Effect of biodiesel components on its lubrication performance

The composition of biodiesel significantly influences its lubrication performance. Gas chromatography, high frequency reciprocating friction, and wear test machines were used to determine the composition and abrasive spot diameter of biodiesels produced from fourteen different oil feedstocks. At the same time, the relationship between the grinding point diameter and chemical composition of biodiesel was quantified. The main components of the biodiesel are methyl stearate, methyl palmitate, methyl oleate, and methyl linoleate, with an average content of 92.18%. Among the various types of biodiesel, rubber seed methyl ester has a minimum grinding point diameter of 169.71 μm. Prickly ash methyl ester has the largest grinding point diameter of 187.35 μm. A linear correlation prediction model of wear point diameter was established (R = 0.91).