Journal
JOURNAL OF RARE EARTHS
Volume 26, Issue 6, Pages 827-830Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(09)60015-6
Keywords
three-way catalyst; durability; redox property; emission control regulations; rare earths
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Funding
- 863 Program [2006AA060305]
- China Postdoctoral Science Foundation [20070410196]
- Jiangsu Province Planned Projects for Postdoctoral Research Funds [0702054C]
- Jiangsu Province Natural Science Fund [BK2008532]
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The durability of three-way catalyst (TWC) and corresponding close-coupled catalyst (CCC) for Euro IV stage regulation was investigated through Vehicle Road Running Mode tests, whereas emissions of regulated pollutants of three car fleet were investigated at every 100,000 km miles. The results showed that HC, NOx, and CO emission values could meet Euro IV regulation limits at every point. The redox properties of TWC and CCC were measured by CO reduction during each isothermal. It was obvious that both aged TWC and aged CCC behaved a good redox property at 673 and 773 K. Based on XRD and BET measurement results, TWC and CCC washcoat were characterized with good thermal stability.
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