Abstract Herein we demonstrated an economically beneficial process coproducing biojet fuel and high-value polyunsaturated fatty acids (PUFAs) from Schizochytrium sp. ABC101 microalgae. Schizochytrium is a promising biofuel source for its rapid growth, high cell density, and fast lipid accumulation via heterotrophic cultivation. The most important feature of Schizochytrium is that half of its lipids are composed of omega-3 PUFAs (i.e., docosahexaenoic acid and docosapentaenoic acid), which are currently commercialized as dietary supplements at a high price. We observed direct injection of PUFA-rich lipid into a high-temperature catalytic reactor can cause rapid catalyst deactivation via coke deposition. Therefore, the PUFAs were separated by short-path distillation after transesterification. The remaining esters of saturated fatty acids (SFAs) were catalytically deoxygenated into C13–C18 n-paraffins, and then subsequently hydrocracked to produce iso-rich paraffins that are suitable as biojet fuel. As the result, 54.6 wt% PUFA-enriched esters (purity: 87.7%) and 20.4 wt% of qualified biojet fuel with respect to the initial lipids were obtained.

中文翻译：

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一种从异养微藻裂殖壶菌中联合生产生物喷气燃料和高价值多不饱和脂肪酸酯的新工艺。ABC101

摘要 在此，我们展示了一种从裂殖壶菌中联合生产生物喷气燃料和高价值多不饱和脂肪酸 (PUFA) 的经济有益的工艺。ABC101 微藻。裂殖壶菌因其快速生长、高细胞密度和通过异养培养快速积累脂质而成为一种很有前途的生物燃料来源。Schizochytrium 最重要​​的特征是其一半的脂质由 omega-3 PUFA（即二十二碳六烯酸和二十二碳五烯酸）组成，目前它们以高价作为膳食补充剂进行商业化。我们观察到将富含 PUFA 的脂质直接注入高温催化反应器可通过焦炭沉积导致催化剂快速失活。因此，在酯交换后通过短程蒸馏分离多不饱和脂肪酸。剩余的饱和脂肪酸 (SFAs) 酯被催化脱氧成 C13-C18 正链烷烃，然后加氢裂化以生产适合作为生物喷气燃料的富含等量链烷烃。结果，相对于初始脂质，获得了 54.6 wt% 的 PUFA 富集酯（纯度：87.7%）和 20.4 wt% 的合格生物喷气燃料。