|About this Abstract
||Materials Science & Technology 2012
||Nanotechnology for Energy, Environment, Healthcare and Industry
||Physicochemical Characterization of Cerium Particles Generated by Combustion of Ce-Doped Diesel Fuel
||Robert Willis, Kristin Bunker, Traci Lersch, Gary Casuccio, Eric Grulke, Natalia Mandzy, Joseph Conny, Michael Lewandowski, Jason Weinstein, Jonathan Krug, Kasey Kovalcik, David Nash
|On-Site Speaker (Planned)
Diesel engines emit large amounts of soot which degrades air quality and harms public health. Nanoscale metal-oxide fuel-borne catalysts (FBCs) have been shown to reduce soot emissions and improve fuel efficiency. FBCs utilizing nano-sized cerium oxide (ceria) particles are used in other countries, but are not approved for on-road use in the US. The EPA’s Nanomaterial Research Strategy has targeted ceria as a nanomaterial of concern due to the potential for human and ecosystem exposure to nanoceria particles released to the atmosphere.In order to understand the exposure potential and environmental fate of nanoceria particles from use of FBCs, the EPA is conducting research to characterize the morphology, composition, and size distribution of cerium-rich particles generated by combustion of ceria-doped fuel. We will discuss results obtained using a nano-MOUDI™ cascade impactor to collect size-resolved particulate samples on filters (analyzed by ICP-MS) and TEM grids (analyzed with high-resolution electron microscopy).