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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Kinetics of the pre-treatment of used cooking oil using Novozyme 435 for biodiesel production
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Kinetics of the pre-treatment of used cooking oil using Novozyme 435 for biodiesel production

机译：预处理的废弃食用油的动力学生物柴油生产使用Novozyme 435

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The pre-treatment of used cooking oil (UCO) for the preparation of biodiesel has been investigated using Novozyme 435, Candida antarctica Lipase B immobilised on acrylic resin, as the catalyst. The reactions in UCO were carried out using a jacketed batch reactor with a reflux condenser. The liquid chromatography-mass spectrometry (LC-MS) method was developed to monitor the mono-, di-and triglyceride concentrations and it was found that the method was sensitive enough to separate isomers, including diglyceride isomers. It was found that the 1,3 diglyceride isomer reacted more readily than the 1,2 isomer indicating stereoselectivity of the catalyst. This work showed that Novozyme 435 will catalyse the esterification of free fatty acids (FFAs) and the transesterification of mono-and diglycerides typically found in UCO when Novozyme 435 is used to catalyse the pre-treatment of UCO for the formation of biodiesel. A kinetic model was used to investigate the mechanism and indicated that the reaction progressed with the sequential hydrolysis esterification reactions in parallel with transesterification.
机译：废弃食用油的预处理(UCO)生物柴油的制备调查使用Novozyme 435,假丝酵母南极洲脂肪酶B固定在丙烯酸树脂,作为催化剂。使用一批夹套反应器和执行回流冷凝器。光谱法(质)方法被开发监视mono - di和甘油三酸酯浓度和发现的方法极其敏感,足以单独的同分异构体,包括甘油二酯同分异构体。1、3甘油二酯异构体的反应更容易比1、2异构体表明立体选择性的催化剂。435年将催化酯化的自由脂肪酸(远期运费协议)的酯基转移作用mono和双甘酯通常发现在UCO当Novozyme 435用于催化预处理UCO的形成生物柴油。调查机制,指出与连续反应的进展并行水解酯化反应酯交换。

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