| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
|
| Presentation Title |
Utilizing, Tuning, and Modeling Adsorption in Flexible MOFs for Improved Separation of Binary Mixtures |
| Author(s) |
Lukas Willi Willi Bingel, Krista S. Walton |
| On-Site Speaker (Planned) |
Lukas Willi Willi Bingel |
| Abstract Scope |
Metal-organic frameworks (MOFs) with cooperative structural flexibility are a promising solution for energy-efficient gas storage and separation. These functional porous materials exhibit auspicious potential to replace traditional separation technologies, thereby significantly reducing the overall carbon footprint. Here, we present the application of CdIF-13, a flexible MOF with desired inverse selectivity for propane-propylene separation from industrially relevant mixtures. The preferred adsorption of the alkane over the alkene is explained through in situ synchrotron X-ray diffraction measurements combined with first-principle calculations. To further enhance the potential of flexible MOFs for tailored gas separations, a material modification route through linker functionalization is presented. For ZIF-7, the zinc congener of CdIF-13, this approach results in improved selectivity, cyclability, and performance for biogas separation. Lastly, we present a new isotherm model describing type V isotherms – typical for these materials – and how this expression can be used to determine heats of adsorption. |