Author : Dinesh S. Nichat and D.B.Shelke

Bio diesel is renewable source of energy, non-degradable, cleaner and efficient fuel for IC Engines. Conventionally it is produced by the alkali as a catalysis but due to more FFA contents in oils the Acid catalysis method is becoming popular for researchers. In this research work the productivity of different acids are evaluated for different concentrations of Acids, methanol, catalysts for constant temperature and time is to measure. The optimum combination Via Hydrochloric Acid and methanol /pretreated soybean oil, Acid concentration and time wise are calculated 0.16, 1% and 28 min.which gives yield up to 81% which meets ASTM fuel requirements. The optimum combination via nitric Acid for methanol and soybean as a pretreated oil, Acid concentration and Time wise is 0.20, 1.25% and 50 min.which gives yield up to 92.734% which meets ASTM fuel requirements. Optimum combination via sulfuric acid for methanol /Pretreated oil, Acid concentration and Time wise is 0.20, 1.5% and 24 min, which gives yield up to 99.009% which meets ASTM fuel requirement.

Keywords: Biodiesel, Acid Catalyst, Transesterification