| Nd2O3基复合氧化物上炭黑和NOx的同时催化去除特性 |
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| 引用本文： | 运新华,上官文峰.Nd2O3基复合氧化物上炭黑和NOx的同时催化去除特性[J].化工学报,2006,57(1):36-40. |
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| 作者姓名： | 运新华 上官文峰 |
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| 作者单位： | 上海交通大学机械与动力工程学院燃烧与环境技术研究中心，上海 200030 |
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| 摘 要： | 利用程序升温反应（TPR）技术，对同时催化去除柴油机炭黑和氮氧化物反应进行了研究.结果表明：稀土金属氧化物及其负载金属氧化物能在富氧条件下使炭黑（C）和氮氧化物（NOx）互为氧化还原，主要生成CO2和N2，达到C-NOx两者的同时催化去除.在Nd2O3等稀土氧化物上负载K和Mn等金属氧化物能降低炭黑的起燃温度，提高NO的还原转化率，其中K/Mn/Nd2O3 上的催化反应同无催化反应相比，其炭黑起燃温度降低了170℃，最大NO→N2转化率达到75.4％.K能显著降低起燃温度，并存在最佳负载量（2 mmol•g-1）.K负载量过多，可能导致稀土金属氧化物上原有活性位的覆没.
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| 关 键 词： | 炭黑 氮氧化物 催化 同时去除 稀土金属氧化物 |
| 文章编号： | 0438-1157（2006）01-0036-05 |
| 收稿时间： | 12 23 2004 12:00AM |
| 修稿时间： | 2004-12-232005-03-31 |
Simultaneous catalytic removal of soot and NOx over Nd2O3-based complex catalysts |
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| YUN Xinhua,SHANGGUAN Wenfeng.Simultaneous catalytic removal of soot and NOx over Nd2O3-based complex catalysts[J].Journal of Chemical Industry and Engineering(China),2006,57(1):36-40. |
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| Authors: | YUN Xinhua SHANGGUAN Wenfeng |
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| Abstract: | Simultaneous catalytic removal of soot particulate and NOx in the presence of excess oxygen was investigated over Nd2O3-based metal oxides by using temperature programmed reaction (TPR).The catalytic performance depended significantly on loaded metal oxides, in which the catalyst containing potassium oxide- and manganese oxide-supported neodymium oxide(K/Mn/Nd2O3) was the best catalyst in the study. As a result, the ignition temperature of soot was reduced from 500℃ to 330℃, and the conversion efficiency of NOx to N2 was increased to 75.4%. Potassium oxide promoted obviously the catalytic activities, especially in decreasing the ignition temperature of soot. The amount of potassium oxide had an optimum ［2 mmol•(g rare earth oxide)-1］, and too much loading of potassium oxide might cause the covering of active sites of the rare earth oxide. |
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| Keywords: | soot NOX catalysis simultaneous removal rare earth oxides |
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