alexa Integrated biodiesel production: a comparison of different homogeneous catalysts systems.
Neurology

Neurology

Brain Disorders & Therapy

Author(s): Vicente G, Martnez M, Aracil J

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Abstract The most common catalysts for biodiesel production are homogeneous basic catalysts. In the present paper, a comparison is made of different basic catalysts (sodium methoxide, potassium methoxide, sodium hydroxide and potassium hydroxide) for methanolysis of sunflower oil. All the reactions were carried out under the same experimental conditions in a batch stirred reactor and the subsequent separation and purification stages in a decanter. The analytical methods included gas chromatography and the determination of fat and oil conventional parameters. The biodiesel purity was near 100 wt.\% for all catalysts. However, near 100 wt.\% biodiesel yields were only obtained with the methoxide catalysts. According to the material balance of the process, yield losses were due to triglyceride saponification and methyl ester dissolution in glycerol. Obtained biodiesel met the measured specifications, except for the iodine value, according to the German and EU draft standards. Although all the transesterification reactions were quite rapid and the biodiesel layers achieved nearly 100\% methyl ester concentrations, the reactions using sodium hydroxide turned out the fastest. This article was published in Bioresour Technol and referenced in Brain Disorders & Therapy

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