Biodiesel Production by Trasesterification method review paper

The environmental concern and diminishing reserves of fossil fuels has increased the demand for the study of biodiesel production. Biodiesel has become more attractive recently because of its environmental benefits and the fact that it is made from renewable resources. Biodiesel is one of the most promising alternatives for fossil fuels. It can be made from various renewable sources, including recycled oil, and can be utilized in lieu of petroleum-based diesel. The cost of biodiesel, however, is the main hurdle to commercialization of the product. There are four primary ways to make biodiesel, direct use and blending, microemulsions, thermal cracking (pyrolysis) and transesterification. The most commonly used method is transesterification of vegetable oils and animal fats. The used cooking oils are used as raw material, adaption of continuous transesterification process with different catalyst like alkali, acid and enzyme. And recovery of high quality glycerol from biodiesel by-product (glycerol) is primary options to be considered to lower the cost of biodiesel.