Browse Publications Technical Papers 2003-01-1868
2003-05-19

Exhaust Emission Behavior of Mixed Fuels having Different Component Cetane Number and Boiling Point 2003-01-1868

To clarify the effect of fuel properties on diesel exhaust emissions, direct injection of two component fuels with approximately zero aromatic content and sulfur were attempted in a diesel engine. Fuels were prepared using paraffins having different cetane numbers and boiling points. Parameters considered are the Average Boiling Point (ABP) by volume and the difference of component characteristics for the same ABP. The results indicate that the trade off relation between NOx and particulate matter (PM) emissions depends significantly on ABP or density and is independent of the fuel component. On the other hand, components of the mixed fuels have significant influence on SOF and THC emissions. Fuels having higher amount of low boiling point components emit higher THC. Mixtures of low boiling point-high cetane number fuel and high boiling point-low cetane number fuel or fuel that contains normal paraffins only emit higher SOF. Therefore, fuel property is still more important in case of low soot operating conditions of DI diesel engines.

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