Gas-solid chromatographic analysis of automobile tailpipe emissions as a function of different engine and exhaust system modifications
- Univ. of Missouri, Rolla, MO (United States)
The authors developed a single, relatively short gas-solid chromatographic PLOT column and used it to separate aliphatic hydrocarbons, aromatic hydrocarbons and some inorganic gases (O{sub 2}, N{sub 2}, CO and CO{sub 2}) found in automobile exhaust. In the case of hydrocarbons, both aliphatic and aromatic components (up through alkylated-benzenes) were done in one run. Subambient temperature was needed for the oxygen-nitrogen separation, but they were easily resolved from each other and the other compounds present. The effects of different engine and exhaust system modifications on the level of compounds in the exhaust were tested. The concentrations of the emission gases varied considerably with changes in air/fuel ratio, coil voltage, use of catalytic converters and so forth. The results showed that the use of catalytic converter and a higher voltage coil tended to produce the most pronounced decreases in emissions of hydrocarbons and the catalytic converter produced the significant decrease in carbon monoxide concentrations. The results of the GSC analyses were compared to those of a commercial emission analyzer (i.e., sniffer). They showed similar trends and relative concentrations but somewhat different absolute concentrations. This may have been due to differences in the calibration of these methods.
- OSTI ID:
- 191740
- Report Number(s):
- CONF-941098-; TRN: 95:006733-0096
- Resource Relation:
- Conference: FACSS XXI: 21st annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), St. Louis, MO (United States), 2-7 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of 21st annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies; PB: 257 p.
- Country of Publication:
- United States
- Language:
- English
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