About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
|
Presentation Title |
Thermodynamics of Molybdenum Oxide Clusters Encapsulated in Zeolite Y |
Author(s) |
Xianghui Zhang, Vitaliy Goncharov, Cody Cockreham, Esra Y. Mertsoy, Hui Sun, Su Ha, Jean-Sabin McEwen, Xiaofeng Guo, Di Wu |
On-Site Speaker (Planned) |
Xianghui Zhang |
Abstract Scope |
Subnanoscale encapsulation of molybdenum (Mo) oxides within zeolites leads to low-cost catalytic materials with comparable performance as precious metal containing zeolite catalysts in important industry scale reactions such as methane conversion and biomass upgrading. Despite extensive exploration in material synthesis, catalytic mechanisms and reaction engineering, the thermodynamics of subnano-encapsulated Mo oxide clusters within the micropores of zeolites are rarely investigated. Here, we present our recent studies on the energetic, structural and catalytic performance evolutions of Mo oxides confined in a family of zeolite Y with faujasite (FAU) topology (Si/Al from 2.9 to 45.6). Using high temperature solution calorimetry, thermal analysis with integrated TG-DSC-MS, in situ XRD, in situ DRIFTS, electron microscopy and a catalyst evaluation system, we successfully measured the formation enthalpies of these MoOx/FAU samples, and elucidated their energetics-structure-performance relationships in methane conversion. |