Clean Energy for Sustainable Development

17.5. Analysis of Physicochemical Properties

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/m³), kinematic viscosity (mm²/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 ...