| V_2O_5/WO_3/TiO_2催化剂制备及其SCR性能研究 |
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| 引用本文： | 吕刚,宋崇林,高文斌,龚彩荣,裴毅强.V_2O_5/WO_3/TiO_2催化剂制备及其SCR性能研究[J].工程热物理学报,2008,29(11). |
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| 作者姓名： | 吕刚 宋崇林 高文斌 龚彩荣 裴毅强 |
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| 作者单位： | 1. 天津大学内燃机燃烧学国家重点实验室,天津,300072
2. 天津大学材料科学与工程学院,天津,300072 |
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| 基金项目： | 国家自然科学基金
，
霍英东教育基金会高等院校青年教师基金
，
天津市应用基础及前沿技术研究计划重点项目
，
国家高技术研究发展计划(863计划)
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| 摘 要： | 本文通过浸渍法制备了V2O5/TiO2系列筛选催化剂及V2O5/WO3/TiO2负载型催化剂,并在模拟评价装置上考察了上述催化剂在SCR反应巾的催化性能.结果表明,V2O5在涂材料中应该低于3wt.%;钒系催化剂对NOx的净化效率随反应温度的升高,先增加而后减小,存在一个适宜反应温度窗口;随反应温度升高, NH3泄漏量逐渐降低,在温度达到350°C之后,NH3泄漏世不再随温度的升高而变化;SCR反应温度较低时HC和CO浓度基本不变,但从450°C开始,HC浓度逐渐降低,而CO浓度则急剧升高;随NOx/NH3比例增加,NOx转化效率逐渐降低.
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| 关 键 词： | V2O5/WO3/TiO2催化剂 柴油机 选择性催化还原(SCR) 氮氧化物(NOx)净化 |
PREPARATION OF V_2O_5/WO_3/TiO_2 CATALYST AND THE PROPERTIES FOR UREA-SELECTIVE CATALYTIC REDUCTION IN NO_x |
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| L Gang,SONG Chong-Lin,GAO Wen-Bin,GONG Cai-Rong,PEI Yi-Qiang.PREPARATION OF V_2O_5/WO_3/TiO_2 CATALYST AND THE PROPERTIES FOR UREA-SELECTIVE CATALYTIC REDUCTION IN NO_x[J].Journal of Engineering Thermophysics,2008,29(11). |
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| Authors: | L Gang SONG Chong-Lin GAO Wen-Bin GONG Cai-Rong PEI Yi-Qiang |
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| Institution: | LU Gang~1 SONG Chong-Lin~1 GAO Wen-Bin~1 GONG Cai-Rong~2 PEI Yi-Qiang~1 1. State Key Laboratory of Engines,Tianjin University,Tianjin 30072,China 2. School of Material Science , Engineering,China |
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| Abstract: | Titania-supported tungsten and vanadium oxides with different WO3 and V_2O_5 loadings have been prepared by the impregnation method. Their activity and performance in the selective catalytic reduction (SCR) in NO_x with NH_3 are also characterized by a simulated evaluating rig. The results show that the content of V_2O_5 should be less than 3 wt.% of the entire coating. The conversion efficiency of NO_x in SCR reaction is increased with the temperature until the critical temperature is reached, and then dec... |
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| Keywords: | V_2O_5/WO_3/TiO_2 catalyst diesel engine selective catalytic reduction (SCR) removal of NO_x |
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