Abstract
We report a record-high SO2 adsorption capacity of 12.3 mmol g–1 in a robust porous material, MFM-601, at 298 K and 1.0 bar. SO2 adsorption in MFM-601 is fully reversible and highly selective over CO2 and N2. The binding domains for adsorbed SO2 and CO2 molecules in MFM-601 have been determined by in situ synchrotron X-ray diffraction experiments, giving insights at the molecular level to the basis of the observed high selectivity.
Highlights
The International Energy Outlook 2017 report produced by the U.S Energy Information Administration predicts that fossil fuels will account for ∼77% of global energy production in 2050, with coal comprising a major component of the overall energy supply.[1]
Metal−organic frameworks (MOFs) are emerging porous materials constructed from metal clusters with organic linkers,[9] and their tuneability makes them interesting candidates for many applications.[10]
Much work has focused on the study of gas separations in MOFs, very little effort has been devoted to the sequestration of SO2,11 since it often leads to severe structural degradation of the material and/or irreversible uptake
Summary
Journal of the American Chemical Society proton topology.[13] In MFM-601, the H4L monodentate linkers from the equatorial positions of the {Zr6} cluster have been removed (Figure 1) and replaced with terminal H2O Isotherm for SO2 leading to an exceptionally high uptake of 12.3 mmol g−1 (146% enhancement) at 298 K and 1.0 bar, representing the highest value observed in porous solids and notably higher than a range of best-behaving SO2 sorbents (Table S1).
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