| 纳米SCR催化剂Ce-V/TiO_2的制备与研究 |
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| 引用本文： | 任秀峰,王芬,李强,朱建锋.纳米SCR催化剂Ce-V/TiO_2的制备与研究[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 任秀峰 王芬 李强 朱建锋 |
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| 作者单位： | 陕西科技大学,陕西,西安,710021 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用溶胶-凝胶法和浸渍法制备选择性催化还原(SCR)脱硝反应复合纳米催化剂Ce-V/TiO_2,在不同的实验条件下制备出一系列的TiO_2凝胶用作催化剂载体.然后通过浸渍法依次负载CeO_2和V_2O_5于多孔TiO_2载体.用氨气作为还原性气体,对选择性催化还原NOx进行实验研究.在不同的TiO_2载体煅烧温度、CeO_2和V_2O_5负载量以及催化还原反应温度等条件下,对催化剂的表面结构和催化性能采用BET、XRD、SEM等手段进行表征分析.结果表明,纳米Ce-V/TiO_2固溶体复合催化剂以及对其制备工艺技术参数的优化可增大催化剂的比表面积和微孔体积,使催化剂的催化活性有很大的提高.此外,相当数量的多孔纳米TiO_2大大增加了光催化活性的有效面积,有利于增大与反应物的接触面积和提高光催化活性.当载体TiO_2 的煅烧温度和催化还原反应温度为500 ℃时,5%Ce-10%V/TiO_2催化剂反应的NO_x转化率可达96.2%.
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| 关 键 词： | 催化剂 制备 溶胶-凝胶 |
Preparation and Investigation of Nano-Ce-V/TiO_2 Catalysts |
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| Ren Xiufeng,Wang Fen,Li Qiang,Zhu Jianfeng.Preparation and Investigation of Nano-Ce-V/TiO_2 Catalysts[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Ren Xiufeng Wang Fen Li Qiang Zhu Jianfeng |
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| Affiliation: | Ren Xiufeng,Wang Fen,Li Qiang,Zhu Jianfeng (Shaanxi University of Science & Technology,Xi'an 710021,China) |
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| Abstract: | The nano-Ce-V/TiO2 catalysts with the selective catalytic reduction (SCR) were prepared by sol-gel and insuccation method. The phase compositions,microstructures and specific surface area of the catalysts were analyzed by XRD,SEM and BET,respectively. The effects of nano-TiO2 Calcination temperature,CeO2 and V2O5 loading and reaction temperature on the catalytic performances of the as-prepared catalysts were investigated by the selective reduction of NOx with NH3. The results showed all the as-prepared Ce-V... |
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| Keywords: | SCR NO_x Ce-V/TiO_2 catalysts investigation sol-gel SCR NO_x |
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