Module 106: Natural gas boiler flue gas recirculation to reduce NOx em…
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1121, Control of Nitrogen Oxides from Residential Type, Natural Gas-Fired Water Heaters, on December 1, 1978. This rule imposes an emission limit of 40 nanograms of NO x (calculated as NO 2) per joule of heat output for residential type, natural gas-fired water heaters. Natural gas-fired water heaters require testing
Sep 26, 2018 · Nitrogen plays no part in the combustion process of natural gas and would, ideally, pass through the boiler without reaction. However, there are three primary processes that create NOx during natural gas combustion: thermal NOx; fuel NOx; and prompt NOx. (See box-out for an explanation of the oxides of nitrogen.)
The emissions from natural gas-fired boilers and furnaces include nitrogen oxides (NOx), carbon monoxide (CO), and carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O), volatile organic compounds (VOCs), trace amounts of sulfur dioxide (SO 2 ), and particulate matter (PM).
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