Optimization of Biodiesel Production from Waste Cooking Oil in Present of Polyoxometalate as Catalyst Via Electrolysis Method Based on Response Surface Methodology (RSM)

Today, due to emission of toxic and green gases from the combustion of fossil fuel, science look for renewable and eco-friendly fuels that biodiesel is kind of green fuel and has all properties. In these study, the biodiesel produced from waste cooking oil using phophomolybdic acid (H3PMo12O40). In order to optimize esterification reaction via electrolysis method response surface methodology based on central composite (RSM-CCD) was used. The effect of three main factors of catalyst weight (wt%), methanol to oil molar ratio and time (h) was investigated and all experimental runs were performed at constant electric voltage (10 V) and room temperature. The highest biodiesel yield in the present of 3.58 wt% catalyst, 7.84:1 at 8.24 h were 94.42%. the produced biodiesel in accordance with the ASTM standard. A value of R2=0.9933 indicates that the predicted model sufficient accuracy to estimate the parameters participating in the reaction. Also, the high activity of phosphomolybdic acid catalyst has made it a suitable option for biodiesel production on an industrial scale.