Influence of post-injection strategies and CeO2 nanoparticles additives in the C30D blends and diesel on engine performance, NOX emissions, and PM characteristics in diesel engine

• Published in: Particulate science and technology Vol. 40; no. 7; pp. 824 - 837
• Main Authors: Fayad, Mohammed A., AL-Ogaidi, Bashar R., Abood, Marwa K., AL-Salihi, Hind A.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 03.10.2022; Taylor & Francis Ltd
• Subjects: Additives; BSFC; BTE; C30D; Castor oil; CeO; Cerium oxides; combustion; Cylinders; Diesel engines; Diesel fuels; Emissions; Mixtures; Nanoparticles; Particle size; Particulate emissions
• ISSN: 0272-6351; 1548-0046
• DOI: 10.1080/02726351.2021.2017088

This study investigates the influences of post-injection (PI) strategy and adding two concentrations (50 and 100 mg/l) of Cerium oxide (CeO 2 ) nanoparticles to the diesel-castor oil (C30D) and diesel on engine performance, NO X emissions, and characteristics of PM. The adding CeO 2 nanoparticles to the C30D and diesel were tested under with PI and W/O PI strategy. The results indicated that the BTE increased by 9.42% from the blends of C30D + CeO 2 compared with diesel + CeO 2 under with and without PI strategy. Furthermore, the BSFC decreased by 16.46% from C30D + CeO 2 nanoparticles compared with diesel + CeO 2 nanoparticles. The cylinder pressure and ROHR increased with addition of CeO 2 nanoparticles to the C30D compared to the C30D, diesel, and diesel + CeO 2 under different PI strategy. For the same CeO 2 concentration, the results showed that the NO X emissions decreased by 10.64% when adding 100 mg/L of CeO 2 to the C30D compared with diesel + CeO 2 nanoparticles by 8.73%. The adding 50 and 100 mg/L of CeO 2 to the C30D reduced the concentration of PM by 28.62 and 42.72%, respectively, compared C30D without additives. Besides, the adding both concentrations of CeO 2 to the diesel decreased the concentration of PM by 16.74 and 24.83%, respectively, compared without additives into the diesel fuel. It is found that the size of primary particles (d po ) slightly increased with addition of CeO 2 nanoparticles to the C30D and diesel under with and W/O PI strategy. The data of this experiment revealed that introduce the PI strategy and 100 mg/L of CeO 2 nanoparticles gives positive effect on engine performance, NO X emissions, and total concentration of PM. Highlights The cylinder pressure and rate of heat release increased with addition of CeO 2 nanoparticles to the C30D. Adding nanoparticles to C30D decreased the BSFC and increased BTE compared with those of the C30D and diesel without additives. The blends of C30D + CeO 2 decreased the concentration of PM. Adding different concentration of CeO 2 nanoparticles increased the average particle diameter. The NO X emissions decreased with addition CeO 2 nanoparticles to the C30D and diesel.