A dilution source sampling system has been incorporated into the exhaust measurement system of a research single-cylinder diesel engine. To allow more detailed assessment of the individual chemical components of the diesel particulate matter (PM) the exhaust dilution system includes a residence time chamber (RTC) to allow for residence times of 30 to 60 seconds in the second stage of dilution before sampling.Samples are collected on a range of different filters where mass loading, elemental and organic carbon (ECOC), trace metals, sulfate ions (SO4), particle-phase organic compounds, and semi-volatile organic compounds are evaluated. In addition, particle size distributions have been determined using a scanning mobility particle sizer (SMPS).Results show that the chemical composition of the particulate matter is highly dependent on the engine operating conditions. There is a dramatic shift in the ratio of elemental carbon to organic compounds and in the sulfate ions (SO4) and trace metals when the engine is traversed across a load and speed range. Similarly there is a shift in the particle size range for which there is virtually no impact on the mass loading.
Detailed Chemical Composition and Particle Size Assessment of Diesel Engine Exhaust
Sae Technical Papers
SAE Powertrain & Fluid Systems Conference & Exhibition ; 2002
2002-10-21
Conference paper
English
Detailed Chemical Composition and Particle Size Assessment of Diesel Engine Exhaust
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