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首页> 外文期刊>Journal of Environmental Sciences >Effect of Mo contents on properties of Mo/ZSM-5 zeolite catalyst for NOx reduction
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Effect of Mo contents on properties of Mo/ZSM-5 zeolite catalyst for NOx reduction

机译：Mo含量对Mo / ZSM-5沸石催化剂还原NOx性能的影响

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摘要

Mo/ZSM-5 catalysts with different Mo content were prepared by impregnation method. The effect of Mo content on the property of Mo/ZSM-5 catalysts and their performance for selective catalytic reduction(SCR) of NO with ammonia was investigated by XRD, ICP, XPS and NO-TPD respectively. The results showed that the catalytic activity of Mo/ZSM-5 for SCR of NO is strongly influenced by the Mo loading in HZSM-5 zeolites. The NOx conversion reached the highest value of 64.2 percent at 315 deg C when Mo content is about 10.9 percent, and the temperatures at which the maximum of NOx conversion obtained were declined with the increase of Mo content. From XRD results, it can be seen that it exhibits the distinct interaction between Mo and HZSM-5 when Mo content is about 10.9 percent. This may result in a suitable phase structure in Mo/ZSM-5 catalyst, which is advantageous for NO reduction. XPS and NO-TPD results also showed that the catalytic activity of Mo/ZSM-5 may be related to the Mo percent on the surface.
机译：采用浸渍法制备了不同Mo含量的Mo / ZSM-5催化剂。分别通过XRD，ICP，XPS和NO-TPD研究了Mo含量对Mo / ZSM-5催化剂性能及其对氨选择性催化还原NO性能的影响。结果表明，Mo / ZSM-5对NO SCR的催化活性受到HZSM-5沸石中Mo含量的强烈影响。当Mo含量为约10.9％时，NOx转化率在315℃达到64.2％的最高值，并且随着Mo含量的增加，获得的最大NOx转化率的温度降低。从XRD结果可以看出，当Mo含量约为10.9％时，Mo和HZSM-5之间表现出明显的相互作用。这可以在Mo / ZSM-5催化剂中产生合适的相结构，这对于NO的还原是有利的。 XPS和NO-TPD结果还表明，Mo / ZSM-5的催化活性可能与表面的Mo百分比有关。

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