.0c01283 Zhaotong Yan 1 , Youjin Gong 1 , Chu-Ting Yang 1 , Xiaonan Wu 1 , Boyu Liu 1 , Qiang Liu 1 , Shunshun Xiong 1 , Shuming Peng 1
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The design and construction of radioactive stable metal–organic frameworks (MOFs) are highly desirable for noble gases (Xe and Kr) separation from off-gas steams during used nuclear fuel reprocessing under radiation environments. Al-based MOFs are promising for realistic applications of Xe/Kr separation due to their high hydrothermal and chemical stability and comparatively easy and massive preparation by nonpoisonous, abundant, and cheap metal. Herein, we report on two isoreticular microporous Al-MOFs Al-Fum (Al-fumarate, Basolite A520) and Al-Fum-Me (Al-methyl-fumarate) with high radioactive stability for Xe/Kr separation. Appending methyl groups on the framework provides an effective approach to reduce and fine-tune the pore size of Al-Fum-Me to match well with the Xe atom and remarkably improve the framework-Xe affinity. Al-Fum-Me exhibits significantly enhanced Xe/Kr separation performance compared to Al-Fum, demonstrated by adsorption isotherms and breakthrough experiments. Gamma-ray irradiation experiments also identified the high radioactive stability of Al-Fum-Me, suggesting its great potential for practical application on Xe/Kr separation.
中文翻译：
铝基金属有机骨架中氙/ ethyl分离中甲基功能降低的孔径
放射性稳定金属-有机骨架（MOF）的设计和构造非常适合在辐射环境下使用过的核燃料后处理过程中，从废气中分离出稀有气体（Xe和Kr）。铝基MOF具有很高的水热和化学稳定性，并且相对容易和大量地由无毒，丰富和廉价的金属制备，因此有望用于Xe / Kr分离的实际应用。在本文中，我们报道了Xe / Kr分离具有高放射性稳定性的两种等网状微孔Al-MOF Al-Fum（富马酸铝，Basolite A520）和Al-Fum-Me（富马酸铝甲酯）。在骨架上附加甲基可提供一种有效的方法来减少和微调Al-Fum-Me的孔径，使其与Xe原子很好地匹配，并显着提高骨架与Xe的亲和力。通过吸附等温线和突破性实验证明，与Al-Fum相比，Al-Fum-Me表现出显着增强的Xe / Kr分离性能。伽马射线辐照实验还确定了Al-Fum-Me的高放射性稳定性，表明其在Xe / Kr分离中的实际应用具有巨大潜力。
更新日期：2020-12-02
中文翻译：
铝基金属有机骨架中氙/ ethyl分离中甲基功能降低的孔径
放射性稳定金属-有机骨架（MOF）的设计和构造非常适合在辐射环境下使用过的核燃料后处理过程中，从废气中分离出稀有气体（Xe和Kr）。铝基MOF具有很高的水热和化学稳定性，并且相对容易和大量地由无毒，丰富和廉价的金属制备，因此有望用于Xe / Kr分离的实际应用。在本文中，我们报道了Xe / Kr分离具有高放射性稳定性的两种等网状微孔Al-MOF Al-Fum（富马酸铝，Basolite A520）和Al-Fum-Me（富马酸铝甲酯）。在骨架上附加甲基可提供一种有效的方法来减少和微调Al-Fum-Me的孔径，使其与Xe原子很好地匹配，并显着提高骨架与Xe的亲和力。通过吸附等温线和突破性实验证明，与Al-Fum相比，Al-Fum-Me表现出显着增强的Xe / Kr分离性能。伽马射线辐照实验还确定了Al-Fum-Me的高放射性稳定性，表明其在Xe / Kr分离中的实际应用具有巨大潜力。
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