Lipase-Mediated Selective Methanolysis of Fish Oil for Biodiesel Production and Polyunsaturated Fatty Acid Enrichment,Energy & Fuels

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Lipase-Mediated Selective Methanolysis of Fish Oil for Biodiesel Production and Polyunsaturated Fatty Acid Enrichment
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-06-12 00:00:00 , DOI: 10.1021/acs.energyfuels.8b00749
Gaojian Ma ₁ , Lingmei Dai ₁ , Dehua Liu _{1,

2} , Wei Du _{1,

2}

Affiliation

Fish oil, containing quite a large amount of polyunsaturated fatty acids (PUFAs), is well-recognized as a good source for biodiesel and health care product production. A two-step process involving free lipase NS81006-mediated methanolysis followed by immobilized lipase Novozym 435-catalyzed conversion was proposed for the utilization of fish oil in this paper. During the lipase NS81006-catalzyed methanolysis process, the selectivity of lipase on different free fatty acids (FFAs) was studied systematically, and it was found that the length of the carbon chain and the number and position of C–C double bonds had a varied influence on the selectivity of lipase. The reaction rate and biodiesel yield decreased with the increase of the carbon chain length; higher conversion could be obtained with unsaturated FFAs (C18:1, C18:2, and C18:3) compared to unsaturated FFA (C18:0), among which FFA with three double bonds gave the highest conversion. Through this two-step lipase-mediated catalysis, both the conventional FFAs and PUFAs could be converted to their corresponding fatty acid methyl ester (FAME) effectively and a FAME yield of over 90% was obtained. The studies provide a rational guidance for biodiesel production as well as the enrichment of PUFAs.

中文翻译：

脂肪酶介导的鱼油选择性甲醇分解用于生物柴油生产和多不饱和脂肪酸富集

鱼油中含有大量的多不饱和脂肪酸（PUFA），是公认的生物柴油和保健产品生产的良好来源。本文提出了由游离脂肪酶NS81006介导的甲醇分解然后固定化脂肪酶Novozym 435催化转化的两步过程，以用于鱼油的利用。在脂肪酶NS81006催化的甲醇分解过程中，系统地研究了脂肪酶对不同游离脂肪酸（FFA）的选择性，发现碳链的长度以及C–C双键的数量和位置存在差异对脂肪酶选择性的影响。随着碳链长度的增加，反应速率和生物柴油收率降低。使用不饱和FFA（C18：1，C18：2和C18：3）与不饱和FFA（C18：0）相比，其中具有三个双键的FFA转化率最高。通过两步脂肪酶介导的催化作用，常规的FFA和PUFA都可以有效地转化为相应的脂肪酸甲酯（FAME），并且FAME的收率超过90％。这些研究为生物柴油的生产以及PUFA的富集提供了合理的指导。

更新日期：2018-06-12

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