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Micro Computed Tomography Analysis of Four-Way Conversion Catalysts using Artificial Intelligence-Enabled Image Processing

With stricter particulate matter (PM) emission regulations, PM filters coated with a three-way conversion catalyst (TWC), named four-way catalysts (FWC), are being deployed in gasoline-engine powered vehicles. Most FWCs consist of TWC formulations coated either on-walls or in-walls of high-porosity ceramic filter substrates. Typical visualization method for characterizing these catalyzed filters is the scanning electron microscope (SEM), which also can overlay elemental distribution information using Energy-Dispersive X-Ray Spectroscopy (EDS).