| 학회 | 한국공업화학회 |
| 학술대회 | 2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 | 25권 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 after thermal treatment was studied. The thermal treatment at 750°C induced 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 Pd/ZSM-5, although Pd dispersion and agglomeration were concurrently observed in Pd/SSZ-13, depending on the Pd loading. After the vaccum treatment, the isolated Pd species in ZSM-5 were completely reduced to form large Pd clusters. However, most of the Pd species in SSZ-13 remained atomically dispersed, indicating that the Pd mobility is higher in the former than in the latter. The different behavior of Pd/ZSM-5 and Pd/SSZ-13 against various treatments could be explained by the intrinsic difference in the Pd mobility within the different types of zeolite. It is likely that the smaller pore size of SSZ-13 than ZSM-5 contributed to the lesser Pd mobility. |
| 저자 | 이재하, 이은원, 황성하, 김도희 |
| 소속 | 서울대 |
| 키워드 | zeolite; PNAs; Pd mobility |
