Investigation of the effect of the use of magnesium oxide (MgO) nanoparticle matter added biodiesel-diesel fuel blends in a diesel engine on the combustion and emission characteristics

In addition to the energy value, fluidity, low-temperature performance, and freezing point of biodiesel fuel mixtures, they are insufficient compared to diesel fuel in the controlled and uncontrolled combustion stages in diesel engines. For these reasons, it needs to be improved with various nanoparticle materials. In this study, renewable magnesium oxide (MgO) additives were added to BY35 and BY65 fuels at 60ppm and 120ppm, respectively, to improve the chemical and physical properties of the aspir biodiesel fuel mixture. For use in the experiments, the test fuels were prepared as DY (diesel fuel), B35, and B65, B35 + 60ppm MgO, B35+120ppm MgO, B65+60ppm MgO, and B65+120ppm MgO. Later, combustion and emission values were obtained under different operating parameters of a diesel research engine, and the effect of the additive was graphically compared with the DY fuel values to determine its impact. As seen from these comparisons, it has been determined that the BY35+60ppm MgO blended fuel has the highest cylinder gas pressure (SGP) value under 1.5 BMEP (Break mean effective pressure) load conditions compared to the other test fuels. Additionally, it has been determined that under 0.3 bar BMEP conditions, the SGP graph of the blended fuels shows similar combustion behavior compared to the other test fuels. At all load values, it has been observed that the net heat release value of MgO-additized test fuels improved combustion during the controlled combustion phases compared to the other three test fuels. While the additive positively contributed to HC emissions and smoke density, it partially increased CO, CO2, and NOx emissions. This study has determined that the MgO additive has a positive effect on the combustion of aspir biodiesel fuel blends.