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Publikasi Ilmiah Dosen


IN SITU TRANSESTERIFICATION OF STERCULIA SEEDS TO PRODUCTION BIODIESEL


Yoel Pasae and Lydia Melawaty

Sterculia seeds is one of potential sources of vegetable oil. Oil from the sterculia seeds not classified as a food oil even though it contains highly unsaturated fatty acids. The main constituent fatty acids in the sterculia oil are sterculic acid.  The existence of very large sterculic acids in the sterculia oil affect characteristics that are sensitive to heat. Therefore, to take advantage of this sterculia oil as raw material for biodiesel production, it is necessary to study the conversion of oil into biodiesel directly from the seeds. In this study the oil extraction process has been carried out simultaneously with the transesterification process in one unit in-situ transesterification, in order to shorten the stages of biodiesel production while maintaining the characteristics of the unsaturated fatty acids in the sterculia oil which then become the raw material transesterification reaction. Base on this research we can conclude that in-situ transesterification can be performed to

convert the oil in sterculai seeds into biodiesel without oil extraction in advance, with product properties acid number in the range 1.064 -1.283, mg KOH / g sample, saponification numbers in the range 149.95-157.13 mg KOH / g sample, iodine numbers in the range 1275-6298, g I2 / 100 g sample and the viscosity in the range of 0.036 to 0.026.

Keywords: in-situ transesterification, biodiesel, sterculia seeds.

Link : http://www.arpnjournals.org/jeas/research_papers/rp_2016/jeas_0116_3382.pdf

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Dr. Ir. Josefine E. Latupeirissa, M.T.
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