ABSTRACT
Bio-diesel is a variety of ester-based oxygenated fuels derived from natural, renewable biological sources such as vegetable oils. The name indicates, use of this fuel in diesel engine alternate to diesel fuel. Bio-diesel operates in compression ignition engines like petroleum diesel thereby requiring no essential engine modifications. Bio-diesel is monoalkyl ester of long chain fatty acids produced from the transesterification reaction of vegetable oil with alcohol in the presence of catalyst and can be used as fuel. Bio-diesel is a fuel produced through the transesterification reaction between a triglyceride and an alcohol, typically methanol or ethanol using sodium hydroxide as catalyst. Sulphur content increases with the increase in the boiling range of the products. Sulphur content in oil is determined by chemical method. Sulphur is largely present in oil in the form of corrosive organic compounds.
