| 학회 | 한국화학공학회 |
| 학술대회 | 2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 | 25권 1호, p.1037 |
| 발표분야 | 촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 | Exploration of bulk-like/surface cerium sulfate species functionalization by the sulfation of SbVCT for NH3-SCR |
| 초록 | Investigation of cerium sulfate species on sulfated SbVCT catalysts at various temperatures was carried out by diffused-reflectance infrared Fourier-transform spectroscopy (DRIFTs) analysis. The catalyst sulfated at a high temperature, SbVCT (500s-1) (i.e., sulfated at 500 °C), exhibited higher NOx removal performance at low temperatures than the SbVCT (fresh) and VWTi catalysts. The in-situ DRIFTs results showed that the ionic character of SbVCT (500s-1) increased significantly, whereas SbVCT (250s-1) only had covalent character. For SbVCT (250s-1), a small amount of surface cerium sulfate species was formed. With increasing sulfation temperature, more cerium sulfate species formed as a bulk-like species, and its rate of formation increased. Surface cerium sulfate species formed at low temperatures underwent phase change to bulk-like species upon exposure to high temperatures. Catalysts containing bulk-like cerium sulfate species exhibit high SCR performance at low temperatures. Keywords: SCR, SbVCT, NOx removal, sulfation treatment, cerium sulfate |
| 저자 | 권동욱, 김종식, 김동호, 이석현, 하헌필 |
| 소속 | 한국과학기술(연) |
| 키워드 | 촉매 |
| 원문파일 | 초록 보기 |
