Formaldehyde Emissions Prediction for 2-Stroke, Reciprocating Internal Combustion Engines in the Gas Transmission Industry
This paper presents 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. Since previous work has indicated that formaldehyde emissions can vary for IC engines, the objective of this research is to provide the gas industry with a predictive tool based on engine design and operating parameters to estimate formaldehyde emissions from IC engines to determine major source applicability. This need is driven by the U.S. EPA's upcoming maximum achievable control technology (MACT)-based rule for stationary IC engines. As part of this program, extensive parametric test data has been collected using Fourier Transform Infrared (FTIR) spectroscopy on a number of 2-stroke engines representing different design characteristics, such as large and small bore; turbocharged, piston, and blower-scavenged air deliver; range of compression ratio and BMEP and range of rated speed.