ABSTRACT
An important property of biodiesel is its ability to reduce total particulate emissions from an engine. Particulate emissions are defined by the EPA as condensed or solid material collected on an appropriate filter at a temperature ≤ 52°C. Particulate matter thus includes soot carbon, fuel and lubricating oil derivatives, and sulfuric acid aerosols. Particulate matter is often fractionated in terms of sulfate, soluble organic fraction (SOF), or volatile organic fraction (VOF), and carbon or soot (1). Biodiesel can affect soot and fuel-based SOF but not lubricating oil-based SOF.
