An Improved Method for Determining the Hydrocarbon Fraction of Diesel Particulates by Vacuum Oven Sublimation

Halsall, Robert; McMillan, Michael L.; Schwartz, Benjamin J.

doi:10.4271/872136

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…Organic Carbon and Elemental Carbon. There are several commonly used particle characterization methods: solvent extraction of SOF (25); vacuum oven sublimation for determining total, solid, and volatile particulate mass (26); and thermogravimetric analysis (27). In this study, a multiphase carbon determinator (RC-412, Leco) was employed to determine an organic carbon fraction and an elemental carbon fraction.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Particles from a Current Technology Heavy-Duty Diesel Engine

Shi

Mark

Harrison

2000

Environ. Sci. Technol.

182

111

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The physical properties, chemical properties, and morphology of particles from a current technology diesel engine run under steady-state conditions were determined during five campaigns across three calendar years. Concentrations of particulate matter, NO x , HC, CO, and CO 2 measured at a fixed sampling position were found to be repeatable between different campaigns. However, particle size distributions and number concentrations were significantly affected by dilution conditions. Particle density, estimated using a volume size distribution estimated from an ELPI together with measured mass, was found to be below 1 g/cm 3 at nonzero loads, but this is explained by an overestimation of volume by the ELPI due to particle fractal properties. Particle phase SO 4 2-, NO 3 -, PAH, organic carbon, and elemental carbon were found to vary with engine operating modes. Particles emitted from a modern diesel engine had similar cluster structures to those from old engines but consisted of smaller basic particles when analyzed with a TEM. A semivolatile liquid fraction was not normally visible in the TEM but was seen when trapped within a folded carbon film. Very fine (<10 nm) single particles were observed in diluted exhaust by TEM and confirmed by SMPS.

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Section: Resultsmentioning

confidence: 99%

Characterization of Particles from a Current Technology Heavy-Duty Diesel Engine

Shi

Mark

Harrison

2000

Environ. Sci. Technol.

182

111

View full text Add to dashboard Cite

show abstract

“…The residual that consists primarily of solid carbon and non-volatile ash is weighed. The volatile portion, which contains the adsorbed and condensed unbumed hydrocarbons and sulfuric acid, is determined by the difference in the mass of the sample [36,37].…”

Section: Figure 21 Typical Diesel Particulate Compositionmentioning

confidence: 99%

Determination of Particulate and Unburned Hydrocarbon Emissions from Diesel Engines Fueled with Biodiesel

Chang¹,

Gerpen²

1998

SAE Technical Paper Series

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“…High unbumed hydrocarbon concentration is the condition where condensation is likely to be significant, and the HCs that are most likely to condense are those with the lowest volatility. [36,37].…”

Section: Figure 21 Typical Diesel Particulate Compositionmentioning

confidence: 99%

Determination of particulate and unburned hydrocarbon emissions from diesel engines fueled with biodiesel

Chang

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An Improved Method for Determining the Hydrocarbon Fraction of Diesel Particulates by Vacuum Oven Sublimation

Cited by 10 publications

References 6 publications

Characterization of Particles from a Current Technology Heavy-Duty Diesel Engine

Characterization of Particles from a Current Technology Heavy-Duty Diesel Engine

Determination of Particulate and Unburned Hydrocarbon Emissions from Diesel Engines Fueled with Biodiesel

Determination of particulate and unburned hydrocarbon emissions from diesel engines fueled with biodiesel

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