| 학회 |
한국공업화학회 |
| 학술대회 |
2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
26권 1호 |
| 발표분야 |
포스터-촉매 |
| 제목 |
Comparative study of the mobility of Pd species in SSZ-13 and ZSM-5, and its implication for their activity as passive NOx Adsorbers (PNAs) after hydro-thermal aging |
| 초록 |
The comparative behavior of Pd species in ZSM-5 and SSZ-13 zeolites resulting from thermal treatment in the presence and absence of water was studied. Thermal treatment at 750 °C induced the atomic distribution of Pd species in ZSM-5, while clustered Pd species remained in SSZ-13. The addition of water during thermal treatment resulted in the Pd sintering in the Pd/ZSM-5 catalyst, although Pd dispersion and agglomeration were concurrently observed in the Pd/SSZ-13 catalyst. Catalysts were vacuum-treated to induce the auto-reduction of the atomic Pd species. The isolated Pd species in ZSM-5 were completely reduced to form large Pd clusters, while most of the Pd species in SSZ-13 remained atomically dispersed. It is likely that the smaller pore size of SSZ-13 than ZSM-5 contributed to the lesser Pd mobility in the former. The hydrothermal treatment deactivated the NO adsorption ability of other prepared Pd/zeolite catalysts with larger pore openings. |
| 저자 |
이재하1, 이은원1, 유영석1, 황성하1, 김용우1, 조성준2, 이효경3, 김창환3, 김도희1
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| 소속 |
1서울대, 2전남대, 3현대엔지비 |
| 키워드 |
Passive NOx adsorbers; Pd/SSZ-13; Pd/ZSM-5; water effect
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| E-Mail |
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