Fuels containing chemically bound nitrogen were burned in a 6-in-dia gas turbine combustor and the NOx production was correlated to the nitrogen content of the fuel over a range of air equivalence ratios. The bound nitrogen content varied from 0.0079 percent (79 ppm) to 0.79 percent by weight. Inlet air temperatures of 200 and 600 F were used and outlet temperatures were varied from 1100 to 1800 F. Exhaust gases were continuously monitored and the CO, CO2, NO, and hydrocarbons were measured. The NO, normalized NO, CO, hydrocarbon concentrations and per cent conversion versus combustor outlet temperature are presented. Also, results from a diesel oil containing 0.13 percent artificially added nitrogen were compared to those from a crude oil having 0.13 percent naturally occurring nitrogen.

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