Facile preparation of Co and Ce oxide nanoparticles by an aerosol method and their catalytic evaluation for diesel soot abatement

M.L. GODOY; BANÚS, E.D.; E.E. MIRÓ; MILT, V.G.

Workshop; French-Argentinean Workshop on Heterogeneous Catalysis; 2023

road and non-road transport. Among them, diesel engines are used for light and heavy-duty vehicles, agricultural and construction machinery, ships and industries because of their low consumption rate, high fuel economy and strong durability throughout time. Nevertheless, the associated increased particulate matter (PM) emissions during incomplete combustion of diesel engines are of global concern, as human health, our environment and global climate are all affected. Thereby, worldwide restrictive exhaust emission limits have been imposed in order to improve urban air quality. Current commercial solutions combine different operations performed in different compartments, thus increasing the size and cost of this aftertreatment technology. Consequently, there is a substantial interest in novel approaches that involve more abundant or discarded elements with high efficiency and stability, combined with low-cost technology. Catalyzed diesel particulate filters (CDPFs) have been proven to be effective in reducing PM in diesel engines. In order to reduce the production costs of the CDPF catalysts, CeO2 and Co3O4 oxide particles were synthesized by precipitation from microdroplets of Ce and Co nitrate precursor solutions generated using a nebulizer and two different precipitating agents. This method was selected due to its simplicity and low cost. Both synthesized particles were characterized and tested for the catalytic removal of carbonaceous particles. This is a first step towards achieving cobalt oxide particles recovered from spent lithium-ion batteries and depositing them in stacked wire mesh monoliths.