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Document Number | 9785 |
|---|---|
Primary Title | Effects of Biodiesel Blends on Vehicle Emissions |
Author Name | McCormick, R.L.; Williams, A.; Ireland, J.; Brimhall, M.; Hayes, R.R. |
Author Affiliation | National Renewable Energy Laboratory, Golden, Colorado |
Published Date | 10/01/2006 |
Detailed Publish Date | October 2006 |
Page Count | 69 |
Document Type | REPORT |
Abstract | Biodiesel is a fuel-blending component produced from vegetable oils, animal fats, or waste grease by reaction with methanol or ethanol to produce methyl or ethyl esters. Engine dynamometer studies reviewed in a 2002 report from EPA show a 2% increase in oxides of nitrogen (NOx) emissinos for B20. This perceived small increase in NOx is leading some state regulatory agencies to consider banning the use of biodiesel. This study was a reassessment of the impact of B20 on NOx emissions. Based on the studies reviewed and new data reported in the present report, there does not appear to be a discrepancy between engine and chassis testing studies for the effect of B20 on NOx emissions. Individual engines may show NOx increasing or decreasing, but on average there appears to be no net effect, or at most a very small effect on the order of +/-0.5%. We have concluded, considering all the data available, that B20 has no net impact on NOx. |
Copyright Status | N - Not copyrighted, |
Document Owner | H |
