Located in Mississauga, Ontario, Canada, Nett Technologies specializes in emission-control products for engines, vehicles and machinery used in the mining, material handling and construction industries. The company's wide range of products includes catalytic converters for diesel, natural gas, liquefied petroleum gas and gasoline engines, diesel particulate filters and fume diluters.
The Nett BlueMAX selective catalytic reduction (SCR) system is designed to control nitrogen oxide emissions from medium- and heavy-duty diesel engines, using a control strategy that relies on a NOx concentration measurement by a sensor positioned upstream of the SCR catalyst.
"The NOx sensor-based control strategy makes the system very suitable for retrofit applications," said M.A. Mannan, business manager for Nett Technologies. "No time-consuming calibration, such as through engine mapping, is necessary, and the system can be installed on a wide range of diesel engines, including mechanical engines."
The system also controls diesel particulate matter, hydrocarbons and carbon monoxide, Mannan said.
"Selective-catalytic reduction, which was first developed for the abatement of NOx from power plants, is considered to have the best NOx-removal potential and durability for heavy-duty diesel vehicles," Harold said.
The specifications for the vehicles to be tested vary, Harold said, but all have Caterpillar engines with model years between 1998 and 2004 and horsepower between 120 and 305. Therefore, he said, the emissions reductions from each vehicle will vary.
"There is only one retrofit for nonroad vehicles on the EPA's emerging technology list that results in NOx reduction," Harold said. "Currently, the only other option for reducing NOx from this class of equipment is to purchase a new engine. Installing r
|Contact: Angela Hopp|
University of Houston