Abstract
Fuel oil, also known as furnace oil is a fraction of crude oil obtained when distillation processing is carried out in the refinery. Due to the high viscous of the heavy fuel oil, that makes it difficult to be pump throughout the pipework of the power plant, it is necessary to produce a fuel oil that will meet up the required standard. The aim of this study was to produce fuel oil from the blend of refinery intermediate product which meet certain European fuel specifications outlined in the EN 590:2009 standard alongside NMDPRA Standards. The blending stocks obtained from the Warri Refinery and Petrochemical Company (WRPC) were first filtered to remove some particulate impurities before they were analyzed to determine their properties after which, they were introduced into a mixed-tank that has an agitator connected and the blending was done using the blending ratio obtained from literature. The fuel oil produced was eventually analyzed for properties such as: Specific Gravity, API Gravity, Density, Viscosity, Kinematic Viscosity, Moisture Content, Flash Point, Cloud Point, Pour Point and Sulphur content. The sample with a composition of 33.3% of Decant oil (DCO), 33.3% Heavy gas oil (HGO), 33.3% light cycle oil (LCO) produced fuel oil of specific gravity 0.916, API Gravity 22.95, Density 0.896, Viscosity 40, Kinematic viscosity 4.7, pour point -6.5 and flash point 109, The analysis of the fuel oil meet the standard for blended fuel oil, according to the ISO 8217:2017 Standard. The results confirmed that blending of decant oil with conventional petroleum diesel (heavy and light gas oil) has a highly significant effect on the properties of the resulting fuel blend. The results show that by increasing the heavy gas oil content of the blend, the flash point of the blend increases; while increasing the decant oil content of the blend results in a decrease in Cloud point. The results of the analysis of the produced fuel oil confirms that its properties fall within the acceptable range for Fuel Oil and can be used as fuel for fired heaters and furnaces of the refinery and other process plants.

Key words: Fuel oil, heat exchanger, blend of refinery products, Blending, fired-heater