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

作者：Dong Tao; Wang Jun; Miao Chao; Zheng Yubin; Chen Shulin^*

来源：Bioresource Technology, 2013, 136: 8-15.

DOI：10.1016/j.biortech.2013.02.105

• Microalgae
• Esterification
• FAME
• Transesterification
• Two-step in situ process

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 +/- 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.

• 出版日期2013-5