PM Control with Low NO2 Tailpipe Emissions by Systems with Non-PGM Catalyzed DPF for Passive Soot Regeneration

Paper #:
  • 2010-01-0563

Published:
  • 2010-04-12
DOI:
  • 10.4271/2010-01-0563
Citation:
Iretskaya, S., Golden, S., Tadrous, T., and Long, S., "PM Control with Low NO2 Tailpipe Emissions by Systems with Non-PGM Catalyzed DPF for Passive Soot Regeneration," SAE Technical Paper 2010-01-0563, 2010, https://doi.org/10.4271/2010-01-0563.
Pages:
9
Abstract:
Non-PGM catalyst containing base metal mixed oxide (BMMO) supported on rare earth mixed oxide (REMO) had been evaluated by various methods for soot-oxidation activity. Thermo-gravimetric/Differential Thermal Analysis (TG/DTA) experiments and synthetic gas bench activity tests showed that the catalyst was able to oxidize soot at temperatures significantly lower than soot combustion temperature leading to a conclusion that soot was oxidized via direct reaction with active species of the catalyst surface. It had been shown that low-temperature soot oxidation occurred with and without NO present in the reaction gas. Evaluation on engine benches of the BMMO catalyst coated on diesel particulate filters (DPF) confirmed low-temperature soot oxidation in exhaust gas with low NO₂ concentration and a possibility of cost-efficient diesel exhaust aftertreatment system without increasing tailpipe NO₂ content.
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