Selective catalytic reduction of NO by alcohols on Co- and Fe-Siβ catalysts
Selective catalytic reduction of NO by alcohols on Co- and Fe-Siβ catalysts
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DOI：
10.1016/j.cattod.2006.08.055
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发表时间：
2007-01
期刊：
影响因子：
5.3
通讯作者：
S. Dzwigaj;J. Janas;T. Machej;M. Che
中科院分区：
文献类型：
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作者：
S. Dzwigaj;J. Janas;T. Machej;M. Che
采用EPR、漫反射UV-vis、XRD和n2物理吸附等手段对制备的Co-Siβ和Fe-Siβ催化剂进行了表征。铁和钴离子以孤立的晶格四面体形式存在，金属含量低（0.7和0.9wt）。分别为%)。对于高铁含量，出现feo低聚物。分离的coii和feiii种沸石具有乙醇选择性催化还原NO的活性。在feo低聚物上，当温度高于700K时，乙醇对NO的选择性催化还原开始以NO氧化为no2为主。
Co–Siβ and Fe–Siβ catalysts prepared by a two-step post-synthesis method were characterised by EPR, diffuse reflectance UV–vis, XRD and N2-physisorption. Iron and cobalt ions are present as isolated lattice tetrahedral CoIIand FeIIIspecies for low metal contents (0.7 and 0.9wt.%, respectively). For higher iron content, FeOxoligomers appear. Zeolites with isolated CoIIand FeIIIspecies are active in selective catalytic reduction of NO with ethanol. On FeOxoligomers the oxidation of NO to NO2starts to dominate in the selective catalytic reduction of NO with ethanol at the temperatures higher than 700K.