强大且耐辐射的霍夫曼型金属有机框架用于记录 xenon/krypton 分离
Jiyan Pei1, Xiao-Wen Gu1, Cong-Cong Liang1
1State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Journal of the American Chemical Society
|February 9, 2022
概括
两个新的霍夫曼型金属有机框架 (MOF) 证明了创纪录的 (Xe) 吸收和选择性比 (Kr) 分离. 这些先进的吸附剂为工业气体分离应用提供了卓越的性能.
科学领域:
- 材料科学
- 化学工程
- 分离科学
背景情况:
- 由于它们的物理性质相似,将 (Xe) 与 (Kr) 分离是具有挑战性的.
- 高性能吸附剂对于高效的工业气体分离至关重要.
研究的目的:
- 为高效 Xe/Kr 分离开发新型吸附剂.
- 研究新的金属有机框架 (MOF) 的吸附特性.
主要方法:
- 两种霍夫曼型MOF的合成:Co ((pyz) [Ni ((CN) 4 (ZJU-74a-Ni) 和Co ((pyz) [Pd ((CN) 4 (ZJU-74a-Pd)).
- 使用单晶X射线衍射进行表征.
- 在环境条件下测量气体吸附和选择性.
- 对Xe/Kr气体混合物的突破性实验.
主要成果:
- ZJU-74a-Ni和ZJU-74a-Pd显示了Xe吸收能力 (89.3和98.4厘米3) 和Xe/Kr选择性 (74.1和103.4).
- 在ZJU-74a-Ni中独特的"三明治状"结合点增强了Xe亲和力.
- 在突破性测试中,ZJU-74a-Pd显示了高Xe吸收 (4.63 mmol cm-3) 和Kr生产率 (214 cm3 g-1).
- 这两种MOF都是坚固且抗辐射的.
结论:
- 开发的MOF代表了Xe/Kr分离的最先进材料.
- 独特的孔隙结构和金属位点相互作用是高性能的关键.
- 这些材料对贵重气体分离的工业应用具有显著的前景.
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