Enhancing the Impact of Biodiesel Blend on Combustion, Emissions, and Performance of DI Diesel Engine

The current research is conducted to evaluate experimentally the combustion, emissions, and performance of a 4-stroke, DI diesel engine when titanium dioxide nanoparticles are added to castor biodiesel-diesel blend in varying doses. The experiments are conducted at engine speed of 2000 rpm, various loads. Results of this study reveal that utilizing of titanium oxide nanoparticles (TiO(2)NPs) additives improves engine performance and reduces emissions. A decrease in brake-specific fuel consumption (BSFC) and an increase in brake thermal efficiency of up to 4.8% and 37.7%, respectively, are recorded. The ultimate reduction in NOx emission is 44.3% and is achieved at a TiO(2)NPs dose of 120 mg/l and 40% engine load. In addition to this reduction, a 5% decrease in CO emission, 4.25% increase in cylinder pressure and 15% deterioration in the BSFC are also recorded. Also, the maximum reduction in CO emission is 27% and is attained at TiO(2)NPs dose of 80 mg/l and 80% engine load. This reduction is accompanied with 6% decrease in NOx emission, 1.1% increase in cylinder pressure, and 4.8% reduction in BSFC. Based on the obtained results, the recommended dose of TiO(2)NPs in blend CB30 is 80 mg/l.