| Ce/Zr系列催化剂上碳颗粒物燃烧行为 |
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| 引用本文： | 朱玲,王学中,郝郑平.Ce/Zr系列催化剂上碳颗粒物燃烧行为[J].环境科学,2005,26(5):7-7-11. |
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| 作者姓名： | 朱玲 王学中 郝郑平 |
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| 作者单位： | 1. 中国科学院生态环境研究中心,北京,100085
2. 中国环境科学研究院,北京,100012 |
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| 基金项目： | 国家高技术研究发展计划(863)项目(2001AA324050);国家重点基础研究发展规划(973)项目(2004CB719500) |
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| 摘 要： | 分别在TG和TPO上考察了CeO2,ZrO2及不同Ce/Zr比的CexZr1-xO2固溶体催化剂上soot的燃烧性能,同时考察了反应气氛对活性的影响.结果表明:Ce基催化剂能明显降低soot的起燃温度,Ce/Zr比的不同导致CexZr1-xO2催化剂性能的差异.反应的速度控制步骤随O2浓度的不同而改变;H2O对Ce0.5Zr0.5O2上soot的氧化活性基本没有影响;由于NO氧化产生的NO2具有更强的的氧化能力,因此NO对soot的燃烧具有促进作用,起燃温度降低了30℃.催化剂上的β氧种参与了soot燃烧过程.
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| 关 键 词： | Ce-Zr固溶体 soot 催化氧化 反应气氛 |
| 文章编号： | 0250-3301（2005）05-0007-05 |
| 收稿时间： | 2004-12-03 |
| 修稿时间： | 3/4/2005 12:00:00 AM |
Catalytic Performance of Ce/Zr Series Catalysts on Soot Combustion |
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| ZHU Ling,WANG Xue-zhong and HAO Zheng-ping.Catalytic Performance of Ce/Zr Series Catalysts on Soot Combustion[J].Chinese Journal of Environmental Science,2005,26(5):7-7-11. |
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| Authors: | ZHU Ling WANG Xue-zhong and HAO Zheng-ping |
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| Institution: | 1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 2. Chinese Research Academy of Environmental Science, Beijing 100012, China |
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| Abstract: | Catalytic performances of Ce/Zr series catalysts (Ce(x)Zr(1-x)O2) on soot combustion and the influence of feed gas were investigated by TG and TPO. The catalytic activity is high, and affects by the Ce/Zr ratio. The concentration of O2 affects the speed-limited step during the process of soot combustion. H2O showed no effect on the catalytic activity for soot combustion on Ce(0.5)Zr(0.5)O2. NO could promote soot combustion by presenting NO2, a more powerful oxidant than O2, and the ignition temperature of soot decreased 30 degrees C. Results of TG and TPO show that the beta species oxygen on the catalyst take part in the combustion process. |
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| Keywords: | CexZr1-xO2 solid solution soot catalytic combustion feed gas |
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