Solvent-Free Biodiesel Production Catalyzed by Crude Lipase Powder from Seeds: Effects of Alcohol Polarity, Glycerol, and Thermodynamic Water Activity,Journal of Agricultural and Food Chemistry

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Solvent-Free Biodiesel Production Catalyzed by Crude Lipase Powder from Seeds: Effects of Alcohol Polarity, Glycerol, and Thermodynamic Water Activity
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2017-09-25 00:00:00 , DOI: 10.1021/acs.jafc.7b03094
Paul Alain Nanssou Kouteu _{1,

2} , Joël Blin _{1,

3} , Bruno Baréa ₃ , Nathalie Barouh ₃ , Pierre Villeneuve ₃

Affiliation

The aim of this work was to evaluate the potential of crude lipase powders made from Adansonia grandidieri and Jatropha mahafalensis seeds for the synthesis of fatty acid alkyl esters in a solvent-free system. The influence of the nature of the alcohol, the amount of glycerol, and hydration of the powder was investigated. Results showed that the activity of these crude lipase powders was inversely proportional to the alcohol polarity and the amount of the glycerol in the reaction medium. To ensure optimum activity, A. grandidieri and J. mahafalensis powders must be conditioned to a water activity of 0.33 and 0.66. To obtain a fatty acid ethyl ester yield greater than 95% with A. grandidieri, ethanol should be introduced at an amount corresponding to a triacylglycerol to ethanol molar ratio of 2:1 every 15 h for 96 h and use 25% of preconditioned crude lipase powders (2 additions of 12.5%).

中文翻译：

种子中的粗脂肪酶粉末催化的无溶剂生物柴油生产：酒精极性，甘油和热力学水活度的影响

这项工作的目的是评估由Adansonia grandidieri和Jatropha mahafalensis种子制成的粗脂肪酶粉末在无溶剂体系中合成脂肪酸烷基酯的潜力。研究了醇的性质，甘油的量和粉末的水合的影响。结果表明，这些粗脂肪酶粉末的活性与反应介质中的醇极性和甘油含量成反比。为了确保最佳活性，必须将A. grandidieri和J. mahafalensis粉末的水活度调至0.33和0.66。要获得A. grandidieri的脂肪酸乙酯收率大于95％，应每15小时引入对应于三酰基甘油与乙醇摩尔比为2：1的乙醇，持续96 h，并使用25％的预处理粗脂肪酶粉末（两次添加为12.5％）。

更新日期：2017-09-25

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