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Title: Reducing Nox Exhaust Emissions On Existing Spark Ignited Integral Gas Engines
Author: John P. Ealy
Source: American Gas Association 1987
Year Published: 1987
Abstract: Exhaust emissions from stationary internal combustion gas engines have been subject to federal and/or local governmental regulations for over a decade. Each area of the Country can have dramatically different regulations governing exhaust emissions from new and/or existing engine-compressor installations. This discussion does not deal with specific environmental regulations or interpretation of these regulations. It concerns methods of reducing the primary pollutant on spark-ignited gas engines, Oxides of Nitrogen (NOx). These methods can be evaluated on a case-by-case basis by users confronted with specific environmental regulations. They can be implemented to reduce NOx emissions from existing compressor stations or existing surplus equipment being relocated to new or different locations. This presentation relates primarily to medium-large-bore, spark-ignited, slow-speed, four-stroke integral gas engine compressors. Many of the NOx reduction techniques discussed are also applicable to the broad category of gas engines, including two-stroke and highspeed engines.

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