Comparison of fuel properties of biodiesels produced from different waste cooking oils

Abstract

In this study, it was investigated that the fuel properties of waste cooking oils by converting them to biodiesel and their suitability as diesel fuel according to these properties were investigated. However, differences in the separation or mixing of waste edible oils during collection are also presented. Waste cooking oils were obtained from cafeterias and dining hall kitchens in different regions of universities and serving different food product groups. Transesterification method was applied as a method of converting waste oils to biodiesel. Density, kinematic viscosity, flash point, cetane index, water content, calorific value and cold filter plugging point fuel properties of produced biodiesels were investigated. According to the results obtained, it has been revealed that the produced biodiesels comply with the standards, and because the fuel properties of the biodiesel produced from blended oils are within the standards, the waste cooking oils can be mixed during collection. Although the flow and cold flow properties and lower heating value of biodiesel produced with waste oil mixtures are disadvantageous compared to diesel fuel, the cetane index affecting combustion and the flash point value that emphasizes its safety are its important advantages. In addition, the fact that the water content of the produced fuels complies with the standards shows that the biodiesel production is successful and the results obtained can be used safely.