| 학회 |
한국화학공학회 |
| 학술대회 |
2020년 가을 (10/14 ~ 10/16, e-컨퍼런스) |
| 권호 |
26권 1호, p.819 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
NOx storage over Pd/CeO2 and Pd/SSZ-13 for cold start applications |
| 초록 |
Automobile after-treatment systems are being developed to meet the regulations. Therefore, state-of-the-art exhaust catalysts work effectively to convert most pollutants. However, pollutants released during the cold-start period, when the catalytic converts have not reached the proper operating temperature, are not effectively converted. Passive NOx adsorbers (PNA) are attracting attention as a potential solution. The PNA can store the NOx emitted during the cold-start period and then release the NOx once the catalysts are sufficiently heated to convert NOx. Metal oxides and zeolites combined with precious metals have been widely studied as the PNA materials. It is advantageous to compare metal oxide based PNAs and zeolite based PNAs because they operate in a similar manner but with different NOx adsorption and desorption mechanisms. In this work, Pd/CeO2 and Pd/SSZ-13 are compared by various methods. Adsorption sites and mechanisms were identified using different NO/NO2 ratios for adsorption tests. Effect of CO treatment and sulfur poisoning was also investigated on both samples. |
| 저자 |
황성하1, 김용우1, 이재하1, 이효경2, 김창환2, 김도희1
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| 소속 |
1서울대, 2현대자동차 |
| 키워드 |
촉매 |
| E-Mail |
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| 원문파일 |
초록 보기 |
