Chemical Kinetic Study of Nitrogen Oxides Formation Trends in Biodiesel Combustion

• Main Authors: Junfeng Yang, Valeri I. Golovitchev, Pau Redón Lurbe, J. Javier López Sánchez
• Format: Article
• Language: English
• Published: Hindawi Limited 2012-01-01
• Series: International Journal of Chemical Engineering
• Online Access: http://dx.doi.org/10.1155/2012/898742

The use of biodiesel in conventional diesel engines results in increased NOx emissions; this presents a barrier to the widespread use of biodiesel. The origins of this phenomenon were investigated using the chemical kinetics simulation tool: CHEMKIN-2 and the CFD KIVA3V code, which was modified to account for the physical properties of biodiesel and to incorporate semidetailed mechanisms for its combustion and the formation of emissions. Parametric ϕ-T maps and 3D engine simulations were used to assess the impact of using oxygen-containing fuels on the rate of NO formation. It was found that using oxygen-containing fuels allows more O2 molecules to present in the engine cylinder during the combustion of biodiesel, and this may be the cause of the observed increase in NO emissions.