Tuning the Gate Opening Pressure of Metal–Organic Frameworks (MOFs) for the Selective Separation of Hydrocarbons
Journal of the American Chemical Society2012Vol. 134(37), pp. 15201–15204
Citations Over TimeTop 1% of 2012 papers
Nour Nijem, Haohan Wu, Pieremanuele Canepa, Anne M. Marti, Kenneth J. Balkus, Timo Thonhauser, Jing Li, Yves J. Chabal
Abstract
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. By 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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