| Fe-V/TiO_2催化剂NH_3选择性催化还原柴油车尾气NO_x |
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| 引用本文： | 黄海凤,陈一杰,杨睿,朱秋莲,卢晗锋.Fe-V/TiO_2催化剂NH_3选择性催化还原柴油车尾气NO_x[J].燃料化学学报,2014,42(6):751-757. |
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| 作者姓名： | 黄海凤 陈一杰 杨睿 朱秋莲 卢晗锋 |
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| 作者单位： | 1. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
2. Institute of Catalytic Reaction Engineering, Zhejiang University of Technology, Hangzhou 310014, China |
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| 基金项目： | 国家自然科学基金(21107096);浙江省重大科技专项(2007C13042) |
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| 摘 要： | 采用浸渍法制备了一系列不同Fe/V比例的Fe-V/TiO2催化剂,考察了催化剂在模拟柴油车尾气中催化还原NOx的催化性能,采用TG、XRD、H2-TPR、NH3-TPD和Raman光谱对催化剂进行了表征。结果表明,当Fe引入后,能显著降低V2O5在高温下的挥发,减轻了钒系催化剂在移动源的生物毒性危害。其中,Fe/V比为1∶1(Fe1-V1/TiO2)的催化剂形成了FeVO4活性中心,表现出最好的催化活性,在220~420℃NOx转化率可达到90%以上。此外,Fe1-V1/TiO2催化剂高温热稳定性较好,并且具有较强的抗硫性能。
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| 关 键 词： | 柴油车尾气 SCR Fe-V/TiO2催化剂 抗硫性 |
| 收稿时间： | 2013-11-14 |
Fe-V/TiO2 catalysts for selective catalytic reduction of NOx with NH3 in diesel exhaust |
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| HUANG Hai-feng,CHEN Yi-jie,YANG Rui,ZHU Qiu-lian,LU Han-feng.Fe-V/TiO2 catalysts for selective catalytic reduction of NOx with NH3 in diesel exhaust[J].Journal of Fuel Chemistry and Technology,2014,42(6):751-757. |
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| Authors: | HUANG Hai-feng CHEN Yi-jie YANG Rui ZHU Qiu-lian LU Han-feng |
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| Abstract: | Fe-V/TiO2 catalysts with different Fe/V molar ratio were prepared by impregnation method. The catalytic activity of selective catalytic reaction (SCR) were evaluated at the simulation of diesel exhaust environment. The samples were characterized by thermogravimetric analysis, X-ray diffraction, H2 temperature programmed reduction, NH3 temperature-programmed desorption and Raman spectra. It was found that the addition of Fe could obviously decrease the losing of V2O5 at high temperature, which greatly decreased the toxicity of the vanadium-based catalysts in mobile sources. Among the synthesized catalysts, the Fe1-V1/TiO2 showed the highest activity with the NOx conversion efficiency over 90% between 220 ℃ and 420 ℃ due to formation of FeVO4 active sites. Moreover, Fe1-V1/TiO2 exhibited excellent thermal stability at high temperature and sulfur resistance. |
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| Keywords: | diesel exhaust SCR Fe-V/TiO2 catalysts sulfur resistance |
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