| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Effects of different precursors on the surface Mn species over MnOx/TiO2 for Low-temperature SCR of NOx with NH3 |
| 초록 | The selective catalytic reduction (SCR) of NOx with NH3 is an effective method for the removal of NOx from stationary system. The typical catalyst for this method is V2O5–WO3(MoO3)/TiO2, caused by the high activity and stability. However, This catalyst is active within 300-400℃ and occurs the pore plugging from the deposition of ammonium sulfate salts on the catalysts surface. It needs to locate the SCR unit after the desulfurizer and electrostatic precipitator without reheating of the flue gas as well as deposition of dust on the catalyst. The manganese oxides supported on titania catalysts have attracted interest because of its high SCR activity at low temperature. The catalytic activity of MnOx/TiO2 SCR catalyst with different manganese precursors have investigated for low-temperature SCR in terms of structural, morphological, and physico-chemical analyses. The MnOx/TiO2 were prepared from three different precursors such as manganese nitrate, manganese acetate(Ⅱ), and manganese acetate(Ⅲ) by the sol-gel method and then it calcinated at 500℃ for 2 hr. The structural analysis was carried out to identify the phase transition and the change intensity of catalytic activity by various manganese precursors was analyzed by FT-IR and Raman spectroscopy. These different precursors also led to various surface Mn concentrations indicated by SEM. The Mn acetate(Ⅲ) tends to be more suppressive the crystalline phase(rutile), and it has not only smaller particle size, but also better distributed than the others. It was confirmed that the catalytic activity of MA(Ⅲ)–MnOx/TiO2 was the highest among them. |
| 저자 | Janghoon Kim, Sanghyun Yoon, Heesoo Lee |
| 소속 | 부산대 |
| 키워드 | temperature SCR; MnOx-TiO2 catalysts; manganese precursors; catalytic activity |
