کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
686417 | 889074 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Transesterification of canola oil in mixed methanol/ethanol system and use of esters as lubricity additive Transesterification of canola oil in mixed methanol/ethanol system and use of esters as lubricity additive](/preview/png/686417.png)
Transesterification of canola oil was carried out with methanol, ethanol, and various mixtures of methanol/ethanol, keeping the molar ratio of oil to alcohol 1:6 and using KOH as a catalyst. Mixtures of alcohol increased the rate of transesterification reaction and produced methyl as well as ethyl esters. The increased rate was result of better solubility of oil in reaction mixture due to better solvent properties of ethanol than methanol and equilibrium due to methanol. With 3:3 molar ratio of methanol to ethanol {MEE (3:3)} the amount of ethyl ester formed was 50% that of methyl ester. Properties (acid value, viscosity, density) of all esters including mixed esters were within the limits of ASTM standards. Lubricities of these esters are in the order: ethyl ester > methyl ethyl ester > methyl ester.
Journal: Bioresource Technology - Volume 98, Issue 10, July 2007, Pages 2027–2033