Urea Tanks on Diesel Trucks
Automotive Grade of World’s Most Widely Used Nitrogen Fertilizer Used to Meet New U.S. Environmental Regulations to Cut Air Pollution
Urea SCR Systems Lower Nitrogen Oxide (NOx) Emissions From Diesel Exhaust. 80% of Diesel Trucks in Europe Now Use Urea SCR
Urea tanks will be standard equipment for most new diesel trucks, buses, cars, and sport utility vehicles (SUVs) manufactured in the United States after Jan. 1, 2010. An automotive grade of urea will be injected into the vehicles’ exhaust stream to “scrub” nitrogen oxide (NOx) from the diesel exhaust. NOx, a major air pollutant, contributes to smog, which causes asthma and respiratory and heart diseases.
The system, urea SCR or “urea-based selective catalytic reduction,” is the only technology available that can remove enough NOx from diesel exhaust to comply with strict new limits imposed by the U.S. Environmental Protection Agency (EPA), says Glenn Kedzie, Environmental Counsel for the American Trucking Associations
How Urea SCR Systems Work
Urea SCR cleans the exhaust after combustion. The urea solution is held in a separate storage tank and injected as a fine mist into the hot exhaust gases. The heat breaks the urea down into ammonia—the actual NOx-reducing agent. Through a catalytic converter, the ammonia breaks the NOx down to harmless nitrogen (N) gas and water vapor. The exhaust is no longer a pollutant; the atmosphere is about 80% nitrogen gas.
How do you feel about this law? Please let us know if you think this will work or just make diesels more expensive.
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