Parametric Study on Methyl Ester Production from Two-Stage Base-Catalyzed Transesterification of Soybean Oil

Author : Garcia, Aries Fernan Mangubat
Major Adviser : Demafelis, Rex B.
Committee Members : Bambase Jr., Manolito E.; Dizon, Lisa Stephanie H.; Gatdula, Kristel M.
Year : 2017
Month : December
Type : Thesis
Degree: BS
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Biodiesel was produced as methyl ester via two-stage base-catalyzed transesterification of soybean oil with methanol at ambient temperature. The effects of first stage reaction time, second stage reaction time, and distribution of catalyst mixture between the stages were investigated using ANOVA at 5 % significance level. A maximum of 99.00 % FAME content of crude biodiesel was produced at the maximum levels of 45-minute first stage reaction time, 45-minute second stage reaction time, and 70:30 distribution ratio of the catalyst mixture. The %FFA at this condition was reduced to 0.0234 % ± 0.0017 % from 0.2857 % ± 0.0119 % of the oil feedstock. At the same conditions adjusted for one-stage transesterification (90-minute total reaction time), only 68.80 % ± 4.85 % FAME content was obtained. For the results of the parametric study, the first stage reaction time, interaction between second stage reaction time and distribution of catalyst mixture, and the interaction among the three factors significantly affects the FAME content of the crude biodiesel, with positive, negative, and positive effects, respectively.

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