Clean Diesel Technologies Inc. has signed a license agreement with Combustion Component Associates Inc. (CCA) for Clean Diesel's ARIS urea selective catalytic reduction (SCR) technology,
designed to reduce nitrogen oxide emissions by up to 90% from heavy-duty diesel vehicles.
Clean Diesel Technologies, headquartered in Stamford, Conn., is a specialty chemical company with patented products that the company says reduce emissions from diesel engines while improving fuel economy and power. Products include Platinum Plus fuel catalysts and the ARIS 2000 urea injection systems for selective catalytic reduction of NOx.
Under the license agreement, CCA will pay Clean Diesel $150,000 for the license along with running royalties on systems sold, and will commit an additional $100,000 toward development and EPA and California Air Resources Board verification programs for the mobile system.
The non-exclusive license covers application of the technology to existing on-highway and off-road mobile engines as well as portable diesel engines in the U.S. and Canada.
Areas such as Houston, Dallas, Sacramento, Los Angeles and Atlanta are under strong pressure to reduce NOx emissions from mobile diesel engines to meet local ambient air quality standards. Engine manufacturers in the U.S., Europe and Japan are also looking to urea SCR to help meet more stringent emission regulations for new vehicles beginning in 2005-2010.
Clean Diesel's patented combination of urea SCR with exhaust gas recirculation (EGR) technology can already achieve the 2007-2010 NOx standards in the U.S. Most U.S. heavy-duty engine companies have already begun to apply EGR for the first step of reduction required as of October 2002 for new engines, and will require a further 90% reduction in emissions in the 2007-2010 period.
Urea SCR is likely to be the most cost-effective technology to meet these future standards, according to Clean Diesel Technologies.
The ARIS NOx reduction system is a patented urea SCR technology that injects non-toxic urea-based solution into the exhaust gas of a diesel engine upstream of the SCR catalyst. When mixed with nitrogen oxides in the exhaust, urea reacts across the catalyst to convert NOx to elemental nitrogen and water vapor.
The ARIS electronic control unit is programmed to control the ARIS urea injector based on engine operating conditions and precisely injects the amount of urea required to react with NOx in the exhaust, even as engine load and speed change.
More than a dozen ARIS injection systems have been supplied to engine manufacturers, government agencies, catalyst companies and exhaust system manufacturers to investigate the technology for mobile applications.
For more information contact Clean Diesel Technologies at www.cdti.com.