Biodiesel is one of the renewable and eco-friendly alternative fuel. Biodiesel as
bioenergy or biofuel is made of, both new and waste ones, vegetable oil that
belongs to mono alkyl ester or methyl ester group through esterification process.
The purposes of this study were: (1) To know the effect of amount of catalyst,
reaction time and reaction temperature on esterification process of biodiesel
making; (2) Determine the most influential variable of the variable; (3) To know
the optimum condition of the most influential variable on the esterification of
biodiesel production. From the results of this study can be concluded from three
variables that are the percentage of catalyst, reaction time and reaction
temperature in esterification process of biodiesel, the most influential variable in
the decrease of acid number (FFA) is reaction time. The optimum result is at 75
minutes esterification reaction time with the yield is 84.46%.