Study on the effect of Ce₁˗ₓMnₓO₂ catalyst on improving diesel emission performance

To reduce diesel emissions while permitting the passive regeneration of the diesel particulate filter (DPF) at low temperatures, the authors developed three after-treatment DPF devices. These devices consisted of a ceramic body that was either bare or loaded with the catalysts CeO₂ (DPF-CeO₂) or Ce₀.₅Mn₀.₅O₂ (DPF-Ce₀.₅Mn₀.₅O₂). The effects of these units on soot, NOₓ, CO, and hydrocarbon emissions were assessed. On average, the DPF-Ce₀.₅Mn₀.₅O₂ device outperformed the DPF-CeO₂ device. In addition, increasing the engine load was found to raise the exhaust temperature while increasing the soot oxidation efficiency and reducing soot emissions. The maximum soot removal percentages of the DPF-CeO₂ and DPF-Ce₀.₅Mn₀.₅O₂ were 37.6% and 55.1%, respectively, under B100 working conditions. The extent of NOₓ removal also gradually increased as the load increased, and the average removal percentages were 8.6% and 15.0%, respectively. Both catalytic devices lowered CO emissions to a much greater extent than the bare DPF, with average removals of 45.8% and 55.6%, respectively, while the average hydrocarbon oxidation values were 39.1% and 50.9%, respectively. Notably, the hydrocarbon emissions were almost zero after Ce₁˗ₓMnₓO₂ catalysis under C100 working conditions.

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  • English

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  • Accession Number: 01749552
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 6 2020 3:31PM