A metal-organic framework-based splitter for separating propylene from propane
A metal-organic framework-based splitter for separating propylene from propane
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DOI：
10.1126/science.aaf6323
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发表时间：
2016-07-08
期刊：
影响因子：
56.9
通讯作者：
Eddaoudi, M.
中科院分区：
文献类型：
--
作者：
Cadiau, A.;Adil, K.;Eddaoudi, M.
化学工业依赖于烯烃/链烷烃分离，这主要是通过使用能源密集型工艺来实现的。我们报告了使用网状化学来制造化学稳定的氟化金属有机框架（MOF）材料（NbOFFIVE-1-Ni，也称为KAUST-7）。Ni（II）-吡嗪正方形网格层与（NbOF 5）（2-）柱的桥接提供了三维MOF的构造，在收缩的正方形通道中包围氟阴离子的周期性阵列。明智地选择的体积较大的（NbOF 5）（2-）引起了先前自由旋转的吡嗪部分的所寻找的阻碍，限定了孔系统并决定了孔径大小及其最大开口。限制的MOF窗口导致在大气压下从丙烯中选择性分子排斥丙烷，通过多循环混合气体吸附和量热研究证明。
The chemical industry is dependent on the olefin/paraffin separation, which is mainly accomplished by using energy-intensive processes. We report the use of reticular chemistry for the fabrication of a chemically stable fluorinated metal-organic framework (MOF) material (NbOFFIVE-1-Ni, also referred to as KAUST-7). The bridging of Ni(II)-pyrazine square-grid layers with (NbOF5)(2-) pillars afforded the construction of a three-dimensional MOF, enclosing a periodic array of fluoride anions in contracted square-shaped channels. The judiciously selected bulkier (NbOF5)(2-) caused the looked-for hindrance of the previously free-rotating pyrazine moieties, delimiting the pore system and dictating the pore aperture size and its maximum opening. The restricted MOF window resulted in the selective molecular exclusion of propane from propylene at atmospheric pressure, as evidenced through multiple cyclic mixed-gas adsorption and calorimetric studies.