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This research aims to study the use of ashes from biomass as a catalysis in the production of biodiesel. By applying wood ashes to make repeated burning of longan at ambient temperature more than 800 degrees Celsius. So the ashes have more purity. Then apply as a catalysis in the production of biodiesel from oil and the cake coming as raw material for biodiesel production. The trial is divided into 5 experiment is using the same quantity of oil, 200 ml every experiment and use potassium hydroxide ratio (grams): Ash (g): Methanol (ML), respectively, as follows: 0, 0: 45: 1.21: 10: 45, 2: 40: 2.2, 2.5: 1: 45 (wash the ashes 1 gram) and 2.5: 1.35: 45. Then bring the biodiesel production to properties measuring whether there is a value closest to biodiesel basics or not. Study results showed that the ashes could be used as a direct catalytic biodiesel production. But come the ashes mixed with potassium hydroxide in the manner the principal catalyst for biodiesel production. Where the ashes are stalling in Transesterification reactor eutrophication. Making biodiesel, which has properties similar to the standard biodiesel, but it cannot be actually works because there are also the fatty acid biodiesel produced. Moreover, in the ashes also have high pH values. Making biodiesel is a high-precision bass accordingly. Researchers believe that the political commitment of the longan wood ashes are not effective enough to lead to a catalytic in biodiesel production. But it can be applied to reduce the acid in biodiesel, with the appropriate values.

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.

The purpose of this research is to study the use of ashes from biomass as catalysts in biodiesel production The wood ash longan were burned repeatedly over temperature 800 degrees Celsius.And then used as a catalyst in the production of biodiesel. Application of oil and waste from fry potatoes as raw material in the production of biodiesel. The experiment is divided into 5 experiment is to use the oil quantity 200 mlAnd use ratio of potassium hydroxide (g):Ashes (g): methanol (ML), respectively 1.21: 0: 45 0: 10:,, 45 2.2: 2: 40 2.5:, 1: 45 (wash with ashes 1 g). And the 2.5: 1.35:45 the biodiesel production to measure the properties that is similar to the basic or biodiesel study. Ash can not be used as a catalyst directly in biodiesel production.The ashes that slow reaction trans esterification. Making biodiesel have qualified close to biodiesel standard. But can not be used to actually works.The ashes are also the pH high making biodiesel had a high base along the researcher that Wood ash tree that was not effective enough to be a catalyst in the production of biodiesel.