Synthesis of biodiesel from edible, non-edible and waste cooking oils via supercritical methyl acetate transesterification

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2010-12-01 DOI:10.1016/j.fuel.2010.07.033

Pasquale Campanelli, Mauro Banchero, Luigi Manna

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引用次数: 120

Abstract

The use of methyl acetate instead of methanol for supercritical synthesis of glycerol-free biodiesel from vegetable oils is a new process and its study is very limited in the literature. In this work, it has been tested for the first time on three edible and non-edible oils with different fatty acid composition. The process was also applied to waste oil with higher free fatty acid (FFA) content. The results demonstrate that the oil composition does not significantly influence the biodiesel yield.

The influence of temperature, pressure and molar ratio of reactants was studied. All the oils achieved complete conversion after 50 min at 345 °C, 20 MPa with methyl acetate:oil molar ratio equal to 42:1. The obtained data also allowed calculating the apparent rate coefficients and activation energies.

Eventually, some new information on the process was obtained. Thermal degradation of triacetin, which substitutes glycerol as the by-product of the transesterification reaction, was observed. Some indicative experiments were performed to understand the role of the acetic acid produced by FFA esterification.

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超临界乙酸甲酯酯交换法制备食用、非食用及废食用油生物柴油

用乙酸甲酯代替甲醇超临界合成植物油无甘油生物柴油是一种新工艺，文献研究非常有限。本文首次对三种不同脂肪酸组成的食用油和非食用油进行了测试。该工艺也适用于游离脂肪酸(FFA)含量较高的废油。结果表明，油的组成对生物柴油的产率没有显著影响。研究了温度、压力和反应物的摩尔比对反应的影响。在345°C, 20 MPa，乙酸甲酯:油的摩尔比为42:1的条件下，所有的油在50分钟后完全转化。所得数据还可以计算表观速率系数和活化能。最后，获得了有关该工艺的一些新信息。热降解，取代甘油作为酯交换反应的副产物，观察到。通过一些指示性实验来了解FFA酯化所产生的乙酸的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.