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Biodiesel is the first and
only alternative fuel to have a complete evaluation of
emission results and potential health effects submitted
to the U.S. Environmental Protection Agency (EPA) under
the Clean Air Act Section 211(b). These programs include
the most stringent emissions testing protocols ever
required by EPA for certification of fuels or fuel
additives. The data gathered complete the most thorough
inventory of the environmental and human health effects
attributes that current technology will allow.
EPA has surveyed the large body of biodiesel emissions
studies and averaged the Health Effects testing results
with other major studies. The results are seen in the
table below.
Average Biodiesel Emissions
Compared to Conventional Diesel, According to EPA
| Emission Type |
B100 |
B20 |
| Regulated |
|
|
Total Unburned Hydrocarbons
|
-67% |
-20% |
| Carbon Monoxide |
-48% |
-12% |
| Particulate Matter |
-47% |
-12% |
| Nox |
+10% |
+2% |
|
Non-Regulated |
|
|
| Sulfates |
-100% |
-20%* |
| PAH (Polycyclic Aromatic Hydrocarbons)** |
-80% |
-13% |
| nPAH (nitrated PAH’s)** |
-90% |
-50%*** |
Ozone potential of speciated HC
|
-50% |
-10% |
* Estimated from B100 result
** Average reduction across all compounds measured
*** 2-nitroflourine results were within test method
variability |
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