Effect of Fuel Bound Nitrogen on Oxides of Nitrogen Emission From a Gas Turbine engine.
NAVAL AIR PROPULSION CENTER TRENTON NJ PROPULSION TECHNOLOGY AND PROJECT ENGINEERING DEPT
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Fuels of varying nitrogen content were tested in a T63-A-5A engine to measure their effects on exhaust gas emissions. Five test fuels varying in fuel bound nitrogen content from 3 microgram nitrogeng fuel to 902 microgram nitrogeng fuel were evaluated. The nitrogen content in the fuel was adjusted by mixing a JP-5 type fuel derived from shale oil 902 microgram nitrogeng fuel and regular petroleum JP-5 fuel 3 microgram nitrogeng fuel. Nitrogen content of the fuel had no effect on engine performance. The carbon monoxide and unburned hydrocarbon emissions were equivalent for all the fuels included in the test program. For the engine power ratings tested, the oxides of nitrogen emissions increased with increasing nitrogen content of the test fuel. The conversion efficiency of fuel bound nitrogen to oxides of nitrogen appears to be independent of the nitrogen content of the fuel. Difficulties in measuring small changes in oxides of nitrogen level resulting from low nitrogen content fuels 50 microgram nitrogeng fuel or less caused the conversion efficiency to be very variable. The conversion efficiency for fuels with a nitrogen content of 250 microgram nitrogeng fuel or greater was approximately 45 percent. Author
- Jet and Gas Turbine Engines