Durability of three-way and close-coupled catalysts for Euro IV regulation |
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| Authors: | Liwei JIA Meiqing SHEN Jun WANG Jiaming WANG Xia CHU Weiwei GU |
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| Affiliation: | aKey Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;bWeifu Environmental Catalysts Co., Ltd., Wuxi 214028, China |
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| Abstract: | 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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| Keywords: | three-way catalyst durability redox property emission control regulations rare earths |
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