| Ce/Zr系列催化剂上碳颗粒物燃烧行为 |
| 摘要点击 1890 全文点击 2289 投稿时间：2004-12-03 修订日期：2005-03-04 |
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| 中文关键词 Ce-Zr固溶体 soot 催化氧化 反应气氛 |
| 英文关键词 CexZr1-xO2 solid solution soot catalytic combustion feed gas |
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| 中文摘要 |
| 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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| 英文摘要 |
| Catalytic performances of Ce/Zr series catalysts (CexZr1-xO2) 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 ((Ce0.5)Zr0.5)O2.) NO could promote soot combustion by presenting NO2, a more powerful oxidant than O2, and the ignition temperature of soot decreased 30. Results of TG and TPO show that the β species oxygen on the catalyst take part in the combustion process.
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