Physical-chemical characterization of kanyu almond oil (Sclerocarya birrea) for use as biofuel

Abstract

Plant oil extracted from Kanyu almonds offers the potential to be an alternative to fossil fuel resources. This study aims to characterize the physico-chemical properties of kanyu almond oil, as safe indicators of the use of this biofuel for energy generators. Samples of the oils examined were density, kinematic viscosity, acid value, and oxidation stability. The experimental results showed that the oils had different sensitivities from the properties and indicate a clear deterioration of the kinematic viscosity and oxidation stability. These results were not in a condition to be used directly, such as fuels in diesel engines. Also, oil cannot be used immediately for feeding because it contains a high acid value. However, with the refining process, its kinematic viscosity and acid value can be improved, and can thus be used as biofuel and for other purposes. Key words: Kinematic viscosity, Induction time, Acid value, and Kanyu (Marula).