活性组分掺杂对低温锰基催化剂脱硝性能的影响

发布时间：2018-06-10 05:27

  本文选题：工业废气处理 + 掺杂　； 参考：《材料导报》2017年14期

【摘要】：利用Ce和锰盐复配对单组分锰盐活性组分进行掺杂改性,并采用分步共混法制备一系列催化剂。催化剂活性测试显示锰盐复配及Ce的掺杂均能提高锰基催化剂低温活性,且锰盐复配形式的掺杂对催化剂低温活性提高更多。通过对比各催化剂强度状况发现活性组分的掺杂使催化剂的机械强度得到很大提高,而BET结果显示掺杂改性后的锰基催化剂其表面织构得到较大改善。催化剂的XRD结果表明500℃焙烧的锰基催化剂活性组分均以无定形态存在。通过对改性后的催化剂进行NH3-TPD和H2-TPR分析,发现相比于Ce对单组分锰盐的掺杂改性,锰盐复配形式的掺杂改性对催化剂表面酸量和氧化还原性能的提高更加显著。
[Abstract]:A series of catalysts were prepared by adding ce and manganese salt to modify the active components of single component manganese salt and to prepare a series of catalysts by means of step by step blending method. The results of activity test showed that the low temperature activity of mn based catalyst was improved by mn salt and ce doping, and the low temperature activity of mn 2 + was increased by doping mn 2 +. By comparing the strength of the catalysts, it was found that the mechanical strength of the catalysts was greatly improved by doping the active components, while the surface texture of the modified Mn-based catalysts was greatly improved by BET. XRD results showed that the active components of manganese based catalysts calcined at 500 鈩，

本文编号：2002125