Depressor additives for diesel fuels based on chitosan – with improvement of their physical and chemical properties

ficient diesel fuel based on biodegradable polymer chitosan ApisMellifera synthesized from dead bees with a copolymer of styrene (CT) with methacrylic acid (MAA). Various types of diesel, such as antibacterial, cetane boosters, depressants, detergents and dispersants, were analyzed. Methods for obtaining chitosan in a liquid nitrogen environment by the cryogenic method were studied and comparisons were made with chitosan obtained by conventional methods. Physicochemical properties of chitin and chitosan were studied by IR spectroscopy and SEM analysis. A new additive based on chitosan synthesized by the cryogenic method was obtained and a depressant additive based on biodegradable chitosan, a copolymer of styrene and methacrylic acid was developed, which improves the properties of diesel fuel. The results of diesel fuel tests using the ST MAA copolymer additive with chitosan were studied. The kinematic viscosity of biodiesel was studied and it was found that the sulfur content in diesel fuel was higher, 400 mg/kg, and in the developed diesel fuel it was less than 10 mg/kg. The obtained results indicate a high assessment of the quality of diesel fuel. This made it possible to reduce the pour point from -12 to -22 °C and from -15 to -25 °C.

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