Fang-Chih Chang
The Instrument Center, National Cheng Kung University, Tainan, Taiwan
Ya-Nan Wang
The Experimental Forest, National Taiwan University, Nan-Tou, Taiwan \ School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
Ming-Hsun Chen
School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
Chun-Han Ko
School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan \ Bioenergy Research Center, National Taiwan University, Taipei, Taiwan
Pei-Jen Lu
Department of Chemical Engineering, Tatung University, Taipei, Taiwan
Jia-Ming Chern
Department of Chemical Engineering, Tatung University, Taipei, Taiwan
Chien-Hou Wu
Department of Biomed. Engr. & Env. Sci., National Tsing Hua Univ., Hsin-Chu, Taiwan
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http://dx.doi.org/10.3384/ecp1105787Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:12, p. 87-92
Published: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (print), 1650-3740 (online)
The tung oil and palm oil were subjected to enzymatic transesterification. Immobilized lipase (Novozyme 435) was used at 10 % w/v vs. oil. The reactions were conducted at 40oC to 60oC with methanol and ethanol at a molar ratio of 1:3 for 24 hours. Temperature was found critical for the conversion efficiencies. Under 55oC after 24 hour; the optimal conversions of tung oil and palm oil fatty acid methyl esters (FAMEs) were 48 % and 63 %. The optimal conversions for tung oil and palm oil fatty acid ethyl esters (FAEEs) at 50oC were 20 % and 55 % respectively at 50oC. It was found the effciencies of FAEEs conversion were lower than the ones of FAMEs conversion. It was found that the tung oil consisted of 80 % unsaturated fatty acids; and palm oil consisted by just over 50% saturated fatty acids; by contrast. The results showed that the fatty acid composition of oil could directly impact on the efficiencies of enzymatic transesterification. A numerical model was derived to describe the reaction in this two-phase system. It was found that fitted mass transfer coefficients and rate constants of the pseudo-steady-state second order reaction were consistent to experimental results.
