This one is defintely competition
Project N-019
Development and Demonstration of NOxTech's Ceramic Catalyst NOx Reduction System
Sub-Contractors: Analytical Engineering, Inc.
Emission standards in the US will require reduction of diesel emissions for transportation vehicles (light and heavy-duty diesel powered trucks and buses) agricultural equipment and construction equipment by as much as 90% from current level in the 2005-2012 time frame. It will be very difficult for industry to achieve these levels with minimal impact on drivability while maintaining acceptable first fit cost and durability.
NOx reduction approaches presently being developed present many problems and difficulties. Catalyst poisoning, high costs, thermal cycling, parasitic losses and supplying a practical reductant make the performance and life of NOx adsorbers and lean NOx catalysts problematic. SCR systems require an external fluid to be commercially distributed and carried on commercial vehicles, have significant enforcement issues, and operate inefficiently at low temperatures. Combustion control technologies such as EGR, high injection pressures, variable geometry turbine for air handing and other similar mechanisms used to control NOx emissions from diesel engines add complexity, cost and reduce reliability and efficiency.
Analytical Engineering, Inc. (AEI) and NOxTech, Inc. are jointly developing and demonstrating a tailored reductant and ceramic NOx catalyst (TRCNC) system as a promising alternative for exhaust aftertreatment of NOx from diesel exhaust. The TRCNC offers high sulfur tolerance, a wide range of adjustable operating temperatures, and perhaps most importantly the catalysts employ minimal to no precious metals in the entire system. At the same time it significantly reduces parasitic losses (improves fuel efficiency) and reduces emission control system complexity at much lower costs than other systems being investigated. The TRCNC system can be tailored for maximum efficiency at specific operating temperatures bands while maintaining efficient reduction outside those pre-selected ranges.
The objectives of our program are to demonstrate the NOxTech ceramic catalyst system on a 300 hp high speed diesel engine and achieve a 90% NOx reduction over a 100°C specified range with an overall average reduction of 80% over an exhaust temperature range of 150° - 600°C. This effort will focus on tailoring a system for peak efficiency over a lower temperature range of 175°C to 275°C while maintaining efficient reduction during temperature excursions. The demonstrated results for this technology are already impressive.
Demonstrated 92% NOx reduction on diesel exhaust slip stream at 30,000 hr-1, 2% parasitic loss and with 500 ppm SOx (commercial diesel fuel) in the exhaust stream.
Demonstrated 65% NOx reduction over the FTP transient cycle on the full exhaust flow from 165 hp diesel engine with 500 ppm SOx.
