Performance, combustion, and emission analysis of CeO2 enriched tobacco seed oil biodiesel in CI engines

The increasing world need to cleaner and renewable fuel has fast tracked the development of alternative biodiesel especially non-edible sources. When the 'Tobacco seed oil biodiesel (TSOB) is augmented with nanocatalysts, there is a potential route towards bending fossil diesel and better performance and clean air. The paper discusses the performance, combustion and emission characteristics of a compression ignition (CI) engine, which is running on TSOB blends both in presence and absence of 0.5% by weight cerium oxide (CeO 2 ) nano particles. The proportions of three blends B20, B40, and B60 were tested during variable loads condition. Data indicate that 0.5-weight percent addition of nanoparticle CeO 2 got the best results in the B40 mixture. The thermal performance of the brake improved to 29.2% and specific fuel consumption was reduced to 0.21kg/kWh, which exceeds those of neat diesel and untreated blend of biodiesel. The maximum value of the cylinder pressure attained 77 bar, the highest heat release rate equal to 36 J/°CA indicated a high combustion kinetics of CeO 2 assisted oxidation and catalytic surface action. Analyzing the emissions allowed the demonstration of a large decrease in both carbon monoxide and unburned hydrocarbons (by 20% and 25%, respectively) as well as in particulate matter (blended down by about 15 %), relative to baseline blends. Even though with the utilization of biodiesel there was usually an increase in the NOx emissions, the CeO 2 addition was the effective remedy to this increase. In the research, it is established that in addition to presenting better thermal and combustion efficiency, nanoparticles-aided biodiesel present significant reductions in harmful emissions. This makes B40 + 0.5% CeO 2 a plausible and techno-environmentally friendly alternative to diesel use in CI engines, and to the adoption of more sustainable transport and decentralized energy systems.