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Search Completed | Title | BIODIESEL EMISSIONS
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Text | BIODIESEL EMISSIONS | 001
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. A survey of the results, averaged with other major studies, is provided in the table below.
AVERAGE BIODIESEL EMISSIONS COMPARED TO CONVENTIONAL DIESEL
Total Unburned Hydrocarbons Carbon Monoxide
PAH (Polycyclic Aromatic Hydrocarbons)** nPAH (nitrated PAH’s)**
Ozone potential of speciated HC
-67% -48% -47% +10%
-100% -80% -90% -50%
-20% -12% -12% +2%
-20%* -13% -50%*** -10%
* Estimated from B100 result
** Average reduction across all compounds measured
*** 2-nitroflourine results were within test method variability
The overall ozone (smog) forming potential of biodiesel is less than diesel fuel. The ozone forming potential of the speciated hydrocarbon emissions was nearly 50 percent less than that measured for diesel fuel.
Sulfur emissions are essentially eliminated with pure biodiesel. The exhaust emissions of sulfur oxides and sulfates (major components of acid rain) from biodiesel were essentially eliminated compared to sulfur oxides and sulfates from diesel.
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