by the produced methyl esters.
Iodine value is a measure of the degree of unsaturation of a vegetable oil or animal fat. The iodine value is not listed in ASTM D6751 while it is listed in EN 14214 biodiesel standard to be maximum 120. The iodine value of the produced methyl esters fitted the biodiesel fuel standard value. The cold filter plugging point (CFPP) is used to characterize the cold flow operability of a fuel because it directly affects the utility of the fuel, especially in cold climate conditions. The CFPP value of COME was much lower compared to CFME and FOME. The CFPP of FOME was +10 C which were unacceptable to use these esters in the winter temperate climates.
Sulfur content of a fuel has an effect on engine wear and deposits. Sulfur in the fuels is harmful for environmental and human health, and it also affects emission values. Sulfur content must be maximum 10 ppm for EN 14214 and it has two standard values as S15 and S500 for ASTM D6751. S15 sulfur content standard allows maximum to be 15 ppm, whereas S500 sulfur content standard allows maximum to be 500 ppm. Researchers (He et al., 2009)