Effect of nano cerium oxide additive with tire oil blends on diesel engine combustion and emissions parameters with soot morphology analysis

This article focused to analyze the effect of cerium oxide (CeO2) as an additive to distilled tire oil blends (DTO30) in diesel engine operation. The nano cerium oxide (morphology: spherical with a size of 20 nm) was added with proportions of 50 mg/L and 100 mg/L to the distilled tire oil blend. Addition of this CeO2 to tire oil blends tend to reduce emission, soot suspension time along with improved engine performance. The extraction of tire oil was carried out by thermal pyrolysis and distilled with a fractional distillation column apparatus. The diesel engine was tested and the results were analyzed based on performance, combustion and emission with soot morphology analysis using transmittance electron microscope (TEM). The results with CeO2 operations show that the brake thermal efficiency was increased up to 14% with 100 mg/L and brake specific fuel consumption was reduced significantly compared with DTO30 without CeO2. The cylinder pressure and heat release rate were reduced by shortening the ignition delay. Also the NOx, CO, and UHC were reduced between 15% and 22% with CeO2 additives compared to normal operations. Also, the reduction of soot particle has found up to 20% while using additives. In TEM morphology, the size of soot particulates was increased because its intensity to bind around the cerium oxide, the size was increased up to 200 nm to 300 nm than normal size.