An Assessment on the Nanoparticles-Dispersed Aloe vera Biodiesel Blends on the Performance, Combustion and Emission Characteristics of a DI Diesel Engine

摘要

This paper investigates the performance, combustion and emission characteristics of a direct injection (DI) diesel engine, fueled with alumina (Al2O3) nanoparticles-dispersed aloe vera diesel blends. The test fuels B10 (90% diesel and 10% aloe vera biodiesel), B10+Al2O3 (90% diesel, 10% aloe vera biodiesel and 30ppm of Al2O3 nanoparticles), B20 (80% diesel and 20% aloe vera biodiesel) and B20+Al2O3 (80% diesel, 20% aloe vera biodiesel and 30ppm of Al2O3 nanoparticles) are prepared separately for each aloe vera diesel blends at a dosage of 30ppm with an aid of an ultrasonicator. The combustion characteristics such as heat release rate and cylinder pressure are investigated using the data acquisition system, while the engine performance features are examined by brake-specific fuel consumption and brake thermal efficiency. The levels of engine pollutants are analyzed by unburned hydrocarbon (UBHC), carbon monoxide (CO), nitric oxide (NO) and smoke opacity. These investigations disclosed the use of biodiesel blends with Al2O3 nanoparticles in DI diesel engine with significant amelioration of combustion characteristic and substantial decrement of CO, NO, smoke, UBHC emissions and brake thermal efficiency by 44%, 47%, 37%, 29% and 3%, when compared with the diesel fuel.