• 关键词：一氧化氮  催化氧化  Mn/Co-Ba-Al-O

• 基金项目：

• 莫建红
• 湘潭大学环境工程系, 湘潭 411105

• 童志权
• 湘潭大学环境工程系, 湘潭 411105

• 张俊丰
• 湘潭大学环境工程系, 湘潭 411105

• 摘要：采用共沉淀-浸渍法制备了Mn/Co-Ba-Al-O催化剂.考察了用共沉淀法制作载体Co-Ba-Al-O过程中加料顺序分别为正加法、反加法和并流法时催化剂的活性.BET测试和XRD分析表明,并流时制得的载体比表面积最大,且其中的γ-Al₂O₃结晶度最好,不含BaCO₃,对NO的催化氧化性能最好.考察了各操作条件对并流法制备的催化剂催化氧化NO效率的影响,结果显示,在NO体积分数为500×10^-6,O₂

• Abstract：Mn/Co-Ba-Al-Ocatalyst was prepared by coprecipitation and impregnation. The effect of precipitation methods of preparing Co-Ba-Al-Ocarrier, including normal, reverse and parallel-flow precipitation methods, on the activity of the catalyst was investigated. The results of BETtesting and XRDanalysis show that the parallel-flow precipitation method is the best way to obtain the most effective carrier. In this case, the surface area of the carrier is much larger than that of the other two products, and the γ-Al₂O₃ has the best crystallinity. BaCO₃ does not exist in the carrier. The effect of the catalyst prepared by parallel-flow precipitation method on catalytic oxidation of nitric oxide depends on such factors as space velocity, temperature and volume fraction of NO and O₂ When the volume fraction of feeding NO is 500×10^-6, O₂ 10%, space velocity 4000 h^-1, the rate of oxidation reached 50%～60% at 225℃, and the highest absorption efficiency is gained. At a temperature of 300℃, the rate of oxidation is about 83%, almost equal to the thermodynamic equilibrium value.

• Key words：nitric oxide  catalytic oxidation  Mn/Co-Ba-Al-O

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