Performance and emissions of a diesel engine fueled by Tiska 68-based synthetic fuel blends

This work compares and studies the performance and emissions of a single-cylinder diesel engine fuelled by diesel and blends of a fuel derived from used industrial oil. Tiska 48 used industrial oil is used as raw material. By transesterification of this oil, biodiesels were created and combined with diesel in proportions of 15%, 30% and 45%. Diesel engine emissions, performance, and combustion were calculated at a nominal speed of 1600 rpm and load variation. The procedure and experimental design for extracting the new fuel by transesterification are described in detail. The first part of the study focused on the identification and physicochemical characterization of the fuels in order to establish selection criteria for direct use on an engine test bench. The characteristics studied were liquid density, kinematic viscosity, dynamic liquid viscosity, acid number and flash point. A set of three mixing ratios was selected for fuel synthesis. The second part was devoted to bench tests carried out on a Kipor 178F diesel engine. Synthetic fuels were tested with 15%, 30% and 45% BT 68 fuel blends. A comparative study was carried out, highlighting engine performance and NOx, CO, BFCS and EGT emissions for each fuel used. Blending pure diesel with synthetic fuel reduced carbon monoxide and NOx emissions by 85% and 65%, respectively. The BFCS of the biodiesel combinations is in perfect agreement with that of pure diesel but slightly higher (around 9.12%) overall