| 학회 |
한국화학공학회 |
| 학술대회 |
2020년 가을 (10/14 ~ 10/16, e-컨퍼런스) |
| 권호 |
26권 1호, p.868 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Understanding the catalytic deactivation of cyclic lean/rich aged Cu/CHA by investigation of copper metal sintering under modified aging conditions |
| 초록 |
Cu/CHA catalyst has already been commercialized as a selective catalytic reduction (SCR) catalyst for NOx abatement on diesel vehicles. However, the SCR catalyst bed in a typical diesel emission control system is placed very close to the diesel particulate filter (DPF), which is repeatedly exposed to periodic oxidizing/reducing conditions, resulting in a drastic deactivation. The crystallinity and textural properties of lean/rich aged Cu/CHA catalyst were well maintained after severe aging. On the other hand, the copper sintering was observed from TEM and HAADF-STEM. Consequently, the catalytic deactivation of the cyclic lean/rich aged Cu/CHA catalyst is thought to be due to copper sintering from the formation of local hot spot rather than the structural collapse of the zeolite support during the change from reducing to oxidizing condition. In this study, we intend to understand the copper sintering of lean/rich aged Cu/CHA catalyst under modified aging conditions which introduces the step of purging with inert gas between oxidizing and reducing conditions and to find solution to suppress copper sintering. |
| 저자 |
박순희1, Chang Shuai2, 신경수2, 이관영1, 조성준2
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| 소속 |
1고려대, 2전남대 |
| 키워드 |
촉매 |
| E-Mail |
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| 원문파일 |
초록 보기 |
