Biodiesel production from olive pomace

Author(s): Nezihe Ayas, Tuba Elcin Cetin, Senay Ongoren, Zeynep Dincer
Eskişehir Technical University, Faculty of Engineering, Department of Chemical Engineering, 2 Eylul Campus, 26555, Eskişehir, Turkey
International Journal of Smart Grid and Clean Energy, vol. 8, no. 3, May 2019: pp. 320-324
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.8.3.320-324

Abstract: Within the scope of this research, biodiesel production from olive pomace oil (OPO) was investigated. Esterification and transesterification reactions were carried out using a microwave synthesis unit in the presence of H2SO4 and KOH as a catalyst, respectively. The acidity index (AI) of the oil was reduced from 20 to 0.78 mg KOH/g oil by an esterification reaction to avoid saponification during the transesterification process. Suitable esterification reaction parameters were determined as 65°C, for 40 minutes with a methanol:oil molar ratio of 8:1 in the presence of 2.5% (wt. %) catalyst (H2SO4). The highest fatty acid methyl ester (FAME) content of the biodiesel (98.56%) was determined by the transesterification at 65°C for 5 min, using a 7:1 methanol:oil molar ratio, and 1.5 wt. % KOH catalyst. Found results are consistent with the EN14214 standard.

Keywords: Olive pomace, olive pomace oil, esterification, transesterification, biodiesel, microwave synthesis unit
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