Biodiesel: Effects on Exhaust Constituents

  • Joseph McDonald
  • Matthew W. Spears


Fatty-acid mono-ester fuels, commonly referred to as “Biodiesel” fuels, are currently under evaluation for use as an alternative diesel fuel in the United States. Blends of Biodiesel fuels with petroleum diesel fuel have been tested in a large number of urban bus transit demonstrations, and they are currently under consideration for commercial use in confined environments such as underground mines in the United States and Canada. The use of Biodiesel fuels, such as soy-and rapeseed-oil methyl esters, has been shown to significantly reduce emissions of the carbon-soot constituents of diesel particulate matter (PM), while increasing the emissions of soluble or volatile organic particulate matter. The use of Biodiesel fuels has also been shown to reduce the emissions of some PAH and nitro-PAH compounds. When used in conjunction with an appropriately selected diesel oxidation catalyst, significant reductions in total PM emissions from diesel engines have been realized. This paper will present a summary of recent work conducted in the United States to characterize the exhaust emissions of diesel engines using a soy-methyl-ester Biodiesel fuel, including the effects of the Biodiesel fuel on exhaust gas composition, PM composition, and particle-size distribution.


Diesel Engine Diesel Exhaust Exhaust Emission Diesel Oxidation Catalyst Diesel Particulate Matter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Joseph McDonald
    • 1
    • 2
  • Matthew W. Spears
    • 1
  1. 1.Center for Diesel ResearchUniversity of MinnesotaMinneapolisUSA
  2. 2.National Vehicle and Emissions Lab.U.S. Environmental Protection AgencyAnn ArborUSA

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