REI takes an integrated approach to pollutant emissions
from combustion sources. We continue to innovate and develop new
models and modeling tools in the areas of NOx, SO2, and mercury.
We put our modeling tools to work for clients, solving problems
in a variety of industrial applications.
Oxides of Nitrogen (NOx):
REI advises clients on a wide variety of NOx control technologies.
We use our CFD and other modeling tools to predict emissions in
utility and industrial boilers for integrated NOx control:
When we evaluate NOx control strategies, we do more
than prediction NOx emissions. REI has the tools and expertise to
look at aspects of NOx control that affect operation and performance
of combustion systems, including LOI,
and deactivation of SCR catalyst
Sulfur: In some
coal-fired boilers, corrosion rates can be dominated by by the presence
of reducing gases (CO and H2S) or by the deposition of ash or char
containing partially reacted material (sulfur and carbon). Accordingly,
REI has modeled the evolution of sulfur species in the combustion
The evolution of SO3 in the backpass of a coal-fired
boiler impacts both operation (air heater fouling, low-temperature
corrosion) and emissions (visible plumes). REI uses models for SO2
oxidation to predict production of SO3. Detailed CFD modeling of
injection of calcium and magnesium for SO3 control in the backpass
has also been carried out
December 2000, EPA announced their intent to regulate mercury emissions
from nation’s coal-fired power plants. Estimates for the cost
of meeting mercury regulations at the level of 90% removal efficiency
range from $2 to $5 billion per year. With mercury regulations imminent,
mercury control technologies need to be proven at full scale to
document performance and costs.
Learn more about mercury chemistry in the environment
and in flue gas from REI's Mercury Tutorial.
Global Mercury Cycle in the Environment:
REI is developing fundamental models for predicting mercury behavior in coal-fired power plants and is participating in the DOE-sponsored program on demonstration of full-scale injection of powdered activated carbon for control of mercury emissions.
Contact us for information on how we can help.