Kinetika Reaksi Transesterifikasi Minyak Biji Ketapang (Terminalia Catappa L) Pada Proses Produksi Metil Ester

Abstract

Study on the kinetics of the transesterification reaction of ketapang seeds oil (Terminalia catappa l) of methyl ester production processusing sokletation extraction have been carried out. The ketapang seeds oil had been dissolved and then the several gram of sample were solektated using petroleum benzene solvent. Extraction followed by distillation to obtain pure ketapang oil.The catalyst used in the manufacture of biodiesel is the KOH with catalyst concentration 0.5% b/b KOH / ketapang seed oil.The solvent used was methanol with molar ratio of ketapang seed oil was 6:1.The kinetics of the transesterification reaction studied by taking 50 ml samples of the three-neck flask with a time interval (10, 20, 30, 40, 50 and 60 min) at a temperature of 30 ° C and a stirring speed of 2140 rpm.Sample is poured in the bottles that had been poured of 50 ml of water and allowed to stand in a refrigerator at a temperature of 20° C for 24 hours.Methyl esters are then separated from the glycerol and water using a separating funnel and wash using a NaSO4 in order to in the water which still contained the methyl ester.Pure methyl esters then were analyzed by GCMS to determine the content of methyl ester and HNMR to calculate the kinetics transesterification reaction of ketapang seed oil to a temperature of 30 o C.The results showed that the ideal time to process for production of methyl ester for temperature 30o C is 60 min with the kinetics of the reaction on orde 2 that are the highest graphics and the equation transesterification reaction rate ketapang seed oil into methyl ester is

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