Solid superacid catalyzed fatty acid methyl esters production from acid oil

Yan Li, Xiao Dong Zhang, Li Sun, Min Xu, Wen Guang Zhou, Xiao Hui Liang

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


A solid superacid catalyst was evaluated for the production of fatty acid methyl esters (FAMEs) from acid oil containing about 60 wt.% free fatty acids. It was demonstrated that SO42 -/ZrO2-TiO2/La3+ was an effective catalyst for simultaneous transesterification and esterification. The optimization of reaction parameters was performed, showing that maximum yield of above 90% could be obtained under the conditions that molar ratio of alcohol/oil was 15:1, catalyst amount was 5 wt.%, temperature was 200 °C and duration was 2 h. The catalyst was finally recycled and utilized for five times repeatedly with little loss in activity. The final products purified by molecular distillation were detected by GC-MS. The content of FAMEs reached 96.24%.

Original languageEnglish (US)
Pages (from-to)2369-2373
Number of pages5
JournalApplied Energy
Issue number7
StatePublished - Jul 2010


  • Acid oil
  • Fatty acid methyl esters
  • Solid superacid catalyst

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