Microstructural features of catalyzed and uncatalyzed DPFs
Mark Stewart, PNNL
Microstructural features of ceramic exhaust filters ultimately determine pressure drop and filtration efficiency. Micro X-ray CT data from several current substrates was studied to gather fundamental information for more accurate modeling and to compare characteristics between products and major manufacturers. Micro-scale images of SCR catalyzed filters (SCRFs) were also examined to learn how the catalyst is distributed with respect to the filter wall and better understand how its presence affects flow and filtration performance.