The quality of biodiesel and its feedstocks must be expressed in terms of fuel properties, such as cetane number, calorific value (kJ/kg), density (kg/m
3), kinematic viscosity (mm
2/s), cloud and pour points (°C), flash point (°C), cold filter plugging point (°C), acid value (mg
KOH/g oil), ash content (%), copper corrosion, carbon residue, water content and sediment, sulfur content, glycerin (% m/m), phosphorus (mg/kg), and oxidation stability. The physical and chemical properties of biodiesel fuel basically depend on the type of feedstock and their fatty oil composition [
34,
45,
61]. The important physicochemical properties of the crude oils and their respective methyl esters are tested according to ...