On July 11, 2006, the EPA issued regulations covering emissions from stationary
diesel engines [14]— New Source Performance Standards that limit emissions
of NOx, particulate matter, SO2, carbon monoxide, and hydrocarbons to the
same levels required for nonroad diesel engines [15]. The regulation affects
new, modified, and reconstructed diesel engines. Beginning with MY 2007
[16], engine manufacturers must specify that new engines less than 3,000
horsepower meet the same emissions standard as nonroad diesel engines.
For engines greater than 3,000 horsepower, the standard will be fully effective
in 2011 [17]. Stationary diesel engine fuel will also be subject to the
same standard as nonroad diesel engine fuel, which reduces the sulfur content
of the fuel to 500 parts per million by mid-2007 and 15 parts per million
by mid-2010.
Stationary diesel engines are used to generate electricity, to power pumps
and compressors, and in irrigation systems. It has been estimated that
there were 663,780 such engines larger than 50 horsepower in use in 1998
[18]. The EPA estimates that 81,500 engines will be subject to the controls
by 2015 and that total pollutant reductions will be more than 68,000 tons
per year.
The new standards for stationary diesel engines are included in AEO2007,
but they are unlikely to affect the projections materially. The nonroad
diesel standards were incorporated in the AEO projections previously, beginning
with AEO2005.
Notes and Sources
Contact: Crawford Honeycutt
Phone: 202-586-1420
E-mail: crawford.honeycutt@eia.doe.gov |