Poisoning effect of CaO on Cu/ZSM-5 for the selective catalytic reduction of NO with NH3
Poisoning effect of CaO on Cu/ZSM-5 for the selective catalytic reduction of NO with NH3
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DOI：
10.1016/j.catcom.2018.04.020
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发表时间：
2018-07-05
影响因子：
3.7
通讯作者：
Mao, Dongsen
中科院分区：
文献类型：
--
作者：
Xue, Hongyan;Guo, Xiaoming;Mao, Dongsen
考察了CaO对Cu/ZSM-5催化剂上NH3选择性催化还原NO反应的影响。采用等湿浸渍法制备了一系列不同钙含量的试样。采用N2吸附/脱附、粉末XRD、H2-TPR、NH3-TPD和XPS等技术对催化剂进行了表征。Ca负载导致CuO还原能力下降、表面酸中心损失和表面Cu浓度降低，这些都是导致Ca浸渍Cu/ZSM-5催化剂失活的原因。
The influence of the presence of CaO in the Cu/ZSM-5 catalyst on the selective catalytic reduction of NO by NH3 was investigated. A series of samples containing different amounts of Ca loading have been prepared by the incipient wetness impregnation method. The catalysts were characterized using N-2 adsorption/desorption, powder XRD, H-2-TPR, NH3-TPD and XPS techniques. The Ca loading led to a decrease in the ability for reduction of CuO, a loss of the surface acid sites and a decrease in the surface concentration of Cu, which all appear responsible for the deactivation of Ca-impregnated Cu/ZSM-5 catalysts.