Creating uniform pores for xenon/krypton and acetylene/ethylene separation on a strontium-based metal-organic framework
Creating uniform pores for xenon/krypton and acetylene/ethylene separation on a strontium-based metal-organic framework
复制标题
在锶基金属有机框架上创建用于氙/氪和乙炔/乙烯分离的均匀孔
DOI：
10.1016/j.jssc.2020.121337
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发表时间：
2020
影响因子：
3.3
通讯作者：
Luo Feng
中科院分区：
文献类型：
--
作者：
Xiong Jianbo;Li Ailin;Fan Yaling;Xu Zhenzhen;Feng Han;Gao Qiang;Fan Qiangwen;He Yan;Gao Zhi;Luo Feng
氙/氪和乙炔/乙烯系统的工业分离是具有挑战性的能源密集型工艺。探索新型多孔材料对它们的分离具有重要意义。本文报道了一种锶基热稳定金属有机骨架化合物[Sr 4（TCPE 4 −）2（DMF）4（H2O）4]n·溶剂（1）（TCPE =四（4-羧基苯基）乙烯），具有直径为3.60 μ m（1型孔）的四角形孔。在真空中加热MOF 1可以驱动配位溶剂分子离开并打开直径为4.40 μ m的2型孔。这有助于氙和乙炔的吸收，其中氙/Kr选择性为6.93（氙/Kr = 20：80），乙炔/乙烯选择性为1.75（乙炔/乙烯= 1：99）。密度泛函理论（DFT）计算揭示了MOF骨架与吸附的氧原子之间的相互作用。
Industrial separations of xenon/krypton and acetylene/ethylene systems are challenging and energy-intensive processes. Exploring new porous material for their separation is of great significance. We reported here a strontium based thermostable metal-organic framework [Sr4(TCPE4−)2(DMF)4(H2O)4]n·solvent (1) (TCPE = tetrakis(4-carboxyphenyl)ethylene) with quadrangular pores possess diameter of 3.60 Å (type-1 pore). Heating the MOF1in vacuum can drive the coordinated solvent molecules away and open the type-2 pores with diameter of 4.40 Å. This contributes to xenon and acetylene absorption with Xe/Kr selectivity of 6.93 (Xe/Kr = 20:80) and acetylene/ethylene selectivity of 1.75 (acetylene/ethylene = 1:99). The density functional theory (DFT) calculations revealed the interactions between the MOF skeleton and the absorbed Xe atom.