Performance of a Bubble Column Reactor for the Non-Catalytic Methyl Esterification of Free Fatty Acids at Atmospheric Pressure
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概要
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A bubble column reactor has been developed to produce fatty acids methyl esters (biodiesel) by blowing superheated methanol continuously into vegetable oils without using any catalysts at atmospheric pressure. Two types of reactions exist in this method for methyl esters formation; transesterification of triglycerides and esterification of fatty acids. A kinetic study for the transesterification of triglyceride has been studied at 250–290°C. However, performance of the bubble column reactor for methyl esterifcation of free fatty acids has not yet been revealed. Therefore, we studied effects of reaction temperatures (200, 225, and 250°C) on the composition of reaction product, conversion of the reaction and the reaction rate constant under a semi-batch mode of operation with oleic acids as free fatty acids. The activation energy and the frequency factor values of the methyl esterification reaction obtained in this experiment were 24.8 kJ/mol and 2.9, respectively. Compared with the obtained results of the transesterification of triglycerides, the reaction rate of methyl esterification of free fatty acids at the same reaction temperature (250°C) was higher than the former, but the quality of the product (the methyl ester content in the gaseous product) was lower.
- 2007-09-01
著者
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Sagara Yasuyuki
Department Of Global Agricultural Science Graduate School Of Agricultural And Life Sciences The Univ
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Sagara Yasuyuki
Department Of Global Agricultural Sciences The University Of Tokyo
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Nabetani Hiroshi
Food Engineering Division National Food Research Institute
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Hagiwara Shoji
Food Engineering Division National Food Research Institute Naro
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Hagiwara Shoji
Food Engineering Division National Food Research Institute
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SOERAWIDJAYA Tatang
Department of Chemical Engineering, Institut Teknologi Bandung
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TAMBUNAN Armansyah
Graduate School, Agricultural Engineering Science, Bogor Agricultural University, Darmaga Campus
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ABDULLAH Kamaruddin
Graduate School, Agricultural Engineering Science, Bogor Agricultural University, Darmaga Campus
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Tambunan Armansyah
Graduate School Agricultural Engineering Science Bogor Agricultural University Darmaga Campus
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Abdullah Kamaruddin
Graduate School Agricultural Engineering Science Bogor Agricultural University Darmaga Campus
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Soerawidjaya Tatang
Department Of Chemical Engineering Institut Teknologi Bandung
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SAGARA Yasuyuki
Department of Agricultural Engineering, Faculty of Agriculture, The University of Tokyo
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