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Reducing Air Pollutants in High-Altitude Regions: New Study on Cerium Oxide and Diesel Engine Emissions

Strategic Insights

— 2 min read

A new study conducted by researchers at the University of the Fuerzas Armadas ESPE has made significant findings on the impact of cerium oxide on reducing emissions and fuel consumption in high-altitude regions. The research focused on the emissions of carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC), nitric oxides (NOx), particulate matter (PM), and fuel consumption in a compression ignition internal combustion engine on a road route cycle in Quito, Ecuador. The study aimed to investigate the effects of adding cerium oxide to diesel fuel on the emissions of these pollutants.

Key Takeaways:

  • The researchers used a mixture of diesel and cerium oxide at a concentration of 250 ppm and found a 27.1% reduction in PM, a 24.9% increase in NOx, and a 24.2% increase in HC, along with a 1% decrease in fuel consumption compared to premium diesel.
  • The reduction in PM was attributed to the catalytic action of CeO2, which enhances carbon oxidation, while the increase in NOx was related to the higher temperature in the combustion chamber resulting from the improved thermal efficiency of the engine.
  • The study concluded that adding cerium oxide to diesel fuel can provide guidelines for controlling air pollutants originating from vehicle emissions in high-altitude road operations.
  • Five repetitions were performed for each fuel, and the results obtained were statistically analyzed using control charts.
  • The researchers observed a significant difference in emissions and fuel consumption between the cerium oxide-diesel mixture and premium diesel.
  • The study highlights the potential of cerium oxide as an additive to reduce emissions and improve fuel efficiency in high-altitude regions.

Statistics:

  • A 27.1% reduction in PM emissions was observed when comparing the cerium oxide-diesel mixture to premium diesel.
  • A 24.9% increase in NOx emissions was recorded when using the cerium oxide-diesel mixture compared to premium diesel.
  • A 24.2% increase in HC emissions was observed when comparing the cerium oxide-diesel mixture to premium diesel.
  • A 1% decrease in fuel consumption was reported when using the cerium oxide-diesel mixture compared to premium diesel.
  • The study consisted of five repetitions for each fuel, with statistical analysis performed using control charts.

Sources:

  • Analysis of Emissions and Fuel Consumption of a Truck Using a Mixture of Diesel and Cerium Oxide on High-Altitude Roads. Vehicles, 2025, 7(3):85.
  • https://doi.org/10.3390/vehicles7030085
  • University of the Fuerzas Armadas ESPE
  • Marcelo Cueva, Departamento de Ciencias de la Energia y Mecanica, University of the Fuerzas Armadas ESPE, Sangolqui P.O. Box 6 171-5-231B, Ecuador
  • Sebastian Valle, Alfredo Cevallos, Jefferson Ormaza, Hector Calvopina, Francisco Montero.

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