Crystallisation and Melting Behavior of Methyl Esters of Palm Oil
Cheng Sit Foon, Yung Chee Liang, Noor Lida Habi Mat Dian, Choo Yuen May, Chuah Cheng Hock and Ma Ah Ngan
DOI : 10.3844/ajassp.2006.1859.1863
American Journal of Applied Sciences
Volume 3, Issue 5
The methyl esters of palm oil, which consists of saturated and unsaturated esters (0.6 to 95.9% unsaturation) of the C12 to C18 fatty acids, solidify at the two temperature ranges, -52 to -45°C and -24 to 21°C, when the esters are cooled. When the esters are heated, they melt at two distinct temperatures, -25 and -33°C and a broad peak at -9 to 28°C. The heating thermograms also showed an exothermic crystallisation peak in between two endothermic melting peaks, indicating the occurrence of re-crystallisation of low melting methyl esters into higher melting point crystal and then melt again at higher temperature.
© 2006 Cheng Sit Foon, Yung Chee Liang, Noor Lida Habi Mat Dian, Choo Yuen May, Chuah Cheng Hock and Ma Ah Ngan. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.