| 纳米负载型V_2O_5-WO_3/TiO_2催化剂碱中毒及再生研究 |
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| 引用本文： | 沈伯雄,熊丽仙,刘亭,王静,田晓娟. 纳米负载型V_2O_5-WO_3/TiO_2催化剂碱中毒及再生研究[J]. 燃料化学学报, 2010, 38(1) |
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| 作者姓名： | 沈伯雄 熊丽仙 刘亭 王静 田晓娟 |
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| 作者单位： | 南开大学,环境科学与工程学院,天津,300071 |
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| 基金项目： | 国家自然科学基金，新世纪优秀人才计划，天津科技支撑计划 |
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| 摘 要： | 实验制备了陶瓷颗粒为骨架的纳米级V2O5-WO3/TiO2(C)催化剂。采用浸渍法模拟碱金属中毒,研究了中毒及再生对催化剂脱硝活性的影响,运用XRD、FT-IR、H2-TPR、XPS技术表征分析了碱金属对催化剂的失活作用。实验表明,碱金属能使催化剂活性降低,钾的毒性大于钠。FT-IR结果显示,催化剂以Lewis酸作为活性酸位。H2-TPR、XPS结果表明,钾的加入降低了催化剂的氧化能力,主要影响了催化剂表面的吸附氧。采用单纯的水洗方法并不能提高催化剂活性,而酸洗再生后催化剂在较高反应温度下活性得到较好的恢复。
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| 关 键 词： | 选择性催化还原 脱硝 碱金属 催化剂中毒 再生 |
Alkali deactivation and regeneration of nano V_2O_5-WO_3/TiO_2 catalysts |
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| SHEN Bo-xiong,XIONG Li-xian,LIU Ting,WANG Jing,TIAN Xiao-juan. Alkali deactivation and regeneration of nano V_2O_5-WO_3/TiO_2 catalysts[J]. Journal of Fuel Chemistry and Technology, 2010, 38(1) |
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| Authors: | SHEN Bo-xiong XIONG Li-xian LIU Ting WANG Jing TIAN Xiao-juan |
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| Affiliation: | SHEN Bo-xiong,XIONG Li-xian,LIU Ting,WANG Jing,TIAN Xiao-juan(College of Environmental Science , Engineering,Nankai University,Tianjin 300071,China) |
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| Abstract: | The nano TiO2/ceramic supported V2O5-WO3 catalysts(V2O5-WO3/TiO2(C)) were prepared.Their poisoning by alkali metal(K,Na) impregnated and regeneration were investigated.The catalysts were characterized by XRD,FT-IR,H2-TPR,XPS measurements.The results indicated that the catalytic activity is decreased by adding alkali metals;potassium is more poisonous than sodium.FT-IR results suggested that Lewis acid sites in the catalysts are active in the de-NOx reaction.H2-TPR and XPS analysis revealed that potassium le... |
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| Keywords: | V_2O_5-WO_3/TiO_2 selective catalytic reduction V_2O_5-WO_3/TiO_2 de-Nox alkali catalyst poisoning regeneration |
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