Technical Paper
Recent Developments for CeBa Hybrid Materials with Enhanced Properties for BS-6 NOx Storage Applications
2017-01-10
2017-26-0123
In order to achieve NOx tailpipe targets of current diesel regulation standards two main catalytic technologies have been employed, specifically NH3-SCR and LNT. However both of these technologies face challenges with the implementation of newer / colder test cycles such as “Real Driving Emissions” (RDE), combined with CO2 targets (95 g/km is 2020 target in Europe). These cycles will require higher NOx Storage Capacity (NSC) in the low temperature region (120-350°C). Conversely, lean-burn Gasoline vehicles, with their higher operational temperatures, will require improved NSC over a broader temperature range (200-500°C). Therefore, the development of NSC materials to meet these opposing requirements is an area of extensive study by Original Equipment Manufacturers (OEMs), washcoaters, and raw materials suppliers. Today, ceria is a key component in the formulation of active NSC washcoats.