A comparison of exhaust pipe, dilution tunnel and roadside diesel particulate SOF and gaseous hydrocarbon emissions

Conference · Thu Dec 31 23:00:00 EST 1987

OSTI ID:6760911

Williams, P T; Abbass, M K; Tam, L P; Andrews, G E; Ng, K L; Bartle, K D

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-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330705 -- Emission Control-- Particulates
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHROMATOGRAPHY
DIESEL FUELS
DILUTION
EMISSION
EXHAUST GASES
FLUIDS
GAS ANALYSIS
GAS CHROMATOGRAPHY
GASEOUS WASTES
GASES
HYDROCARBONS
KINETICS
ORGANIC COMPOUNDS
PARTICLES
PARTICULATES
PETROLEUM PRODUCTS
POLLUTANTS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SEPARATION PROCESSES
TESTING
WASTES