| Cu-Mg-Al催化剂上NOx储存及分解性能研究 |
| 摘要点击 1695 全文点击 972 投稿时间：2006-04-14 修订日期：2006-11-22 |
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| 中文关键词 氮氧化物 储存 贫燃 水滑石复合氧化物 |
| 英文关键词 nitrogen oxide storage lean burn hydrotalcite mixed oxide |
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| 中文摘要 |
| 采用共沉淀方法制备了Cu-Mg-Al水滑石混合氧化物催化剂，并对该催化剂及其前驱物进行了XRD表征.使用等温吸附、程序升温脱附以及C3H6程序升温表面反应分别考察了催化剂上NOx储存及分解反应性能.结果表明，由于Cu-Mg-Al催化剂中CuO组分发挥了NO氧化作用，促进了进气中NOx以硝酸盐方式吸附在催化剂上，因此该催化剂具有很好的NOx储存性能；在富燃条件下，C3H6能够显著降低催化剂上硝酸盐的热稳定性，在160～360 ℃温度范围内，这些硝酸盐会迅速分解成气态NOx，同时随着C3H6加入量的提高，C3H6也可以将少量气态NOx进行还原. |
| 英文摘要 |
| Cu-Mg-Al hydrotalcite mixed oxide was prepared by co-precipitation. The mixed oxide and its procurer were characterized by XRD. NOx storage performance and decomposition of the stored NOx over the catalyst were investigated by NOx storage experiment at constant temperature, temperature programmed desorption (TPD) and temperature programmed surface reaction (TPSR), respectively. The results indicate that Cu-Mg-Al hydrotalcite mixed oxide has a good performance of NOx storage. The formed nitrate can be decomposed to gaseous NOx rapidly in the investigated temperature range of 160～360 ℃, and a small amount of gaseous NOx can be reduced by C3H6 with increasing the concentration of C3H6 in the inlet gas. |
