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arXiv 1209.4400cond-mat.mtrl-sciphysics.chem-ph
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金属有机骨架(MOFs)选择性分离烃类的开阀压力调节

Tuning the Gate Opening Pressure of Metal Organic Frameworks (MOFs) for the Selective Separation of Hydro-carbons

Nour Nijem, Haohan Wu, Pieremanuele Canepa, Anne Marti, Kenneth J. Balkus,, T. Thonhauser, Jing Li, Yves J. Chabal

摘要:

烃的分离是最需要能量的过程之一。因此,开发在合理条件下选择性吸附碳氢化合物的材料的需求至关重要。这项工作揭示了在灵活的金属有机框架(MOF)出乎意料的烃的选择性,基于他们的闸门打开压力的差异。我们表明选择性依赖于链长和特定的框架气体相互作用。结合拉曼光谱和理论的范德华密度泛函(vdW-DF)计算,分离机制,这种意想不到的门打开行为被揭示。

英文摘要:

Separation of hydrocarbons is one of the most energy demanding processes. The need to develop materials for the selective adsorption of hydrocarbons, under reasonable conditions, is therefore of paramount importance. This work unveils unexpected hydrocarbon selectivity in a flexible Metal Organic Framework (MOF), based on differences in their gate opening pressure. We show selectivity dependence on both chain length and specific framework-gas interaction. Combining Raman spectroscopy and theoretical van der Waals Density Functional (vdW-DF) calculations, the separation mechanisms governing this unexpected gate opening behavior are revealed.

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