| CuxCe1-xO2-x/SBA-15/堇青石整体式催化剂及其CO催化氧化性能 |
| Preparation, Characterization and CO Catalytic Oxidation Performance of CuxCe1-xO2-x/SBA-15/Cordierite Monolithic Catalysts |
|
| 摘要: 以堇青石蜂窝陶瓷为载体, CuxCe1-xO2-x/SBA-15为催化活性组分, 制备了一系列10%~60%Cu0.5Ce0.5O1.5/SBA-15/堇青石和50%CuxCe1-xO2-x/SBA-15/堇青石(x=0~1)整体式催化剂, 采用低温氮吸附－脱附、XRD、XPS和H2-TPR对催化剂进行了表征, 在微型固定床反应器中评价了催化剂的CO催化氧化活性。结果表明:整体式催化剂仍然保持SBA-15的介孔结构, 催化剂中除了堇青石的物相外, 还有CuO和CeO2物相, 催化剂表面的Cu以Cu2+和Cu+两种状态存在, Ce以Ce4+状态存在, 催化剂表面的氧化还原性能与Cu0.5Ce0.5O1.5的含量和Cu、Ce的比例有一定的关系, 50%Cu0.5Ce0.5O1.5/SBA-15/堇青石催化剂具有最好催化活性, CO可以在140℃完全转化。 |
| 关键词: 堇青石 整体式催化剂 CuxCe1-xO2-x CO催化氧化 |
| 基金项目: 国家自然科学基金(No.20473009)资助项目。 |
| Abstract: Cu0.5Ce0.5O1.5/SBA-15/cordierite monolithic catalysts with the Cu0.5Ce0.5O1.5 content from 10% to 60% and 50%CuxCe1-xO2-x/SBA-15/cordierite (x=0~1) monolithic catalysts were prepared using the cordierite as the support and the CuxCe1-xO2-x/SBA-15 as the catalytic component. The catalysts were characterized using Low Temperature Nitrogen Adsorption-Desorption, XRD, XPS and H2-TPR. The catalytic activity of the catalysts for the oxidation of CO was evaluated. The results indicate that the mesoporous structure of SBA-15 is retained in the monolithic catalysts. There are the CuO and CeO2 phases in addition to the cordierite phase. On the surface of the catalyst Cu exists as Cu2+ and Cu+ species and Ce is as Ce4+ species. The redox performance of the monolithic catalysts is related with the Cu0.5Ce0.5O1.5 content and the ratio of the Cu and Ce in the CuxCe1-xO2-x/SBA-15. 50%Cu0.5Ce0.5O1.5/SBA-15/cordierite monolithic catalyst exhibits the best catalytic activity. CO can be completely oxidized at 140℃. |
| Keywords: Cordierite Monolithic catalysts CuxCe1-xO2-x CO oxidation |
| 投稿时间：2012-03-16 修订日期：2012-04-26 |
| 摘要点击次数: 2539 |
| 全文下载次数: 2782 |
| 赵福真,曾鹏辉,季生福.CuxCe1-xO2-x/SBA-15/堇青石整体式催化剂及其CO催化氧化性能[J].无机化学学报,2013,29(4):753-759. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
