| 학회 | 한국화학공학회 |
| 학술대회 | 2005년 봄 (04/22 ~ 04/23, 여수대학교) |
| 권호 | 11권 1호, p.948 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | Catalytic Activity and Hydrothermal Stability of Cu-ZSM5 Catalyst for the Reduction of NO by Urea-SCR: ESR and XAFS Studies |
| 초록 | Cu-ZSM5 has been reported as one of the most promising catalysts for the selective catalytic reduction of NOx from light and heavy diesel engines with urea. However, the hydrothermal stability of the catalyst may be another critical issue to be resolved for the commercial application of urea-SCR technology to automotive engine. In order to elucidate the hydrothermal stability of Cu-ZSM5 by urea-SCR, NO removal activity of a series of the catalyst containing a variety of copper contents ranged from 1 to 5 wt. % has been examined after sintered at high reaction temperature in the presence of 10 % water. The catalysts before and after aging, have been characterized by XAFS, ESR, etc., in order to understand the deactivation mechanism. XAFS and ESR spectra of the catalysts clearly reveal that the square pyramidal Cu2+ ions in the framework of ZSM5 migrate to another isolated cupric site. This population change may be responsible for the hydrothermal stability of Cu-ZSM5 catalyst for urea-SCR process. |
| 저자 | 박주형1, 박혜준1, 백준현1, 남인식1, 신채호2, 이종환3, 조병권3, 오세혁3 |
| 소속 | 1포항공과대, 2충북대, 3General Motors R&D Planning Center |
| 키워드 | hydrothermal stability; urea-scr; esr; XAFS |
| 원문파일 | 초록 보기 |
