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Received December 8, 2007
Accepted March 4, 2008
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Application of KF/MgO as a heterogeneous catalyst in the production of biodiesel from rapeseed oil
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P.R., China
Korean Journal of Chemical Engineering, September 2008, 25(5), 998-1003(6), 10.1007/s11814-008-0161-8
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Abstract
Biodiesel was synthesized from rapeseed oil by transesterification over Magnesium oxide loaded with KF. The catalytic activity strongly depends on the loading amount of KF and calcined temperature. We found that the reaction reached a 79.37% yield when the loading amount was at 35 wt% and calcined at 500 oC. The simply dried 30% KF/MgO at 80 oC was found to give equally good results from the catalyst calcined at 500 oC, avoiding the usual activation at high temperature. The catalysts were characterized by the Hammett indicator method, BET, TG/DTG, XRD, NMR, EDS, and FT-IR. According to the instrumental analysis, the activity in the transesterification probably belonged to coordinately unsaturated F. and liberation of hydroxide during preparation. The effects of methanol/oil ratio and catalyst amounts on the conversion were also studied in this paper.
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Clark JM, Goodman EM, Smith DK, Brown SJ, Miller JM, J. Chem. Sco., Chem. Commun., 657 (1986)
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