Development of an Ammonia/SCR NOx Reduction System For A Heavy Duty Natural Gas Engine

J. Walker; B. K. Speronello

doi:10.4271/921673

1992-09-01

Development of an Ammonia/SCR NOx Reduction System For A Heavy Duty Natural Gas Engine 921673

An exhaust gas after-treatment system was developed to reduce oxides of nitrogen (NOx) emissions from a heavy duty diesel derived natural gas engine. The goal of the project was to reduce NOx emissions by 80% with a minimum ammonia slip and without negatively impacting other exhaust emissions.

This system utilized a stationary source, commercially available Selective Catalytic Reduction (SCR) catalyst and an ammonia (NH₃) injection system developed during the course of this project to reduce the NOx emissions.

Preliminary results indicate that NOx emissions were reduced by over 80% during transient operation with an ammonia slip of less than 2 ppm. This system had little impact on other engine emissions and engine performance.

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Development of an Ammonia/SCR NOx Reduction System For A Heavy Duty Natural Gas Engine 921673

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