| 학회 | 한국재료학회 |
| 학술대회 | 2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 | 17권 1호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Effects of anatase-rutile phase transition with WO3 contents on thermal stability for V2O5–WO3/TiO2 SCR catalysts |
| 초록 | Thermal stability of V2O5-WO3/TiO2 catalysts for selective catalytic reduction (SCR) of NOx was investigated in terms of phase transition of anatase-rutile. The catalysts with various WO3 contents (4, 6, 8, and 10 wt.%) were prepared by wet-impregnation method. The conversion efficiency of NOx was improved with increasing WO3 contents over 400˚C. The specific surface area as a function of WO3 contents, which is associated with efficiency of SCR catalyst was confirmed by BET method; furthermore, the suppression of grain growth was confirmed by morphology observation. In order to identify the phase transition from anatase to rutile, the structural analysis was carried out, and the increased catalytic activity by addition of WO3 was analyzed by FT-IR and Raman spectroscopy. The suppression of grain growth and phase transition in SCR catalyst was related to the crystallization by the addition of WO3 in TiO2, especially, the increase of catalytic activity was due to the phase transition. It could be concluded that the presence of WO3 disturbed the grain growth and the phase transition and therefore, the superior thermal stability was verified with high specific surface area, catalytic acidity, and phase fraction of anatase over 400˚C caused by the addition of WO3. |
| 저자 | Janghoon Kim1, Heesoo Lee2, Sanghyeon Yoon3, Byeongkil Shin4, Jungwoo Kim5, Samsik Park2, Dongwoo Shin3 |
| 소속 | 1National Core Research Center for hybrid materials solution, 2Pusan National Univ., 3Busan 609-735, 4Korea, 5School of Materials Science and Engineering |
| 키워드 | contents of WO3; thermal stability; phase transition; anatase/rutile ratio |
