Since fossil fuels are becoming less and less accessible, the manufacturing of biofuels from diverse renewable sources is becoming more and more intriguing these days. Several characteristics that make biodiesel a more environmentally friendly fuel include its biodegradability, non-toxicity and reduced pollutant emissions. In the industrial manufacturing of biodiesel, the transesterification process is the most fundamental method. The purpose of this study is to evaluate the processes utilized to produce biodiesel from used cooking oil and various kinds of vegetable oils. Transesterification process is used to produce biodiesel by employing base catalysts (KOH). Among the various feed stock of vegetable oil, coconut oil, orange oil and Sesame seed oil which have different physicochemical characteristics making them a promising feedstock for biodiesel generation. The extracted biodiesel was characterized by acid value, density, viscosity and PH. The effect of type of catalyst and quantity of catalyst on the effectiveness of biodiesel fabrication has been examined
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