| Popis: |
The high national demand of 2.2 ×107 kL/year and nonrenewable of diesel fuel lead to a decrease in the diesel fuel reserve. Hence, biodiesel is required as an alternative to substitute diesel fuel or to be mixed in fuel. Reutealis trisperma seed can be the feedstock of biodiesel production since it has the high oil content and it is non-edible oilseed. Thus, it does not compete with the food industry. However, Reutealis trisperma oil had a high acid value. Hence, the conversion process of Reutealis trisperma oil into biodiesel should be conducted using the esterification method with an acid catalyst. In situ esterification of Reutealis trisperma oilseed was carried out by reacting Reutealis trisperma seed with catalyzed methanol. This oilseed had the oil content of (57.81 ± 3.85) % and high free fatty acid of 48.92 mg KOH⊕8g-1. The experimental design of 23 full factorial central composite design was employed to optimize reaction conditions. Optimum conditions included the ratio of methanol volume to seed weight of 7.28:1 ml/g, catalyst weight percent of 15.93%, and reaction temperature of 61.3°C were obtained. In these optimum conditions, the maximum yield of (44.26 ± 0.3) % and a minimum acid value of (0.24 ± 0.04) mg KOH/g were achieved. |
