Substitution of WO3 in V2O5/WO3-TiO2 by Fe2O3 for selective catalytic reduction of NO with NH3
Yang, S; Wang, C; Ma, Lei; Peng, Yue; Qu, Zan; Yan, N; Chen, J; Chang, H; Li, J
| HERO ID | 1574855 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Substitution of WO3 in V2O5/WO3-TiO2 by Fe2O3 for selective catalytic reduction of NO with NH3 |
| Authors | Yang, S; Wang, C; Ma, Lei; Peng, Yue; Qu, Zan; Yan, N; Chen, J; Chang, H; Li, J |
| Volume | 3 |
| Issue | 1 |
| Page Numbers | 161-168 |
| Abstract | To improve N-2 selectivity and lower the cost, WO3 in V2O5/WO3-TiO2 was substituted by a low cost composition Fe2O3 for selective catalytic reduction (SCR) of NO with NH3. The SCR reaction over V2O5/Fe2O3-TiO2 mainly followed the Eley-Rideal mechanism (i.e. the reaction between activated ammonia species and gaseous NO). There were two active components on V2O5/WO3-TiO2 for the activation of adsorbed NH3 (i.e. V5+ and Fe3+). The acid sites on V2O5/Fe2O3-TiO2 mainly resulted from the support Fe2O3-TiO2, so the adsorbed NH3 preferred to be activated by Fe3+ rather than by V5+. V5+ on V2O5/Fe2O3-TiO2 could accelerate the regeneration of Fe3+ on Fe2O3-TiO2 due to the rapid electron transfer between V5+ and Fe2+ on the surface, so the activation of adsorbed NH3 by Fe3+ was promoted. As some NH3 adsorbed on V2O5/Fe2O3-TiO2 was not activated by Fe3+, the inactivated NH3 could then be activated by V5+ on the surface. As a result, 2% V2O5/Fe2O3-TiO2 showed excellent SCR activity, N-2 selectivity and H2O/SO2 durability at 300-450 degrees C. Furthermore, the emission of 2% V2O5/Fe2O3-TiO2 to the fly ash can be prevented by an external magnetic field due to its inherent magnetization. Therefore, 2% V2O5/Fe2O3-TiO2 could be a promising low-cost catalyst in NO emission control. |
| Doi | 10.1039/c2cy20383a |
| Wosid | WOS:000311969200019 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000311969200019 Journal:CATALYSIS SCIENCE & TECHNOLOGY 2044-4753 |
| Is Public | Yes |