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

GODOY, MARÍA LAURA; BANÚS, EZEQUIEL DAVID; MIRÓ, EDUARDO ERNESTO; MILT, VIVIANA GUADALUPE

Santa Fe

Workshop; French-Angentinean Workshop on Heterogeneous Catalysis; 2023

INCAPE - CONICET

Internal combustion engines arecurrently the most widespread used propulsion system in road and non-roadtransport. Among them, diesel engines are used for light and heavy-duty vehicles,agricultural and construction machinery, ships and industries because of theirlow consumption rate, high fuel economy and strong durability throughout time.Nevertheless, the associated increased particulate matter (PM) emissions duringincomplete combustion of diesel engines are of global concern, as human health,our environment and global climate are all affected. Thereby, worldwiderestrictive exhaust emission limits have been imposed in order to improve urbanair quality. Current commercial solutions combine different operationsperformed in different compartments, thus increasing the size and cost of thisaftertreatment technology. Consequently, there is a substantial interest innovel approaches that involve more abundant or discarded elements with highefficiency and stability, combined with low-cost technology. Catalyzed dieselparticulate filters (CDPFs) have been proven to be effective in reducing PM indiesel engines. In order to reduce the production costs of the CDPF catalysts,CeO2 and Co3O4 oxide particles weresynthesized by precipitation from microdroplets of Ce and Co nitrate precursorsolutions generated using a nebulizer and two different precipitating agents.This method was selected due to its simplicity and low cost. Both synthesizedparticles were characterized and tested for the catalytic removal ofcarbonaceous particles. This is a first step towards achieving cobalt oxideparticles recovered from spent lithium-ion batteries and depositing them instacked wire mesh monoliths.