| Pd/Mg(Al)O催化剂上NOx的储存 还原 |
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| 引用本文： | 何俊,陈英,李雪辉,马玉刚,陈小平,王乐夫.Pd/Mg(Al)O催化剂上NOx的储存 还原[J].燃料化学学报,2006,34(3):348-352. |
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| 作者姓名： | 何俊 陈英 李雪辉 马玉刚 陈小平 王乐夫 |
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| 作者单位： | 1. School of Chemical Engineering and Energy, South China University of Technology, Guangzhou 510640; 2. Maoming College， Maoming 525000, China |
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| 基金项目： | 国家自然科学基金;广东省自然科学基金;广东省科技厅科技计划 |
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| 摘 要： | 采用共沉淀-浸渍法制备了催化剂Pd/Mg(Al)O，并用XRD、TPD等手段进行了表征。考察了催化剂的NOx储存 还原性能。结果表明，NO在Pd/Mg(Al)O上的主要储存途径是Pd促进NO氧化生成NO2，NO2与Mg(Al)O作用成盐，放出NO；Pd对NO2吸附成盐影响不大。NO在Pd/Mg(Al)O上吸附储存的适宜温度为350℃。350℃下Pd/Mg(Al)O催化剂经15次储存 还原（以H2为还原剂），NOx储存量变化不超过8％，维持在300μmol·g－1以上，N2选择性维持在94％以上。
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| 关 键 词： | Mg(Al)O NOx 储存 还原 钯 |
| 文章编号： | 0253-2409（2006）03-0348-05 |
| 收稿时间： | 2005-09-20 |
| 修稿时间： | 2006-02-03 |
NOx storage-reduction on Pd/Mg(Al)O catalyst |
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| HE Jun,CHEN Ying,LI Xue-hui,MA Yu-gang,CHEN Xiao-ping,WANG Le-fu.NOx storage-reduction on Pd/Mg(Al)O catalyst[J].Journal of Fuel Chemistry and Technology,2006,34(3):348-352. |
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| Authors: | HE Jun CHEN Ying LI Xue-hui MA Yu-gang CHEN Xiao-ping WANG Le-fu |
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| Abstract: | The storage-reduction behavior of NOx(NO and NO2) on Pd/Mg(Al)O catalyst prepared by co-precipitation followed by impregnation, was investigated in a fixed-bed reactor at atmosphere and different temperatures. The catalyst was characterized by XRD and TPD. The main path of NO storage on Pd/Mg(Al)O is that Pd firstly catalyzes NO and O2 to form NO2, NO2 then reacts with Mg(Al)O to form nitrate and NO. Pd showes little effect on the formation of nitrate from NO2 on catalysts. The NOx storage capacity on Pd/Mg(Al)O has a maximum at 350℃ for NO. At this temperature the NOx storage capacity of the catalyst prepared is no less than 300μmol·g－1, and the selectivity of H2 reducing nitrate to N2 is higher than 94% even if the catalyst is performed in 15 storage-reduction cycles. |
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| Keywords: | Mg(Al)O NOx |
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