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The potential of restaurant trap grease as biodiesel feedstock
Author(s)
Hasuntree, Parichart
Toomthong, Vichuta
Yoschoch, Sukanda
Thawornchaisit, Usarat
Date Issued
January 1, 2011
Type
Article
Abstract
The possibility of using restaurant trap grease as feedstock in the production of biodiesel via acid catalyzed esterification is explored in this study. Sulfuric acid was used as a catalyst for the esterification reaction of free fatty acid (FFA) and methanol. The FFA levels of restaurant trap greases were reduced from 60.38±2.22 mg KOH/g to 11.60±1.60 mgKOH/g when conditions for biodiesel production are as follow: methanol-to-FFA ratio of 5:1, 5 wt.% H2SO4, and a reaction temperature at 60°C with a reaction time of 60 min. During the acid-catalyzed esterification, the percentage of methyl esters resulting from conversion of FFA in the obtained product was 83.59±1.51% based on the result of 1H NMR analysis. Data obtained from the 23 full factorial designs revealed that methanol-to-FFA ratio term had the most significant effect on the percentage of methyl esters, followed by the H2SO4 concentration. Conversely, reaction time between 1 and 3 hours had no significant effect on the esterification of trap greases.
Citation
Songklanakarin Journal of Science and Technology, 33(5), 525-530, 2011