| Cu、Mn、Ce改性V2O5-WO3/TiO2/堇青石催化剂Urea-SCR脱除NO |
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| 引用本文： | 董国君,罗璇,杨治,梁涛,张文平.Cu、Mn、Ce改性V2O5-WO3/TiO2/堇青石催化剂Urea-SCR脱除NO[J].燃料化学学报,2012,40(5):608-614. |
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| 作者姓名： | 董国君 罗璇 杨治 梁涛 张文平 |
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| 作者单位： | 1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;2. College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China |
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| 基金项目： | 黑龙江省博士后基金(LRB07-233) |
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| 摘 要： | 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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| 关 键 词： | Urea-SCR 氮氧化物 V2O5-WO3/TiO2 整体催化剂 |
| 收稿时间： | 2011-06-13 |
Urea-SCR of NO over V2O5-WO3/TiO2/cordierite catalyst modified with Cu,Mn,Ce |
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| DONG Guo-jun,LUO Xuan,YANG Zhi,LIANG Tao,ZHANG Wen-ping.Urea-SCR of NO over V2O5-WO3/TiO2/cordierite catalyst modified with Cu,Mn,Ce[J].Journal of Fuel Chemistry and Technology,2012,40(5):608-614. |
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| Authors: | DONG Guo-jun LUO Xuan YANG Zhi LIANG Tao ZHANG Wen-ping |
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| Institution: | 1.College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China; 2.College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | The cordierite honeycomb ceramics(CC) was coated with Mn,Cu,Ce modified TiO2,and W modified V2O5 in sequence by coating method.A series of monolith catalysts were evaluated at 120~550℃ for the selective catalytic reduction(SCR) of NO by urea.Compared to commercial catalyst V2O5-WO3/TiO2,the SCR performance was significantly improved between a wide temperature with the introduction of Mn,Cu,Ce.The results of characterization suggested that the activity improvement may be contributed to the suitable acidity and basicity of catalyst surface,the high ratio of V4+/V5+,the existence of anatase phase TiO2 and the good redox capability of complex catalyst.This study provides a potential catalyst system for the removal of NOx from diesel engines. |
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| Keywords: | Urea-SCR nitrogen oxides V2O5-WO3/TiO2 monolithic catalyst |
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