Rheological properties of residual fuel oil containing fuel blends with bioadditives. Part 2. Bioadditives based on methyl esters of rapeseed oil

Rheological properties of residual fuel oil, water–residual fuel oil emulsions, and their blends with off-grade methyl esters of fatty acids (MEFA) of rapeseed oil are studied in the 20-80 °C range. It is demonstrated that addition of 1-10% of MEFA reduces the viscosity of residual fuel oil of the trademark M100 by 12-73% and addition of 1-3% of MEFA reduces the viscosity of water–residual fuel oil emulsions by 15-65%. Use of MEFA bioadditives and rapeseed oil is shown to be effective for modification of water-containing residual fuel oils.