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OALib Journal期刊
ISSN: 2333-9721
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cu、mn、ce改性v2o5-wo3/tio2/堇青石催化剂urea-scr脱除no
, PP. 608-614
Keywords: urea-scr,氮氧化物,v2o5-wo3/tio2,整体催化剂
Abstract:
？采用硅胶为黏结剂,在堇青石蜂窝陶瓷上以涂覆法依次负载cu、mn、ce改性的纳米tio2粉末、w改性的v2o5粉末得到复合催化剂,在120～550℃用尿素选择性催化还原(urea-scr)氮氧化物时显示良好活性。与商业催化剂v2o5-wo3/tio2相比,添加cu、mn、ce后,催化剂脱硝活性显著提高,活性温度窗口明显拓宽。结果表明,催化剂的高活性与催化剂表面适度的酸碱性、高比值的v4+/v5+以及良好的氧化还原性能和锐钛矿相的tio2、丰富的表面裂纹的存在等因素有关。
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