Silica and silica-titania intercalated MCM-36 modified with iron as catalysts for selective reduction of nitrogen oxides - the role of associated reactions

Jankowska Aleksandra; Kowalczyk Andrzej; Rutkowska MalgorzataMozgawa WlodzimierzGil BarbaraChmielarz Lucjan

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Silica and silica-titania intercalated MCM-36 modified with iron as catalysts for selective reduction of nitrogen oxides - the role of associated reactions

机译：硅和泥化夹层MCM-36 silica-titania修改与铁作为选择性的催化剂减少氮氧化物的作用相关的反应

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The MCM-22 zeolite and its silica and silica-titania intercalated forms, MCM-36 and xTi-MCM-36, were synthesized and then modified with iron by the ion-exchange method. The zeolitic samples were characterized with respect to their chemical composition (ICP-OES), structure (XRD, FTIR, RS, UV-vis DRS), texture (N-2-sorption), surface acidity (NH3-TPD) and reducibility (H-2-TPR). Fe-Modified zeolites were found to be active and selective catalysts for the NH3-SCR process, effectively operating to about 475 degrees C. The activity of the studied catalysts increased with an increase in titanium content in the interlayer pillars of MCM-36. Apart from the NH3-SCR process, other associated reactions - NO to NO2 oxidation, ammonia oxidation and N2O decomposition - that may influence the overall efficiency of nitrogen oxide reduction were also analysed and discussed.

机译：MCM-22沸石和硅silica-titania夹层的形式,MCM-36和xTi-MCM-36合成,然后修改与铁离子交换的方法。沸石的样本特征的尊重他们的化学成分(ICP-OES),结构(RS XRD、红外光谱,紫外可见DRS),纹理(N-2-sorption)、表面酸性(NH3-TPD)和还原性(H-2-TPR)。发现活性和选择性的催化剂NH3-SCR过程,有效地操作475度c的活动进行了研究增加而增加钛催化剂MCM-36层间柱的内容。除了NH3-SCR过程,其他相关联的对NO2氧化反应——不,氨氧化和一氧化二氮分解——这可能影响氮的整体效率氧化还原也进行了分析和讨论。

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来源
《Catalysis science & technology》 |2020年第23期|7940-7954|共15页
作者
Jankowska Aleksandra; Kowalczyk Andrzej; Rutkowska MalgorzataMozgawa WlodzimierzGil BarbaraChmielarz Lucjan;
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Jagiellonian Univ, Fac Chem, Gronostajowa 2, PL-30387 Krakow, Poland;

AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Mickiewicza 30, PL-30050 Krakow, Poland;

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正文语种英语
中图分类汉语教学;
关键词
Iron; Zeolites; nitrogen oxidesCatalystsREACTIONModifiedTi content;

机译：铁;沸石;氮oxidesCatalystsREACTIONModifiedTi内容;

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Silica and silica-titania intercalated MCM-36 modified with iron as catalysts for selective reduction of nitrogen oxides - the role of associated reactions

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