Characterization and analysis of diesel exhaust odor
An instrumental method known as the Diesel Odor Analysis System or DOAS, has been developed at A.D. Little, Inc. for measuring diesel exhaust odor. It was of interest to determine which compound or compounds in the oxygenated fraction of the exhaust were primarily responsible for the odor correlation as developed at A.D. Little, Inc. This was accomplished by observing how the measurement of the exhaust odor intensity and number of chemical constituents of the oxygenate fraction were changing with respect to the odor values as measured by the DOAS. Benzaldehyde was found to give the best correlation (R = 0.98) with odor. A quantitative relationship between exhaust odor as measured by the total intensity of aroma (TIA) and the benzaldehyde concentration (B) in ppm in the exhaust is given by: TIA = 1.11 log/sub 10/(B) + 4.10. This correlation was supported by results obtained from two other diesel engine exhaust sources. A methyl benzaldehyde isomer also yielded a good correlation (R = 0.90) with odor. Air to fuel ratio correlations were determined for the tentatively identified compounds, cinnamaldehyde (R = 0.94) and a C2-benzaldehyde isomer (R = 0.94).
- OSTI ID:
- 6139225
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EXHAUST GASES
CHEMICAL COMPOSITION
ODOR
AIR POLLUTION
BENZALDEHYDE
CORRELATIONS
DIESEL ENGINES
GAS CHROMATOGRAPHY
MEASURING METHODS
QUANTITY RATIO
ALDEHYDES
CHROMATOGRAPHY
ENGINES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
ORGANIC COMPOUNDS
ORGANOLEPTIC PROPERTIES
POLLUTION
SEPARATION PROCESSES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)