| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 봄 (04/22 ~ 04/24, 제주 ICC) |
| 권호 |
21권 1호, p.1089 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Ce/Zr ratio effect in Pd supported catalyst for sulfur resistance |
| 초록 |
To satisfy emission standard, diesel engine has adopted diesel oxidation catalyst (DOC) which converts unburned CO and HCs to CO2 and H2O. Improvement of catalytic performance at low temperature is essentially required. In addition to the thermal stability, the sulfur resistance is a challenging issue for the proper operation of catalyst. Pd plays a key role as an active site for oxidation. Moreover, it is known that Pd has excellent synergistic effect on oxidation when CeO2 is used as support. CeO2 support is able to provide high dispersion of Pd and, moreover, to promote the oxidation activity due to its characteristic oxygen storage capacity (OSC). However, CeO2 is prone to be deactivated by hydrothermal treatment. In addition, it is reported that SO2 easily degrades catalytic property of CeO2. There have been a number of studies to maintain CeO2 property against thermal deterioration and sulfur poisoning. Among the various solid solution materials, (Ce-Zr)O2 presents high thermal stability and OSC ability. This study aims at interpreting the effect of ZrO2 in Pd/(Ce-Zr)O2 catalysts with various Ce/Zr ratios compared to Pd/CeO2, especially focusing on the effect of sulfur poisoning & regeneration treatment on the catalyst. |
| 저자 |
유영석1, 이재하1, 이효경2, 정진우2, 김창환2, 김도희1
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| 소속 |
1서울대, 2현대자동차 |
| 키워드 |
Ceria; Pd catalyst; sulfur; zirconia; diesel oxidation catalyst
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| E-Mail |
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| 원문파일 |
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