DEVELOPMENT OF ENVIRONMENTALLY CLEAN MOTOR FUELS BASED ON A MIXTURE OF SYNTHETIC AND TRADITIONAL HYDROCARBONS AND THEIR PHYSICAL AND CHEMICAL ANALYSIS

This study investigates the physicochemical and performance properties of blended fuels obtained by compounding synthetic diesel fuel produced at the Uzbekistan GTL plant with conventional EURO K4 diesel fuel at blending ratios of 50–60%. The results showed that the cetane number of the blends ranged from 62 to 63, while the cetane index was 59.5–60.0. Fuel density varied between 791.2 and 796.1 kg/m³, and kinematic viscosity at 40 °C was in the range of 3.27–3.33 mm²/s. The cold filter plugging point was found to be –10 to –11 °C, indicating improved low-temperature performance due to the addition of synthetic components. Sulfur content ranged from 9.4 to 17.2 mg/kg, meeting environmental requirements. Flash point values were 71–75 °C, wear scar diameter was 450–460 μm, and oxidation stability sediment content was 3.3–3.7 g/m³. The obtained results confirm that scientifically based blending of synthetic GTL components with petroleum diesel fractions is a promising approach for producing environmentally friendly and high-performance motor fuels.