Nitrogen Oxide (NOx) and Carbon Monoxide (CO) Emissions from a Small Methanol-Fired Boiler.
Final rept. Oct 92-Sep 95,
NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
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Target emission levels for nitrogen oxide NOx and carbon monoxide CO for Mobile Utility Support Equipment MUSE boilers were established at 30 and 400 ppm at 3 percent O2, respectively. It was recommended that new MUSE boilers be acquired with natural-gas-firing, low NOx burners and that existing boilers be evaluated for burning methanol natural gas was not a viable option to achieve environmentally limited target emission levels. A methanol fuel storage and supply system was constructed, and tests were undertaken to evaluate boiler operations and the resulting exhaust emissions. Test results showed that target NOx emission levels could be met with methanol fuel using pressure- atomizing nozzles the standard MUSE type, but that target CO emission levels would not be met. Upon changing to air-atomizing nozzles, both NOx and CO target emission levels were met over a useful boiler operating range. It is recommended that methanol be specified along with air atomizing nozzles for bringing the existing MUSE boilers into compliance with target NOx and CO emission levels. Data from the literature supported the interpretation that the use of volatile fuels methanol, in this case can lead to reduced rates of fuelair mixing, lowered combustion efficiency, and increased CO emissions. The latter was correctable, here, by the change to air atomization. jg p.3
- Inorganic Chemistry
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy