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首页> 外文期刊>Journal of biological engineering >Lipase-catalyzed biodiesel production and quality with Jatropha curcas oil: exploring its potential for Central America
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Lipase-catalyzed biodiesel production and quality with Jatropha curcas oil: exploring its potential for Central America

机译：麻疯树油对脂肪酶催化生物柴油的生产和品质的影响：探索其在中美洲的潜力

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Background Extensive native Jatropha curcas L. (Jatropha) crop areas have been planted in Central America marginal lands since 2008 as a non-edible prospective feedstock alternative to high-value, edible palm oil. Jatropha biodiesel is currently exclusively produced in the region at commercial scale utilizing alkaline catalysts. Recently, a free, soluble Thermomyces lanuginosus (TL) 1,3 specific lipase has shown promise as biocatalyst, reportedly yielding up to 96 % ASTM D6751 compliant biodiesel after 24 h transesterification of soybean, canola oils and other feedstocks. Biodiesel conversion rate and quality of enzymatically catalyzed transesterification of Jatropha oil was evaluated. Two lipases: free, soluble TL and immobilized Candida antarctica (CA) catalyzed methanolic transesterification of crude Jatropha and refined palm oil. Results Jatropha yields were similar to palm biodiesel with NaOH as catalyst. After 24 h transesterification, Jatropha (81 %) and palm oil (86 %) biodiesel yields with TL as catalyst were significantly higher than CA (90 %). Enzymatic catalysts (TL and CA) produced Jatropha biodiesel with optimum flow properties but did not complied with ASTM D6751 stability parameters (free fatty acid content and oil stability index). Conclusions Biodiesel production with filtered, degummed, low FFA Jatropha oil using a free liquid lipase (TL) as catalyst showed higher yielding potential than immobilized CA lipase as substitute of RBD palm oil with alkaline catalyst. However, Jatropha enzymatic biodiesel yield and stability were inferior to alkaline catalyzed biodiesel and not in compliance with international quality standards. Lower quality due to incomplete alcoholysis and esterification, potential added costs due to need of more than 24 h to achieve comparable biodiesel yields and extra post-transesterification refining reactions are among the remaining drawbacks for the environmentally friendlier enzymatic catalysis of crude Jatropha oil to become an economically viable alternative to chemical catalysis.
机译：背景技术自2008年以来，中美洲边缘地区广泛种植了麻风树麻风树（Jatropha），作为高价值可食用棕榈油的不可食用的前瞻性原料。麻风树生物柴油目前仅在该地区利用碱性催化剂以商业规模生产。最近，一种游离的，可溶的嗜热单胞菌（TL）1,3特异性脂肪酶已显示出作为生物催化剂的前景，据报道在大豆，低芥酸菜子油和其他原料进行酯交换24小时后，可产生高达96％的符合ASTM D6751标准的生物柴油。评价了麻疯树油的生物柴油转化率和酶催化酯交换反应的质量。两种脂肪酶：游离的可溶性TL和固定的南极假丝酵母（CA）催化粗麻风树和精制棕榈油的甲醇酯交换反应。结果麻风树的产量与以NaOH为催化剂的棕榈生物柴油相似。酯交换反应24小时后，以TL为催化剂的麻风树（81％）和棕榈油（86％）生物柴油收率明显高于CA（90％）。酶促催化剂（TL和CA）生产的麻风树生物柴油具有最佳流动性能，但不符合ASTM D6751稳定性参数（游离脂肪酸含量和油稳定性指数）。结论使用游离液体脂肪酶（TL）作为催化剂，过滤，脱胶，低FFA麻风树麻风树油生产的生物柴油比固定化CA脂肪酶代替RBD棕榈油用碱性催化剂生产具有更高的产量潜力。但是，麻风树的酶法生物柴油的产量和稳定性均不如碱催化生物柴油，并且不符合国际质量标准。由于不完全的醇解和酯化而导致的质量降低，由于需要超过24小时才能达到可比的生物柴油收率以及额外的酯交换后精制反应而导致的潜在增加成本，是对麻疯树粗制油进行环境友好的酶促催化转化为残油的遗留缺点。在经济上可以替代化学催化。

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