Abstract
Several properties that determine the suitability of fatty acid methyl esters (FAMEs) as a diesel fuel component have been identified based on a literature review. The two properties that change the most with changes in the feedstock are considered the most important. These are the limiting filterability temperature and oxidative stability. The optimal fatty acid composition of FAMEs for these two indicators has been proposed: relatively low content of saturated fatty acids and polyunsaturated fatty acids and a high content of monounsaturated fatty acids. A comparison of the physicochemical and operational properties of methyl esters of camelina and rapeseed oils after their storage was carried out. It was determined that the density and viscosity indicators slightly exceed the upper limit established for diesel fuels according to GOST 32511, while high cetane numbers and good lubricity should be noted. A preliminary conclusion that this fuel in its pure form (B100) can be stored for at least 5 years can be drawn from the zero value of the FAME hydroperoxide value of camelina oil with a shelf life of 5 years It is logical to assume that impurities, including natural antioxidants (tocopherols), which are part of biodiesel from unrefined oil, help protect oxidative processes from radical interaction with atmospheric oxygen.
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