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Air Toxics Emissions Characteristics and Predictive Formaldehyde Emissions Model Performance for Natural Gas-Fired 2-Stroke, Reciprocating Engines Used in Gas Transmission
This paper presents preliminary results of an ongoing research program conducted by the Gas Research Institute (GRI) to evaluate and characterize formaldehyde emissions from internal combustion (IC) engines in the natural gas industry. The objective of this research is to provide the gas industry with the data/tools to estimate formaldehyde emissions from IC engines to determine major source applicability in response to the upcoming maximum achievable control technology (MACT)-based rule for stationary IC engines. As part of this program, extensive parametric test data have been collected using extractive Fourier Transform Infrared (FTIR) spectroscopy on five 2-stroke engines used in gas transmission. These include engines equipped with pre-combustion chamber (PCC) technology used for NOx emissions control. Engine parameters varied include torque, speed, ignition timing, and air manifold temperature/pressure.
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