Density of palm oil-based methyl ester

Biodiesel density data as a function of temperature is needed to model the combustion process. In this work, the density and specific gravity of pure palm oil-based methyl ester biodiesel was measured at various temperatures from (15 to 90) degrees C. The data obtained was validated with Janarthanan empirical equation and the method proposed by Spencer and Danner using a rnodified Rackett equation. The experimental and estimated density values using the rnodified Rackett equation gave almost identical values with differences less than 0.03 %. The Janarthanan empirical equation performs equally with diffrences within 0.03 %. A simple linear equation for density is also proposed in this work.