Abstract
Three types of platinum catalysts, Pt/SiO2, Pt/γ-Al2O3 and Pt/ZrO2 were examined for the oxidation of NO to NO2 of SO2 to SO3. The activity order for both oxidation reactions was found to be: Pt/SiO2>Pt/γ-Al2O3>Pt/ZrO2. The effect of Pt loading and Pt dispersion on the catalytic activity and selectivity was examined. Over Pt/SiO2, the specific activities were found to be strongly size-dependent, the larger Pt particles exhibiting higher specific activity than the smaller ones. Over the Pt/γ-Al2O3 catalysts, however, the size-dependence appeared to be much less significant than that of the Pt/SiO2 catalysts. The results for Pt/ZrO2 catalysts, however, showed that the specific activities for both reactions were most probably size-independent. The catalytic selectivity for the oxidation of NO relative to that of SO2 appeared to be size-independent for all the catalysts. The interaction of NO, NO2 and SO2 with the catalysts and the effect of the support on the interaction were investigated using TPD technique.
| Original language | English |
|---|---|
| Pages (from-to) | 65-79 |
| Number of pages | 14 |
| Journal | Applied catalysis B: environmental |
| Volume | 11 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1996 |
Keywords
- METIS-105548
- IR-10210
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Xue, E., Seshan, K., & Ross, J. R. H. (1996). Roles of supports, Pt loading and Pt dispersion in the oxidation of NO to NO2 and of SO2 to SO3. Applied catalysis B: environmental, 11(11), 65-79. https://doi.org/10.1016/S0926-3373(96)00034-3