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Show / / - 1' MEASUREMENT OF AIR TOXICS IN ENGINE EXHAUST USING FOURIER TRANSFORM INFRARED (FI1R) SPECTROSCOPY Jeffrey P. LaCosse, Larry D. Ogle, and Gunseli Sagun Shareef Radian Corporation P.O. Box 13000 Research Triangle Park, North Carolina 27709 James M. McCarthy and James M. Evans Gas Research Institute 8600 West Bryn Mawr Avenue Chicago, Illinois 60631 ABSTRACf In response to the 1990 Clean Air Act Amendments, the Gas Research Institute (GRI) is investigating emissions of air toxics from natural gas industry sources. Included in this effort are measurements from internal combustion engines, one of the source categories targeted by u.s. Environmental Protection Agency (EPA) for development of Maximum Achievable Control Technology (MAcr) based regulations by the year 2000. Formaldehyde and other aldehydes are the air toxics potentially present in engine exhaust. Since there were no EPA-valida ted measurement methods available for quantifying aldehydes, GRI initiated a test to validate an extractive Fourier Transform Infrared (FTIR) method for measurement of these species according to EPA Method 301 -- Field Validation of Pollutant Measurement Methods for Various Media. In addition to formaldehyde, acetaldehyde and acrolein, other compounds (i.e., oxides of nitrogen, carbon monoxide, carbon dioxide, and moisture) were also validated because FTIR is capable of measuring multiple species on a continuous and realtime basis. The results of this validation testing have been reviewed by EPA, and in a July 21, 1995 letter from EPA, the method has been approved for gas-fired equipment. |
