Optimizing CI Engine Performance with Neem Oil and Alumina Nano Particles: RSM Central Composite Design

This study examined the effects of engine speed and the concentration of alumina nanoparticles in diesel biodiesel mixed fuels on the operation and emission characteristics of a single-cylinder, four-stroke diesel engine. Alumina nanoparticles (50, 100, 150, and 200 ppm) were synthesized and added to diesel-biodiesel blended. These mixtures were used to power a diesel engine that run at various engine speeds (800, 850, 900, 950, and 1000 rpm). Using response surface methodology (RSM), the interplay of variables on the diesel engine's performance and emissions was subsequently examined. At a nanoparticle concentration of 160 ppm and an engine speed of 1000 rpm, the maximum values of brake power and torque were measured and found to be 42.82 kW and 402.8 N.m, respectively. Additionally, measurements of the minimum BSFC, CO, and HC were 207.21 gr/kWh, 2.09%, and 1.2%, respectively. At a nanoparticle concentration of 160 ppm and an engine speed of 1000 rpm, the maximum values of CO2 and NOx were measured as 3.09% and 1899 ppm, respectively. According to experimental findings, adding alumina nanoparticles to diesel-biodiesel blends can enhance engine performance and reduce emissions. It was observed that the established mathematical model can be utilized to predict engine emissions and performance with good accuracy.