This research aims to study the ash from biomass as a catalyst in the production of biodiesel. By the longan wood ashes from burned over a temperature above 800 degrees Celsius to a purity of more ash. Then be used as a catalyst in the production of biodiesel. And the waste oil from frying potato as raw material in the production of biodiesel. This study is divided into five experimental volume of 200 ml of oil is used for all experiments. And the ratio Potassium hydroxide (g): Ash (g): methanol (mL) of the order of 1.21: 0: 45, 0: 10: 45, 2.2: 2: 40, 2.5: 1: 45 (Wash. ashy 1 g) and 2.5: 1.35: 45 Then the biodiesel production to measure properties that are similar to biodiesel based or not. The results showed that Ashes can not be used directly as a catalyst in the production of biodiesel. It can be mixed with a catalyst ashes Potassium hydroxide to produce biodiesel. The ash that is detrimental to the reaction of trans esterification Phil application. Making biodiesel is similar to biodiesel standards. But can be used practically. Because the fatty acids remain in biodiesel production. The ash has a high pH, making biodiesel has the bass is high as well. Therefore, the researchers Longan wood ashes, is not efficient enough to be used as a catalyst in the production of biodiesel. It can be used to reduce the acidity in the biodiesel to the optimal.
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