| 刘云.Pd/Mn/Ba/Al催化剂的NOx存储-还原性能研究[J].分子催化,2011,(3):226-232 |
| Pd/Mn/Ba/Al催化剂的NOx存储-还原性能研究 |
| A study on storage-reduction of NOx over Pd/Mn/Ba/Al catalyst |
| 投稿时间：2011-05-06 修订日期：2011-06-14 |
| DOI： |
| 中文关键词: NOx, Pd/Mn/Ba/Al, 存储, 还原 |
| 英文关键词:NOx, Pd/Mn/Ba/Al, storage, reduction |
| 基金项目: |
|
| 摘要点击次数: 964 |
| 全文下载次数: 2194 |
| 中文摘要: |
| 采用分步等体积浸渍法制备了Pd/Mn/Ba/Al系列催化剂，并用DRIFTS、TPD、TPSR等方法进行了表征，考察了催化剂在不同温度点NOx的存储量以及存储-还原循环中NOx的脱除率。结果表明，NO更容易在MnOx上形成亚硝酸盐，Mn的加入显著提高了Pd/Ba/Al的低温存储活性，与Pd/Ba/Al相比，Pd/Mn/Ba/Al在30 ℃、100 ℃、200 ℃、300 ℃的存储量分别提高了87 %、59%、32%、91%，循环实验表明，在200 ℃和300 ℃时，NOx的脱除率分别提高了5% 和37%，而在400 ℃的NOx脱除率稍有降低。 |
| 英文摘要: |
| The performance of NOx storage capacity (NSC) and the activity of storage-reduction over Pd/Ba/Al2O3 and Pd/Mn/Ba/Al2O3 catalyst were investigated at different temperatures. The Pd catalysts were prepared by incipient impregnation and characterized by TPD、TPSR and DRIFTS. The results indicated that the addition of Mn can promote the NOx storage performance of the Pd/Ba/Al catalyst at low temperatures due to the easier adsorption of NO in the form of nitrite on Mn. Therefore, the NSC increased 87 %、59 %、32 % and 91 %, respectively, at 30 ℃、100 ℃、200 ℃ and 300 ℃. The results of storage-reduction cyclings showed that the NOx conversion of Pd/Mn/Ba/Al increased 5 % and 37 % at 200 ℃ and 300 ℃，while slightly decreased at 400 ℃. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
