EFFECTS OF BIODIESEL CONTAMINATION ON OXIDATIVE AND STORAGE STABILITY OF NEAT AND BLENDED HYDROPROCESSED RENEWABLE DIESEL

摘要

The present work investigates the effects of biodiesel contamination on conventional and renewable marine diesels, i.e. NATO F-76 and HRD-76. The physical properties and chemical composition of F-76, HRD-76 and biodiesel were measured, including viscosity, density, and peroxide value. Long-term (ASTM D4625) and accelerated (ASTM D5304) test methods were used to investigate the influence of biodiesel on storage stability of HRD-76, F-76 and their blends. ASTM D2274 test was conducted to study the effect of biodiesel contamination on oxidation stability of neat and blended fuels. In addition, the impact of biodiesel contamination on physicochemical properties after stressing the fuel was also investigated according to the ASTM methods. The presence of biodiesel at contaminant levels did not have significant effects on the fuel properties or storage and oxidation stability of neat and blended HRD-76 or F-76. Properties of contaminated samples were determined to meet MIL-DTL-16884L specifications.