The effect of Si poisons on Co3O4-CeO2 catalyst: comparison with a Pt/Al2O3 catalyst
Keywords:odor control, Si poison, Co3O4-CeO2, honeycomb catalyst, noble metal free
The effect of Si poison on conventional Pt/Al2O3 catalyst and newly developed Co3O4-CeO2 catalyst have been investigated. The effect of Si poison deactivation on the Co3O4-CeO2 catalyst was smaller than that on the Pt/Al2O3 catalyst. Hexamethyldisilazane (HMDS) was used as a model compound to simulate gaseous silicon poisoning. It was suggested that the small amount of Si species (except SiO2) negatively influenced the Pt catalyst activity. Most of the HMDS was converted into SiO2 during the reaction, which covered the surface of both catalysts. The SiO2 was removed when the catalysts were subjected to air blowing treatment.
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