Department of Biotechnology, School of Marine and Fisheries Life Science, Pukyong National University, Busan 48513, Republic of Korea.
Department of Biotechnology, School of Marine and Fisheries Life Science, Pukyong National University, Busan 48513, Republic of Korea.
Bioresour Technol. 2020 Oct;313:123684. doi: 10.1016/j.biortech.2020.123684. Epub 2020 Jun 13.
Scenedesmus obliquus, a green microalga of the class Chlorophyceae, has been used to produce biofuels. However, limited research has been reported on platform chemicals that use microalgae as biomass to replace fossil sources. This paper reports on the investigation of levulinic acid (LA) production from lipid-extracted S. obliquus with an acid-catalyzed thermochemical conversion using a statistical experimental approach. For the reaction factors, the highest effect on LA yield resulted from catalyst concentration. The optimized LA yield of 45.63 wt% (70.7 mol%) was achieved with 5 wt% lipid-extracted microalgae and reaction factors of 0.85 M HCl as a catalyst at 180 °C for 10 min. Also, the LA yield as a function of the combined severity factor followed a sigmoid curve. High LA yield resulted from combined severity factors greater than 3.4. These results indicate that the production of platform chemicals may be possible using microalgae feedstocks and thermochemical conversion.
斜生栅藻是绿藻门的一种绿色微藻，已被用于生产生物燃料。然而，利用微藻作为生物质替代化石资源生产平台化学品的研究还很有限。本文报道了采用统计实验方法，利用酸催化热化学转化从提取脂质的斜生栅藻中生产乙酰丙酸（LA）的研究。对于反应因素，催化剂浓度对 LA 产率的影响最大。在 5wt%脂质提取微藻和反应条件为 0.85M HCl 催化剂、180°C 反应 10min 的优化条件下，LA 的产率达到了 45.63wt%（70.7mol%）。此外，LA 产率随综合严重度因子的变化呈 S 型曲线。综合严重度因子大于 3.4 时，LA 产率较高。这些结果表明，利用微藻原料和热化学转化可能生产平台化学品。
