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) °C. The data obtained was validated with Janarthanan empirical equation and the method proposed by Spencer and Danner using a modified Rackett equation. The experimental and estimated density values using the modified 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.