Modification of V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> Catalyst by Loading of MnO<i><sub>x</sub></i> for Enhanced Low-Temperature NH<sub>3</sub>-SCR Performance
oleh: Xianlong Zhang, Qinchao Diao, Xiaorui Hu, Xueping Wu, Kesong Xiao, Junwei Wang
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2020-09-01 |
Deskripsi
V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> as a commercial selective catalytic reduction (SCR) catalyst usually used at middle-high temperatures was modified by loading of MnO<i><sub>x</sub></i> for the purpose of enhancing its performance at lower temperatures. Manganese oxides were loaded onto V-W/Ti monolith by the methods of impregnation (I), precipitation (P), and in-situ growth (S), respectively. SCR activity of each modified catalyst was investigated at temperatures in the range of 100–340 °C. Catalysts were characterized by specific surface area and pore size determination (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), etc. Results show that the loading of MnO<i><sub>x</sub></i> remarkably enhanced the SCR activity at a temperature lower than 280 °C. The catalyst prepared by the in-situ growth method was found to be most active for SCR.