Bio-Energy Research Team, Research Institute of Industrial Science and Technology (RIST), Kwangyang-City 540-090, Cholla-Nam-Do, South Korea.
Bioresour Technol. 2013 Feb;129:672-5. doi: 10.1016/j.biortech.2012.12.015. Epub 2012 Dec 14.
The noncatalytic transformation of the crude lipid of Chlorella vulgaris (C. vulgaris) into fatty acid methyl ester (FAME) via a thermo-chemical process was mainly investigated in this work. The crude lipid of C. vulgaris was recovered by means of solvent extraction from C. vulgaris cultivated in a raceway pond. The conventional catalyzed transesterification of crude lipid of C. vulgaris is notably inhibited by the impurities contained in the crude lipid of C. vulgaris. These impurities are inevitably derived from the solvent extraction process for C. vulgaris. However, this work presents the noncatalytic transesterification of microalgal lipid into FAME, which could be an alternative option. For example, the noncatalytic transformation of microalgal lipid into FAME provides evidence that the esterification of free fatty acids (FFAs) and the transesterification of triglycerides can be combined into a single step less susceptible to the impurities and with a high conversion efficiency (∼97%).
本工作主要研究了通过热化学过程将普通小球藻（Chlorella vulgaris，C. vulgaris）粗油脂非催化转化为脂肪酸甲酯（FAME）。采用溶剂萃取法从跑道池培养的 C. vulgaris 中回收粗油脂。C. vulgaris 粗油脂中的杂质会显著抑制常规催化的 C. vulgaris 粗油脂的酯交换反应。这些杂质不可避免地来自于 C. vulgaris 的溶剂萃取过程。然而，本工作提出了微藻油脂非催化酯交换为 FAME 的方法，这可能是一种替代选择。例如，微藻油脂非催化转化为 FAME 提供了证据，证明游离脂肪酸（FFAs）的酯化和三酰基甘油的酯交换可以结合成一个步骤，减少对杂质的敏感性，并具有较高的转化率（约 97%）。
