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Aerosols and criteria gases in an underground mine that uses FAME biodiesel blends.

Authors
Bugarski-AD; Janisko-SJ; Cauda-EG; Patts-LD; Hummer-JA; Westover-C; Terrillion-T
Source
Ann Occup Hyg 2014 Oct; 58(8):971-982
NIOSHTIC No.
20044786
Abstract
The contribution of heavy-duty haulage trucks to the concentrations of aerosols and criteria gases in underground mine air and the physical properties of those aerosols were assessed for three fuel blends made with fatty acid methyl esters biodiesel and petroleum-based ultra-low-sulfur diesel (ULSD). The contributions of blends with 20, 50, and 57% of biodiesel as well as neat ULSD were assessed using a 30-ton truck operated over a simulated production cycle in an isolated zone of an operating underground metal mine. When fueled with the B20 (blend of biodiesel with ULSD with 20% of biodiesel content), B50 (blend of biodiesel with ULSD with 50% of biodiesel content), and B57 (blend of biodiesel with ULSD with 57% of biodiesel content) blends in place of ULSD, the truck's contribution to mass concentrations of elemental and total carbon was reduced by 20, 50, and 61%, respectively. Size distribution measurements showed that the aerosols produced by the engine fueled with these blends were characterized by smaller median electrical mobility diameter and lower peak concentrations than the aerosols produced by the same engine fueled with ULSD. The use of the blends resulted in number concentrations of aerosols that were 13-29% lower than those when ULSD was used. Depending on the content of biodiesel in the blends, the average reductions in the surface area concentrations of aerosol which could be deposited in the alveolar region of the lung (as measured by a nanoparticle surface area monitor) ranged between 6 and 37%. The use of blends also resulted in slight but measurable reductions in CO emissions, as well as an increase in NOX emissions. All of the above changes in concentrations and physical properties were found to be correlated with the proportion of biodiesel in the blends.
Keywords
Aerosols; Gases; Underground-mining; Physical-properties; Diesel-emissions; Diesel-exhausts; Diesel-engines; Metal-compounds; Metal-mining; Metallic-minerals; Fuels; Carbon-compounds; Nitrogen-oxides; Statistical-analysis; Author Keywords: alternative fuels; diesel aerosols; FAME biodiesel; nitrogen oxides; number concentrations; size distributions; underground mining
Contact
Aleksandar D. Bugarski, National Institute for Occupational Safety and Health, Office of Mine Safety and Health Research, 626 Cochrans Mill Road, Pittsburgh, PA 15236
CODEN
AOHYA3
Publication Date
20141001
Document Type
Journal Article
Email Address
abugarski@cdc.gov
Fiscal Year
2015
NTIS Accession No.
NTIS Price
Identifying No.
M082014
Issue of Publication
8
ISSN
0003-4878
NIOSH Division
OMSHR
Source Name
Annals of Occupational Hygiene
State
PA; NV
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