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NRMRL's Air Pollution Prevention and Control Division's Air Pollution Technology Branch has performed research and developed technologies for NOx reduction via combustion modification. Techniques such as low-excess air firing, staged combustion, flue gas recirculation, low NOx burners, and reburning have been applied to a wide range of combustion equipment including utility and industrial boilers, industrial process combustors, stationary engines, residential space heaters, and woodstoves. In-house projects include investigations of improved NOx reduction by injection of steam into the reburn zone, evaluations of advanced reburning techniques, and optimization of combustion/flue gas treatment hybrid NOx control techniques. For additional information on this research, visit the website at (http://www.epa.gov/appcdwww/crb/aptb/nox.htm). To access directly from this website, click on downloads on the navigation bar.

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