Measurements are reported for a spark-ignited (SI) engine burning natural gas and three simulated biogas fuels (natural gas, and mixtures). Exhaust concentrations of CO, and unburned hydrocarbons, as well as brake power and brake specific energy consumption, were measured. Leaner mixtures, retarded spark timing and diluent addition yielded reduced emissions. reductions up to 50 percent were achieved at MBT timing through diluent addition. Reduced peak temperatures caused by diluent addition, lean conditions, and retarded spark timing reduced combustion quality slightly, as evidenced by small increases in CO and unburned hydrocarbons emissions.
Fuel Composition Effects on Emissions From a Spark-Ignited Engine Operated on Simulated Biogases
Contributed by the Internal Combustion Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division, June 1999; final revision received by the ASME Headquarters, August 31, 1999. Editor: H. D. Nelson.
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Midkiff, K. C., Bell , S. R., Rathnam , S., and Bhargava, S. (August 31, 1999). "Fuel Composition Effects on Emissions From a Spark-Ignited Engine Operated on Simulated Biogases ." ASME. J. Eng. Gas Turbines Power. January 2001; 123(1): 132–138. https://doi.org/10.1115/1.1338951
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