| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 |
20권 2호, p.2128 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Effect of CZO loading on catalytic performance of Rh-based TWCs |
| 초록 |
Recently, cerium-zirconium oxide (CZO) has been employed as an alternative support of the Rh-based TWC to Al2O3 for stabilizing Rh by preventing the formation of inactive Rh-aluminate. In the present study, the effect of the CZO content on the catalytic performance of both commercial and lab-prepared model Rh/CZO TWCs has been systematically investigated under the sweep test condition (0.7-1% O2, 1.0 Hz). For the 4k-mile stabilized catalysts, the TWC performance of both the commercial and lab-prepared model Rh/CZO was insensitive to the catalyst CZO loading varied from CZO20 (Ce:0.62 wt.% & Zr: 1.35 wt.%) to CZO140 (Ce:4.42 wt.% & Zr:8.86 wt.%). However, the TWC performance of the 100k-mile aged Rh/CZO catalyst with respect to the CZO loading was in the following decreasing order: CZO140 ≈ CZO100 ＞ CZO60 ＞ CZO20. As confirmed by CO-chemisorption and OSC analysis, the optimum CZO content in the Rh/CZO TWC is CZO100 (Ce: 3.48 wt.% and Zr: 6.87 wt.%), which plays the critical role in maintaining the durability of the TWC performance upon the thermal aging. |
| 저자 |
임종빈1, 강성봉1, 김지호1, 남인식1, 조병권1, 김창환2, 오세혁2
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| 소속 |
1POSTECH 화학공학과 / POSTECH 환경공학부, 2General Motors R&D Planning Center |
| 키워드 |
TWC; Rh/CZO; Sintering; CZO loading
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| E-Mail |
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| 원문파일 |
초록 보기 |
