Investigation On The Preration And Catalytic Performance Of Cerium-based Diesel Additives

Catalyst additives used in the diesel engine for improvement of combustionperformance have been studied for a long time. This report primarily focused onsynthesis and characterization of cerium-based catalyst additive which is soluble in thediesel and facilitates combustion and reduces harmful emissions.The optimum preparation temperature and time of cerium-based acetylacetonatewere353K and2h, respectively. They were identified by FT-IR to be cerium-basedacetylacetonate composing of Ce, Zr, and Fe. Simulating the real process of engineloading, the resulting metal-organic compounds were calcinated. SEM and XRD wereused to analyse the morphological and structural information of the particulate productsobtained. XRD patterns confirmed that those particles were doped-CeO2. SEM imagesshowed that they are homogeneous with a narrow size distribution in nanosize range(5-50nm). The highest average reduction of CO emission by adding additives into dieselcan reach to48.2%while comparing with pure diesel, and the optimum usage ofadditives was2-4‰.The optimum prepartion temperature and time of another type of additives were353K and20min, respectively. They were identified by FT-IR to be cerium-basedisooctanoate and then be added into diesel to test their performance. The highestaverage reduction of CO emission can reach to64.47%, and the optimum usage ofadditives was2-4‰.Our findings provide evidences that the transition and rare earth metal compoundscould be applicable for controlling the diesel engine emissions.