A comparison of exhaust pipe, dilution tunnel and roadside diesel particulate SOF and gaseous hydrocarbon emissions
The solvent organic fraction (SOF) of particulates from the exhaust pipe of a diesel engine, a dilution tunnel and a roadside sample are compared. Three different techniques of SOF analysis are also compared, vacuum oven, solvent extraction and pyroprobe/GC. Gaseous hydrocarbons and the methane contribution were measured in the exhaust pipe throughout the speed and load range of the engine at 185 C and 2 C. The unburnt hydrocarbons decreased with air/fuel ratio for all speeds and there was an overall decrease in emissions with increasing speed. The differential temperature technique showed the maximum mass of hydrocarbon which could condense from the gas phase onto the particulate as the SOF. The method compared well with the actual SOF of the tunnel particulate. Detailed examination of the SOF showed the exhaust pipe particulate SOF was composed of n-alkanes from C16 to C25, the dilution tunnel sample showed condensation of lower molecular weight hydrocarbons from the gas phase onto the particulate.
- OSTI ID:
- 6760911
- Report Number(s):
- CONF-880241-
- Resource Relation:
- Conference: Society of Automotive Engineers international congress and exposition, Detroit, MI, USA, 29 Feb 1988; Other Information: Technical Paper 880351
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
DIESEL FUELS
EMISSION
EXHAUST GASES
GAS ANALYSIS
PARTICULATES
AIR POLLUTION MONITORING
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
DILUTION
GAS CHROMATOGRAPHY
HYDROCARBONS
POLLUTANTS
QUANTITATIVE CHEMICAL ANALYSIS
TESTING
CHEMICAL ANALYSIS
CHROMATOGRAPHY
FLUIDS
GASEOUS WASTES
GASES
KINETICS
ORGANIC COMPOUNDS
PARTICLES
PETROLEUM PRODUCTS
REACTION KINETICS
SEPARATION PROCESSES
WASTES
330102* - Internal Combustion Engines- Diesel
330705 - Emission Control- Particulates
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)