| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.933 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
Comparative study of the mobility of Pd species in SSZ-13 and ZSM-5, and its implication for catalytic activity after hydro-thermal aging as Passive NOx Adsorbers (PNAs) |
| 초록 |
The comparative behavior of Pd species in ZSM-5 and SSZ-13 zeolite supports was studied. The addition of water in the feed during thermal treatment resulted in the Pd sintering in Pd/ZSM-5, although Pd dispersion and agglomeration were concurrently observed in Pd/SSZ-13. The prepared catalysts were vacuum-treated to induce the auto-reduction of atomic Pd species. The isolated Pd species in ZSM-5 were completely reduced to form large Pd clusters after vacuum treatment, while most of the Pd species in SSZ-13 remained atomically dispersed. Therefore, the different behavior of Pd/ZSM-5 and Pd/SSZ-13 against the hydrothermal treatments could be explained by the intrinsic difference in the Pd mobility. The smaller pore size of SSZ-13 than ZSM-5 seems to contribute to the lesser Pd mobility. The hydrothermal treatment deactivated the NO adsorption ability of Pd/zeolite catalysts with larger pore openings which supports the present proposal. |
| 저자 |
이재하1, 유영석1, 황성하1, 김용우1, 조성준2, 이효경3, 김창환3, 김도희1
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| 소속 |
1서울대, 2전남대, 3현대자동차 |
| 키워드 |
촉매; 반응공학
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| E-Mail |
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| 원문파일 |
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