The promotion effect of Sb on the Na resistance of Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3
The promotion effect of Sb on the Na resistance of Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3
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DOI：
10.1016/j.fuel.2015.12.009
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发表时间：
2016-04
期刊：
影响因子：
7.4
通讯作者：
Ning-zhi Yang;R. Guo;W. Pan;Qi-lin Chen;Qing-shan Wang;Chen-zi Lu
中科院分区：
文献类型：
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作者：
Ning-zhi Yang;R. Guo;W. Pan;Qi-lin Chen;Qing-shan Wang;Chen-zi Lu
Na对NH3选择性催化还原NO的Mn/TiO2催化剂有严重的失活作用。本研究发现Sb对MnOx/TiO2催化剂的耐Na性能有促进作用。然后根据BET、XRD、H2-TPR、NH3-TPD、XPS和原位DRIFT的表征结果研究了其促进机理。 H2-TPR和NH3-TPD结果表明，在MnOx/TiO2上添加Sb分别可以增强氧化还原能力和表面酸性，DRIFT结果表明，在MnOx/TiO2上添加Sb可以在催化剂表面产生强Lewis酸位，用于NH3吸附。因此，Sb的掺杂对Mn/TiO2催化剂的耐Na性能有促进作用。
Na has a serious deactivation effect on Mn/TiO2catalyst for selective catalytic reduction of NO with NH3. In this study, it was found that Sb had a promotion effect on the Na resistance of MnOx/TiO2catalyst. Then the promotion mechanism was investigated based on the characterization results of BET, XRD, H2-TPR, NH3-TPD, XPS andin situDRIFT. The results of H2-TPR and NH3-TPD showed that the addition of Sb on MnOx/TiO2could enhance the redox ability and surface acidity respectively, and the results of DRIFT indicated that the addition of Sb on MnOx/TiO2could generate strong Lewis acid sites on the catalyst surface for NH3adsorption. Therefore, the doping of Sb has a promotion effect on the Na resistance of Mn/TiO2catalyst.