Two-step in situ biodiesel production from microalgae with high free fatty acid content

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• 作者：Tao Dong ; Jun Wang ; Chao Miao ; Yubin Zheng ; Shulin Chen ; ^{chens@wsu.edu}
• 关键词：Microalgae ; Esterification ; FAME ; Transesterification ; Two-step in situ process
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：136
• 期：Complete
• 页码：8-15
• 全文大小：1011 K

文摘

The yield of fatty acid methyl ester (FAME) from microalgae biomass is generally low via traditional extraction-conversion route due to the deficient solvent extraction. In this study a two-step in situ process was investigated to obtain a high FAME yield from microalgae biomass that had high free fatty acids (FFA) content. This was accomplished with a pre-esterification process using heterogeneous catalyst to reduce FFA content prior to the base-catalyzed transesterification. The two-step in situ process resulted in a total FAME recovery up to 94.87 ¡À 0.86 % , which was much higher than that obtained by a one-step acid or base catalytic in situ process. The heterogeneous catalyst, Amberlyst-15, could be used for 8 cycles without significant loss in activity. This process have the potential to reduce the production cost of microalgae-derived FAME and be more environmental compatible due to the higher FAME yield with reduced catalyst consumption.