Restrictive emission regulations and climate change are the main motivations for improving engine combustion characteristics to decrease engine-out emissions and fuel consumption. Fuel additives are effective solutions to improve fuel properties to address these challenges. In this study, simultaneous application of water and cerium oxide nanoparticles in diesel-biodiesel fuel blend on performance and emission characteristics of a single cylinder diesel engine operated at start of injection of 20 before top dead center was experimentally investigated. Achieved results showed that the B5W7m fuel emulsion (B5 containing 7% water and nanoparticle) enhanced brake thermal efficiency by more than 13.5 and 6% compared to B5W7 and B5, respectively. Furthermore, the B5W7m reduced brake specific fuel consumption by8% and 23% vs. those of B5 and B5W7, respectively. CO emission was considerably decreased by using B5W7m, i.e., by 42% and 3% compared with B5W7 and B5, respectively. Combustion improvements observed could be attributed to the catalytic effect of cerium oxides nanoparticles. On the other hand, addition of 90 ppm CeO₂ into the B5W7increased NOx emission by about 14%, this value was still 21% lower than the NOx emitted by B5 combustion though.

限制性排放法规和气候变化是改善发动机燃烧特性以减少发动机熄火排放和燃料消耗的主要动力。燃料添加剂是改善燃料性能以应对这些挑战的有效解决方案。在这项研究中，实验研究了水和氧化铈纳米粒子在柴油-生物柴油燃料混合物中的同时应用对上死点之前20点喷射开始运行的单缸柴油机的性能和排放特性的影响。取得的结果表明，与B5W7和B5相比，B5W7m燃油乳化液（含7％水和纳米粒子的B5）的制动热效率分别提高了13.5和6％以上。此外，B5W7m的制动器比油耗比分别降低了8％和23％。分别是B5和B5W7。通过使用B5W7m，CO排放量显着降低，即分别比B5W7和B5降低42％和3％。观察到的燃烧改善可以归因于氧化铈纳米颗粒的催化作用。另一方面，向B5W7中添加90 ppm CeO ₂可使NOx排放增加约14％，但该值仍比B5燃烧排放的NOx低21％。