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Role of lubrication oil in particulate emissions from a hydrogen-powered internal combustion engine.

Authors
Miller-AL; Stipe-CB; Habjan-MC; Ahlstrand-GG
Source
Environ Sci Technol 2007 Oct; 41(19):6828-6835
NIOSHTIC No.
20032816
Abstract
Recent studies suggest that trace metals emitted by internal combustion engines are derived mainly from combustion of lubrication oil. This hypothesis was examined by investigation of the formation of particulate matter emitted from an internal combustion engine in the absence of fuel-derived soot. Emissions from a modified CAT 3304 diesel engine fueled with hydrogen gas were characterized. The role of organic carbon and metals from lubrication oil on particle formation was investigated under selected engine conditions. The engine produced exhaust aerosol with log normal-size distributions and particle concentrations between 10(5) and 10(7) cm(-3) with geometric mean diameters from 18 to 31 nm. The particles contained organic carbon, little or no elemental carbon, and a much larger percentage of metals than particles from diesel engines. The maximum total carbon emission rate was estimated at 1.08 g h(-1), which is much lower than the emission rate of the original diesel engine. There was also evidence that less volatile elements, such as iron, self-nucleated to form nanoparticles, some of which survive the coagulation process.
Keywords
Oils; Lubricating-oils; Particle-aerodynamics; Particulate-sampling-methods; Diesel-emissions; Gases; Exhaust-gases; Quantitative-analysis; Volatiles; Nanotechnology
Contact
Arthur Miller, NIOSH, Spokane, WA 99207
CODEN
ESTHAG
Publication Date
20071001
Document Type
Journal Article
Email Address
ALMiller@cdc.gov
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
19
ISSN
0013-936X
NIOSH Division
SRL
Source Name
Environmental Science and Technology
State
WA; MN
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