| 학회 | 한국화학공학회 |
| 학술대회 | 2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 | 25권 2호, p.1963 |
| 발표분야 | 촉매 및 반응공학 (Catalysis and Reaction Engineering) |
| 제목 | Iron-Exchanged High-Silica LTA Zeolites as Hydrothermally Stable NH 3 -SCR Catalysts |
| 초록 | The catalytic properties of iron-exchanged LTA and SSZ-13 zeolites with different Si/Al (11-23) and Fe/Al (0.18-0.37) ratios hydrothermally aged at 750-900 °C have been investigated in the selective catalytic reduction of NO x by NH 3 (NH 3 -SCR). When the zeolite support possesses the same bulk ratio (16), each fresh Fe-LTA catalyst always exhibits a higher NO conversion than the corresponding Fe-SSZ-13 catalyst with a similar Fe/Al ratio in the reaction temperature range studied. Hydrothermal aging at 900 °C led to a noticeable decrease in NH 3 -SCR performance of both series of catalysts. However, the extent of the decrease was found to be considerably smaller in the Fe-LTA series. This allows each of the Fe-LTA series to outperform even Fe-beta, which is known as the most hydrothermally stable among the iron-exchanged zeolite catalysts tested so far. The overall characterization results of this study reveal that the active iron species (e.g., isolated Fe3+ ions and small oligomeric Fe x O y species) in Fe-LTA are more stable than those in Fe-SSZ-13, mainly due to notable differences in their iron ion sites. |
| 저자 | 류태경 , 강연주 , 남인식 , 홍석봉 |
| 소속 | 포항공과대 |
| 키워드 | 촉매 ; 반응공학 |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
