Abstract: Nanoparticulate CeO2 well dispersed in diesel fuel was prepared from oil-soluble salicylaldimine Schiff Base-cerium (III) chloride complexes under higee conditions. The effect of using nano-CeO2 dispersed component as fuel additive on the diesel engine performance and emissions were evaluated on Phaser140Ti-E30 test device with inline four-engine. A fuel saving of about 7% was obtained and the waste emissions including exhaust smoke, total hydrocarbons (THC) and particulate matter (PM) reduced with a nano-CeO2 adding dosage of 50 g/g in diesel fuel.

Key words: nanoparticulate ceria, rare earth, fuel additive, energy saving and waste emissions reduction