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Title of article :
Transesterification kinetics of palm olein oil using supercritical methanol
Author/Authors :
Choi، نويسنده , , Cheong-Song and Kim، نويسنده , , Jin-Woo and Jeong، نويسنده , , Cheol-Jin and Kim، نويسنده , , Huiyong and Yoo، نويسنده , , Ki-Pung، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
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Abstract :
Continuous transesterification of palm olein oil using supercritical methanol was investigated in the absence of a catalyst. The variables studied were reaction temperature (270–350 °C), pressure (20–40 MPa), and residence time (5–25 min), with a methanol-to-oil molar ratio of 40. Preheating at 245 °C was used to form a homogeneous phase in the absence of thermal decomposition of palm olein oil. The activation energies and reaction activation volumes of the fatty acid methyl ester (FAME), and those of the individual components (C16:0, C18:0, C18:1, and C18:2 methyl esters), were calculated. The entropies of activation (ΔS‡) of the transesterification reactions were also obtained. As the transesterification of vegetable oil in supercritical methanol included a strongly negative (−175 J/mol K) entropy of activation, transesterification required harsh conditions.
Keywords :
Continuous transesterification , Supercritical methanol , Kinetics , Palm olein oil , Entropy of activation
Journal title :
Journal of Supercritical Fluids
Journal title :
Journal of Supercritical Fluids
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Link To Document :