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NOx Control Division
NOx Control Division members have expertise in the control of NOx emissions from stationary sources.  NOx is formed in the combustion process, and when emitted combines  with volatile organic carbon (VOC) in the atmosphere to form ozone, an ambient criteria air pollutant regulated under the Clean Air Act.  NOx emissions also combine with ammonia to form PM2.5, another criteria pollutant regulated under the Clean Air Act. NOx emissions are typically controlled with combustion modifications, SNCR (selective non-catalytic reduction), or SCR (selective catalytic reduction). 

Regulatory Drivers

Regulatory drivers for NOx control include the periodic revisions to the National Ambient Air Quality Standards (NAAQS), regulations that deal with the interstate transport issue such as the Cross State Air Pollution Rule (CSAPR), and local regulations in ozone and PM2.5 nonattainment areas.


Division Activity


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