A contrastive study of the introduction of cobalt as a modifier for active components and supports of catalysts for NH3-SCR
A contrastive study of the introduction of cobalt as a modifier for active components and supports of catalysts for NH3-SCR
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DOI：
10.1016/j.jiec.2012.12.028
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发表时间：
2013-07
影响因子：
6.1
通讯作者：
Xiaopeng Zhang;B. Shen;Kai Wang;Jianhong Chen
中科院分区：
文献类型：
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作者：
Xiaopeng Zhang;B. Shen;Kai Wang;Jianhong Chen
将Mn/Ce-ZrO X、Mn-Co/Ce-ZrO X和Mn/Co-Ce-ZrO X三种催化剂用于低温NH3-SCR脱硝反应，采用XRD、TPR和XPS等手段对催化剂的物化性能进行表征。结果表明，Mn/Co-Ce-ZrO X复合材料具有较高的锰氧化物分散度、较好的氧化还原性能、较多的表面酸中心、较多的表面吸附氧物种和Mn ~（4+）离子。这些因素使得Mn/Co-Ce-ZrO_x具有较好的低温活性，在180°C时活性可达99.0%。Mn/Co-Ce-ZrOX的抗SO2和H2O性能最好，这主要是因为Co的引入抑制了Mn/Co-Ce-ZrOX表面硫酸盐和羟基的形成。
Three catalysts Mn/Ce–ZrOX, Mn–Co/Ce–ZrOXand Mn/Co–Ce–ZrOXwere used for low-temperature NH3-SCR of NO. XRD, TPR and XPS were performed to characterize the physicochemical property of the catalysts. Experimental results showed that Mn/Co–Ce–ZrOXhad a higher dispersion of manganese oxides, a better redox property, more surface acid sites and more surface adsorbed oxygen species and Mn4+ion. These facts caused a better low-temperature activity for Mn/Co–Ce–ZrOXwhich was 99.0% at 180°C. Furthermore, Mn/Co–Ce–ZrOXshowed the best resistance to SO2and H2O which mainly because the introduction of cobalt inhibited the formation of sulfate salts and hydroxyls on the surface of Mn/Co–Ce–ZrOX.