PR-179-18203-R01 Experimental Evaluation of Stack Testing Methods for Accurate VOC Measurement

Volatile organic compounds (VOCs) are defined as non-methane, non-ethane hydrocarbons and have negative environmental effects, especially in the formation of ozone that creates smog. The combination of a gas chromatograph and a flame ionization detector can be implemented to quantify VOCs in engine exhaust following EPA Method 18/25A. The Fourier Transform Infrared Spectrometer can also be used to quantify VOCs in engine exhaust gas, following EPA Method 320. In this work testing and data analysis are performed with both measurement methods on multiple analyzers utilizing different engine types, conditions, and fuel quality. The accuracy of the measurement methods and data analysis approaches are compared and evaluated.