Me-ZSM-5/堇青石催化剂上氮氧化物的选择还原
Selective Catalytic Reduction of Nitric oxide over Me-ZSM-5/cortierite Monolith
ZSM-5分子筛原位生长在堇青石载体上，形成ZSM-5/堇青石整体。不同阳离子交换的ZSM-5/堇青石被用于过量氧气存在条件下丙烷选择催化还原氮氧化物反应的催化剂。与In-ZSM-5/堇青石和La-ZSM-5/堇青石相比，Cu-ZSM-5/堇青石表现出最高的催化活性。在我们的试验条件下，500 ℃时，NO的最高转化率可以达到59 %。在对反应机理的讨论中，活性组分的氧化能力被认为是影响催化剂活性众多因素中最重要的一个。一方面，活性组分的氧化能力强弱直接决定反应中间体NOx (ads)形成的方式和速度；另一方面，活性组分氧化能力可以影响反应体系中主副反应发生的比例，也影响催化剂的活性。
SM-5 zeolite was in-situ synthesized successfully on the surface of honeycomb cordierite substrate to form ZSM-5/cordierite monolith. Different cation exchanged ZSM-5/cordierites were studied as catalysts for selective catalytic reduction (SCR) of nitric oxide (NO) by propane in excess oxygen. Compare to In-ZSM-5/cordierite and La-ZSM-5/cordierite, Cu-ZSM-5/cordierite exhibited the highest catalytic activity and NO conversion over Cu-ZSM-5/cordierite could reach 59 % at the temperature of 500 ℃ in our experiment conditions. In the discussion of reaction mechanism, the oxidative activity of the activating component is thought to be the most important factor among many. On one side, the oxidative activity of the activating component directly determine the pathway and formation rate of reaction intermediate NOx (ads). On the other side, the oxidative activity of the activating component has influence on the ratio between main reaction and side reaction, which will also influence the deNO
李兰冬、关乃佳
非金属元素化学工业、非金属无机化合物化学工业精细化学工业
氮氧化物，选择催化还原，ZSM-5/堇青石，丙烷
nitric oxide selective catalytic reduction propane
李兰冬,关乃佳.Me-ZSM-5/堇青石催化剂上氮氧化物的选择还原[EB/OL].(2004-11-24)[2025-08-10].http://www.paper.edu.cn/releasepaper/content/200411-106.点此复制
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