The rise of the petroleum prices in the world market and the
depletion of fossil resources have increased the interest in renewable
fuels. One of the renewable alternatives is vegetable oil fuel,
which is popularly known as biodiesel. Biodiesel is a renewable,
nontoxic, biodegradable, and eco-friendly fuel consisting of fatty
acid alkyl esters (FAAEs) obtained from renewable sources like
vegetable oils and animal fats [1–3]. Biodiesel is advantageous
than regular petroleum based diesel fuel in terms of sulfur content,
flash point, aromatic content, and cetane number [4]. The usage of
biodiesel can reduce the emissions of SOx, CO, particulate matter,
and hydrocarbons in the exhaust gas compared to the regular diesel
fuel [5,6].