Biodiesel produces up to 72% less carbon dioxide than mineral diesel
Biodiesel is the only alternative fuel to have completed the health effects test required by the Clean Air Act.
By using biodiesel sulphur emissions are essentially eliminated with. The exhaust emissions of sulphur oxides and sulphates (major components of acid rain) from biodiesel are effectively eliminated compared to sulphur oxides and sulphates from diesel.
Carbon Monoxide - The exhaust emissions of carbon monoxide (a poisonous gas) from biodiesel are on average 47% lower than carbon monoxide emissions from mineral diesel.
The overall ozone (smog) forming potential of biodiesel is less than mineral diesel fuel. The ozone forming potential of hydrocarbon emissions is nearly 50% less than that measured for mineral diesel fuel.
Biodiesel reduces the health risks associated with mineral diesel. Biodiesel emissions showed decreased levels of PAH and nitrated PAH compounds which have been identified as potential cancer causing compounds. In recent testing, PAH compounds were reduced by 75 to 85%, with the exception of benzo(a)anthracene, which was reduced by roughly 50%. Targeted nPAH compounds were also reduced dramatically with biodiesel fuel, with 2-nitrofluorene and 1 -nitropyrene reduced by 90%, and the rest of the nPAH compounds reduced to only trace levels.
Biodiesel is a biodegradable energy source. Some crops grown to produce biodiesel actually enrich the soil as they grow.
The use of biodiesel can be carbon neutral and if the original feedstock was produced from part or entirely from waste material can also have a dramatic positive impact on the environment in terms of waste.
Originally the lubricity of diesel fuel was sufficient to provide the protection needed to maintain adequate performance. From 1993 the composition of diesel fuel has changed to achieve lower sulphur levels. By doing so this has reduced the lubricity of the fuel. By using biodiesel the correct levels of lubricity are maintained.