About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
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Presentation Title |
Linking Structure and Catalytic Properties of Heterogeneous and Automotive Catalysts Through High Resolution X-ray Nanotomography and Cryogenic Focused Ion Beam Microscopy in Three Dimensions |
Author(s) |
Andy Holwell, Maadhav Kothari, Markus Boese, Aakash Varambhia, Dogan Ozkaya |
On-Site Speaker (Planned) |
Andy Holwell |
Abstract Scope |
Heterogeneous catalysts are a broad class of engineered porous materials, of high surface area and surface functionalization. Complex structure-property relationships are defined by porosity, permeability, nanoparticles and adhesion.
We demonstrate novel multiscale 3D microscopy approaches to imaging internal structures and simulating performance of gasoline particulate filters (GPF), polymer electrolyte fuel cells (PEFC) and metal organic frameworks (MOF). We describe X-ray microscopy techniques for 3D imaging, pore analysis, and quantification of catalytic layers on substrates.
Deep learning was used for reconstruction, measurement and multiphase segmentation of GPF datasets, which were inputted into gas flow simulations relating pressure drop to performance and reactivity, using experimentally-derived conditions.
X-ray nanotomography was used to simulate gas diffusion through pore networks in PEFC. Non-destructive 4D studies were enabled by time-resolved in situ experiments.
Finally, novel cryogenic FIB microscopy techniques were developed for volumetric analysis and lamella preparation for nanoanalytics of MOF materials. |