What are the emissions of Biodiesel in relation to Diesel?
Biodiesel reduces tailpipe particulate matter (PM), hydrocarbon (HC), and carbon monoxide (CO) emissions from most modern four stroke CI engines. In 2002, the US Environmental Protection Agency (EPA) released a comprehensive technical report of biodiesel emissions data that shows biodiesel use can reduce emissions of particulate matter by 47 percent when compared to petroleum diesel in unmodified diesel engines. The report also verified a 67 percent reduction in unburned hydrocarbons and a 48 percent reduction in carbon monoxide with pure biodiesel (B100). The use of B20 in a conventional diesel engine results in substantial reductions of unburned hydrocarbons (-20%), carbon monoxide (-12%) and particulate matter (-12%) when compared with emissions from diesel fuel. In addition, the exhaust emissions of sulfur oxides and sulfates (major components of acid rain) from biodiesel are essentially eliminated compared to diesel. Emissions of nitrogen oxides may increase slightly (+2%) dependi
