Biodiesel Resource

Burning B100 can increase NOx (Nitrous Oxide) emissions. This increase can be counteracted by the use of exhaust add-ons (like catalytic converters) and/or adjusting the engine timing.

"Adjustment of injection timing and engine operating temperature will result in these levels [of nitrogen oxides with biodiesel] being reduced below mineral diesel levels."

-- Dr. Kerr Walker, Scottish Agricultural College, 1994, in "Biodiesel from Rapeseed", Journal of the Royal Agricultural Society of England, Volume 155, p. 43-4.