Scrubbed for emissions
Our entire electric generation fleet is 100% scrubbed for sulfur dioxide (SO2), 90% controlled for nitrogen oxide (NOx) and reduces mercury (Hg) emissions to meet reduction requirements.
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Nitrogen oxide (NOx), sulfur dioxide (SO2), mercury (Hg) and particulate matter (PM) are produced as a result of burning coal to produce electricity. These emissions, if not controlled, can negatively impact local air quality.
Vectren has invested more than $500 million since 2001 in emissions control equipment to capture these pollutants and directly improve local air quality, making our power system one of the cleanest and best-controlled in the Midwest.
Continue reading to learn about our emission control upgrades or visit vectren.com/smartenergyfuture to learn about our plans to make our electric system even more efficient.
SO2 belongs to the family of sulfur oxide gases (SOx). Sulfur is prevalent in all raw materials, including crude oil, coal and ore that contain common metals like aluminum, lead, and iron. The sulfur present in nearly all fossil fuels combines with oxygen when coal is burned and is released into the atmosphere as SO2 gas.
When fossil fuels burn at sufficiently high temperatures, nitrogen oxides are formed. Although there are many sources of NOx—for example, gasoline-powered automobiles are major sources of NOx—coal-fired power plants account for approximately 25% of the emissions of NOx in the U.S.
PM describes a mixture of tiny solid particles such as dirt, soil, dust and ashes, as well as liquid droplets that are suspended in the atmosphere. They come from a variety of sources such as cars and factories or burning wood. PM is indirectly formed when gases from burning fossil fuels react with sunlight and water vapor.