Biodiesel can be produced from vegetable oils or animal fats with alcohol, the reaction is Transesterification using a base and acid catalysts is a product alkyl esters or biodiesel as shown in Figure 1 Products of the reaction include not only biodiesel, but also byproducts such as glycerol, soap, excess alcohol, and trace amounts of water. All of these byproducts must be removed to meet the standards, but the order of removal is process-dependent. conventional catalytic processes cannot make an efficient manner without additional pretreatment steps, because of the presence of high amounts of free fatty acids (FFAs) and water that react with the catalyst