丙烯选择还原一氧化氮反应铜基交联黏土催化剂的研究  

Cu-based pillared clay catalysts for selective catalytic reduction of NO by propylene

作　　者：林绮纯[1] 董新法[1] 林维明[1] 

机构地区：[1]华南理工大学化工学院,广东广州510640

出　　处：《现代化工》2004年第3期39-42,共4页Modern Chemical Industry

基　　金：广东省环保局科技研究开发项目;广东省科技厅科技计划项目(2003C34501)资助

摘　　要：采用聚合羟基阳离子合成交联蒙脱土(PILC),经SO2-4改性,制备了应用于C3H6选择还原NO的铜基交联黏土催化剂。考察了交联剂种类、Cu担载量及水蒸气存在对催化剂性能的影响,并采用DTA、XRD对PILC进行表征。研究发现,Al-PILC较Zr-PILC具有较好的热稳定性;350℃时Cu/Al-PILC(Cu质量分数为3%)上NO转化率达52.0%;由于金属氧化物交联柱表面的疏水特性,Cu/Al-PILC较Cu/ZSM-5具有较强的抗水蒸气能力,10%水蒸气存在仅使NO最大转化率下降了13.7%,NO和C3H6转化曲线较不含水蒸气时向高温方向移动。Montmorillonite was pillared by oligomeric hydroxyl cation to synthesize pillared interlayered clay (PILC) and then modified by SO42-. Cu-based pillared clay catalysts were prepared and used in selective catalytic reduction of NO by propylene in the presence of oxygen. The influence of pillar agent species, Cu loading and water vapor on its catalytic properties was studied, and the structure of PILC was also characterized by using DTA and XRD. The results show that Al-PILC is better than Zr-PILC in thermal stability. The maximum conversion of NO over Cu/Al-PILC catalyst, which has a 3% of Cu mass ratio, reached 52.0% at 3501. The water tolerance of Cu/Al-PILC was higher than that of Cu/ZSM-5 due to the hydrophobic nature of oxide pillar surface. When the feed gas contained 10% water vapor, the maximum conversion of NO decreased only by 13.7%, and the conversion curves of NO and C3H6 shifted more to high temperature than those of dry conditions.

关 键 词：Cu基交联黏土 一氧化氮 丙烯 选择还原 

分 类 号：O643[理学—物理化学] X5[理学—化学]