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Modal Measurements of Some Important NMOG Species by FT-IR Spectroscopy
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Abstract
The EPA and the State of California are phasing in tighter emissions requirements for hydrocarbons. Designing emissions control systems to meet these standards requires detailed information of the composition of the exhaust stream. Of particular interest is the ability to determine non-methane organic gases (NMOG) to meet reactivity index (RI) specifications.
Fourier transform infrared (FT-IR) spectroscopy is a technique widely used to measure organic compounds. Many NMOG compounds have unique infrared signatures that can be speciated by FT-IR. Because FT-IR can analyze samples in real time, the effects of driving cycle events such as the cold start and acceleration modes may be studied.
This paper gives a brief overview of the new regulations being phased in for hydrocarbons, as well as the techniques currently used for these measurements. FT-IR instrumentation and sampling techniques for exhaust gas analysis are explained. A discussion of the different gases which may be analyzed by FT-IR is presented, with the gases divided into their functional groups. Finally, the capabilities and limitations of FT-IR will be summarized.
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Citation
Roberts, J. and Lowry, S., "Modal Measurements of Some Important NMOG Species by FT-IR Spectroscopy," SAE Technical Paper 940739, 1994, https://doi.org/10.4271/940739.Also In
References
- Carter W.P.L. Lowi, A. Jr. “ A Method for Evaluating the Atmospheric Ozone Impact of Actual Vehicle Emissions ,” SAE 900710 1990
- Siegl W.O. et al “ Improved Emissions Speciation Methodology for Phase II of the Auto/Oil Air Quality Improvement Research Program-Hydrocarbons and Oxygenates ,” SAE 930142 1993
- Leppard W.R. et al “ How Heavy Hydrocarbons in the Fuel Affect Exhaust Mass Emissions: Correlation of Fuel, Engine-Out, and Tailpipe Speciation-The Auto/Oil Air Quality Improvement Research Program, ” SAE 932725 1993
- Hoekman S.K. Jensen T.E. “ Methanol Vehicle Emissions Round Robin Test Program, ” SAE 932773 1993
- Butler J.W. et al “ On-Line Characterization of Vehicle Emissions by FT-IR and Mass Spectrometry, ” SAE 810429 1981
- Franzen J. et al “ Fast Multicomponent Exhaust Gas Analyzer for Motor Development Workplaces, ” SAE 930082 1993
- Herget W.F. et al “ Progress in the Prototype Development of a New Multicomponent Exhaust Gas Sampling and Analyzing System, ” SAE 840470 1984
- Hochmuth J.K. Mooney J.J. “ Catalytic Control of Emissions from M-85 Fueled Vehicles ,” SAE 930219 1993
- Shore P.R. deVries R.S. “ On-Line Hydrocarbon Speciation Using FT-IR and CI-MS ,” SAE 922246 1992
- Ambs J.L. McClure B.T. “ The Influence of Oxidation Catalysts on NO2 in Diesel Exhaust, ” SAE 932494 1993
- Gabele P.A. Knapp K.T. “ A Characterization of Emissions from an Earl Model Flexible-Fuel Vehicle, ” J. Air Waste Management Association 43 851 858
- Lipari F. “ Determination of Individual Hydrocarbons in Automobile Exhaust from Gasoline-, Methanol-, and Flexible-Fueled Vehicles, ” J. Chromatog. 503 51 68 1990
- Renner T.A. et al “ Effect of Olefin Carbon Number on Reactivity of Automotive Hydrocarbon Emissions, ” SAE 930371 1993
- Kroell M. et al “ Influence of Fuel Composition on NMOG-Emissions and Ozone Forming Potential, ” SAE 932676 1993