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Received July 21, 2009
Accepted March 17, 2010
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Production and characterization of biodiesel from trap grease
Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea 1Guangzhou Institute of Energy Conversion, No.2 Nengyuan Rd, Wushan, Tianhe, Guangzhou 510-640, China
mjslee@kier.re.kr
Korean Journal of Chemical Engineering, November 2010, 27(6), 1791-1795(5), 10.1007/s11814-010-0297-1
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Abstract
The feasibility of the production of biodiesel from trap grease containing 51.5% free fatty acids (FFAs) was investigated. The esterification of FFAs by an acid catalyst followed by the transesterification of triglycerides by an alkali catalyst was examined. The esterification of trap grease by sulfuric acid as a homogeneous catalyst or by Amberlyst-15 as a heterogeneous catalyst was optimized through a response surface methodology. After the two-step esterification of trap grease by sulfuric acid, the acid value decreased from 102.9mg KOH/g to 2.75mg KOH/g. Through the transesterification by potassium hydroxide, fatty acid methyl ester (FAME) content reached 92.4%. Following the esterification of trap grease by Amberlyst-15, the acid value decreased to 3.23 mg KOH/g. With the transesterification by potassium hydroxide, FAME content increased to 94.1%. After the distillation of the produced biodiesel, FAME content increased_x000D_
again, to 97.6%. The oxidation stability of the trap grease biodiesel was 0.17 h, and its cold filter plugging point was 4 ℃. As the FAME content of the trap grease biodiesel satisfies the Korean Biodiesel Standard, the trap grease biodiesel seems to be applicable for use as an engine fuel after properties improvement.
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Foidl N, Foidl G, Sanchez M, Mittelbach M, Hackel S, Bioresour. Technol., 58(1), 77 (1996)
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Freedman B, Pryde EH, Mounts TL, JAOCS, 61, 1638 (1984)
Zhang Y, Dube MA, McLean DD, Kates M, Bioresour. Technol., 89(1), 1 (2003)
Wang ZM, Lee JS, Park JY, Wu CZ, Yuan ZH, Korean J. Chem. Eng., 25(4), 670 (2008)
Liu YJ, Lotero E, Goodwin JG, J. Catal., 243(2), 221 (2006)
de la Iglesia O, Mallada R, Menendez M, Coronas J, Chem. Eng. J., 131(1-3), 35 (2007)
Lilja J, Murzin DY, Salmi T, Aumo J, Maki-Arvela P, Sundell M, J. Mol. Catal. A: Chem., 182-183, 555 (2002)
Hou X, Qi Y, Qiao X, Wang G, Qin Z, Wang J, Korean J. Chem. Eng., 24(2), 311 (2007)
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Park JY, Wang ZM, Kim DK, Lee JS, Renew. Energy, 35, 614 (2010)
