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Pre-esterification of Jatropha curcas L.seed oil with high acid value catalyzed by heteropolyacid for biodiesel production
  
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KeyWord:heteropolyacid  pre-esterification  Jatropha curcas L.seed oil  biodiesel
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ZHANG Linye  
LI Zhiye  
WEI Guangtao,etc  
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Abstract:
      The pre-esterification of Jatropha curcas L.seed oil with high acid value catalyzed by heteropolyacid H3PW12O40 was studied to explore the green technology of pre-esterification for biodiesel production. The effects of different factors on esterification rate were investigated by single factor experiment, and the optimal pre-esterification conditions were obtained as follows: H3PW12O40 dosage 1%, reaction temperature 65 ℃ , reaction time 3 h, molar ratio of methanol to oil 9∶1. Under the optimal conditions, the esterification rate of Jatropha curcas L.seed oil reached 96.1%, and the acid value decreased to 0.61 mgKOH/g. Moreover, the process of pre-esterification of Jatropha curcas L. seed oil with high acid value catalyzed by heteropolyacid for biodiesel production was putforward, and the analysis showed that the process had some advantages.
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