STUDY OF THE LUBRICABILITY PROPERTIES OF BIOFUELS AND THEIR MIXTURES WITH TIRE PYROLYSIS OIL

Abstract

The article analyzes the results of the study of the lubrication properties of diesel fuel (DD), biofuel (HVO) and their mixtures with tire pyrolysis oil (PPA15, PPA30, PPA60 and PPA100). Lubricity tests were performed using the HFFR high-frequency sliding motion bench. Fuel lubricity was determined by the wear mark formed on the glowing ball due to contact with a stationary plate immersed in fuel. The test was performed in accordance with the international standard ISO 12156. Analyzing the results, it was found that the maximum wear diameter of 0.343 mm was obtained using pure tire pyrolysis oil, the minimum wear diameter of 0.185 mm was recorded when using pure diesel fuel. The article examined the temperature dependences of fuel with different compositions, density and kinematic viscosity. Studies have shown that density increases with increasing PPA content in the biofuel blend and decreases with increasing temperature. The density dependence was obtained linearly. Depending on the fuel composition, the kinematic viscosity decreased with increasing temperature. It was found that the kinematic viscosity of tire pyrolysis oil is higher than that of conventional diesel fuel.