Characterization and analysis of diesel exhaust odor

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6139225

Shala, F J

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
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ALDEHYDES
BENZALDEHYDE
CHEMICAL COMPOSITION
CHROMATOGRAPHY
CORRELATIONS
DIESEL ENGINES
ENGINES
EXHAUST GASES
FLUIDS
GAS CHROMATOGRAPHY
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING METHODS
ODOR
ORGANIC COMPOUNDS
ORGANOLEPTIC PROPERTIES
POLLUTION
QUANTITY RATIO
SEPARATION PROCESSES
WASTES