| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50503 | Catalysis Communications | 2013 | 5 Pages |
•RuOx/SiO2 showed the highest activity for soot oxidation in fluidized bed reactor.•The adsorbed NO on RuOx was easily dissociated to adsorbed N and O. The adsorbed O could further oxidize soot.•NOx decomposition was inhibited by the consumption of adsorbed NO and NO2 in soot oxidation.•High activity in fluidized bed was due to its high mass transferring of active species.
The potentialities of RuOx/SiO2 for soot oxidation have been investigated using a temperature programmed reaction technique. Among the noble metal catalysts, RuOx/SiO2 exhibited the highest activities in fluidized bed reactor. The temperature at 50% soot conversion over RuOx/SiO2 in the presence of NO and O2 is about 120 K lower than that only in the presence of O2. It has been identified that NO was adsorbed on the surface of RuOx in the presence of O2. The adsorbed NO was highly active for oxidizing soot, which can be attributed to the high mass transferring of the active species in the reaction systems. The mechanism of NO dissociation is also discussed in soot oxidation.
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