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首页> 外文期刊>Bioprocess and Biosystems Engineering >Continuous enzymatic biodiesel production from coconut oil in two-stage packed-bed reactor incorporating an extracting column to remove glycerol formed as by-product
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Continuous enzymatic biodiesel production from coconut oil in two-stage packed-bed reactor incorporating an extracting column to remove glycerol formed as by-product

机译：在两级填充床反应器中从椰子油连续生产酶促生物柴油，该反应器配有萃取塔以除去副产物甘油

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The transesterification of coconut oil with ethanol catalyzed by Burkholderia cepacia lipase immobilized on polysiloxane-polyvinyl alcohol was performed in a continuous flow. The experimental design consisted of a two-stage packed-bed reactor incorporating a column with cationic resin (Lewatit GF 202) to remove the glycerol formed as by-product and the reactor performance was quantified for three different flow rates corresponding to space-times from 10 to 14 h. The influence of space-time on the ethyl ester (FAEE) concentrations, yields and productivities was determined. The reactor operation was demonstrated for space-time of 14 h attaining FAEE concentrations of 58.5 +/- 0.87 wt%, FAEE yields of 97.3 +/- 1.9 % and productivities of 41.6 +/- 1.0 mg(ester) g (medium) (-1) h(-1). Biodiesel purified samples showed average kinematic viscosity values of 5.5 +/- 0.3 mm(2) s(-1) that meet the criteria established by the American National Standard ASTM (D6751). The immobilized lipase was found to be stable regarding its morphological and catalytic characteristics, showing half-life time (t (1/2)) around 1540 h. The continuous packed-bed reactor connected in series with simultaneous glycerol removal has a great potential to attain high level of transesterification yields, raising biodiesel productivity.
机译：以连续流进行固定化聚硅氧烷-聚乙烯醇的洋葱伯克霍尔德菌脂肪酶催化的椰子油与乙醇的酯交换反应。实验设计由两步填充床反应器组成，该反应器装有带有阳离子树脂的色谱柱（Lewatit GF 202），以除去副产物甘油，并定量了三种不同流速的反应器性能，分别对应于10至14小时。确定了时空对乙酯（FAEE）浓度，收率和生产率的影响。证明了该反应器操作的时空为14小时，达到58.5 +/- 0.87 wt％的FAEE浓度，97.3 +/- 1.9％的FAEE收率和41.6 +/- 1.0 mg（酯）g（中）的生产率（ -1）h（-1）。生物柴油纯化的样品显示的平均运动粘度值为5.5 +/- 0.3 mm（2）s（-1），符合美国国家标准ASTM（D6751）建立的标准。发现固定化的脂肪酶在形态和催化特性方面稳定，在1540 h左右显示出半衰期（t（1/2））。串联连接的连续填充床反应器可同时去除甘油，具有实现高酯交换收率水平的巨大潜力，从而提高了生物柴油的生产率。

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