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商业SCR烟气脱硝催化剂钙中毒研究

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商雪松, 陈进生, 姚源, 胡恭任. 商业SCR烟气脱硝催化剂钙中毒研究[J]. 环境工程学报, 2013, 7(2): 624-630.
引用本文: 商雪松, 陈进生, 姚源, 胡恭任. 商业SCR烟气脱硝催化剂钙中毒研究[J]. 环境工程学报, 2013, 7(2): 624-630.
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Shang Xuesong, Chen Jinsheng, Yao Yuan, Hu Gongren. Study on calcium poisoning of commercial SCR de-NOx catalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 624-630.
Citation: Shang Xuesong, Chen Jinsheng, Yao Yuan, Hu Gongren. Study on calcium poisoning of commercial SCR de-NOx catalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 624-630.
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商业SCR烟气脱硝催化剂钙中毒研究

  • 1.

    华侨大学化工学院,厦门 361021

  • 2.

    中国科学院城市环境研究所,厦门 361021

  • 基金项目:

    国家科技支撑计划项目(2008BAC32B03)

    福建省面上基金项目(2011J01060)

  • 中图分类号: X51

Study on calcium poisoning of commercial SCR de-NOx catalyst

  • 1.

    School of Chemical Engineering, Huaqiao University, Xiamen 361021, China

  • 2.

    Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

  • Fund Project:

  • 摘要: 使用2种不同浓度的前驱体溶液(Ca(NO3)2和Ca(CH3COO)2溶液)浸渍新鲜商业SCR(selective catalytic reduction)烟气脱硝催化剂,并对浸渍中毒后催化剂的性能进行了研究。实验结果表明,物理中毒在本研究中占主导位置,化学中毒并不明显。采用离子色谱、氮气吸附-脱附分析、红外光谱分析、X射线衍射分析、扫面电镜分析等多种表征技术对中毒后催化剂进行了表征。结果表明,中毒后催化剂孔结构性质发生了变化,特别是Ca(CH3COO)2溶液浸渍催化剂,内部孔道堵塞较为严重。X射线衍射分析和扫描电镜分析也从另一方面说明了CaCO3的出现及积累导致催化剂脱硝效率降低。此外,催化剂红外光谱分析从表面活性位的角度说明了本研究催化剂化学中毒现象并不明显。
    Abstract: Two precursor solutions (Ca(NO3)2 and Ca(CH3COO)2) with different concentrations were used to impregnate the fresh commercial SCR (selective catalytic reduction) de-NOx catalysts. And, then, poisoning catalysts were evaluated. The result shows that physical aspect being regarded as the main factor leads to the catalyst poisoning. And the chemical poisoning doesn’t play a critical role in this study. Moreover, the techniques of IC, BET, FT-IR, XRD and SEM were used to characterize these objectives. The results indicate that the pore properties of catalysts are changed after poisoning treatment. Especially, for the catalyst impregnated by Ca(CH3COO)2, the pore inside poisoning catalyst are blocked more seriously. And the data obtained from XRD and SEM shows, in another aspect, that the appearance and deposition of CaCO3 cause the decrease of NO conversion. Moreover, analysis of FT-IR supports the analysis of the activity of poisoning catalysts in the sign of active site on the surface of the catalyst.
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  • [1] Busca G., Lietti L., Ramis G. Chemical and mechanistic aspects of the selective catalysts reduction of NOx by ammonia over oxide catalysts: A review. Applied Catalysis B: Environmental, 1998,18(13):1-36
    [2] 陈进生. 燃煤电厂烟气脱硝技术—选择性催化还原法. 北京: 中国电力出版社, 2008.36-38
    [3] 黄建军, 路达, 赵毅. 氮氧化物催化还原技术在火电厂的应用研究. 电力情报, 2002,(3):27-29 Huang Jianjun, Lu Da, Zhao Yi. Application of catalyzed reduction technology for De-NOx in power plants. Information on Electric Power, 202,(3):27-29(in Chinese)
    [4] 李晓东, 杨卓如. 国外氮氧化物气体治理的研究进展. 环境工程, 1996,14(6):34-39 Li Xiaodong, Yang Zhuoru. Research progress of controlling and eliminating nitric oxide air pollution from abroad. Environmental Engineering, 1996,14(6):34-39(in Chinese)
    [5] 严艳丽, 魏玺群. NOx的脱除及回收技术. 低温与特气, 2000,18(4):24-30 Yan Yanli, Wei Xiqun. NOx removal and recovery technology. Low Temperature and Specialty Gases, 2000,18(4):24-30(in Chinese)
    [6] Bartholomew C. H. Mechanisms of catalyst deactivation. Applied Catalysis A: General, 2001,212(1/2):17-60
    [7] Chen J. P., Buzanowski M. A., Yang R. T. Deactivation of the vanadia catalyst in the selective catalytic reduction process. Journal of the Air & Waste Management Association, 1990,40(10):1403-1409
    [8] Scot P., Shozo K., Norihisa K., et al. Optimizing SCR catalyst design and performance for coal-fired boilers. EPA/EPRI 1995 Joint Symposium Stationary Combustion NOx Control.1995
    [9] Nicosia D., Czekaj I., Krocher O. Chemical deactivation of V2O5-WO3/TiO2 SCR catalysts by additives and impurities from fuels, lubrication oils and urea solution(Part II): Characterization study of the effect of alkali and alkaline earth metals. Applied Catalysis B: Environmental, 2008,77(15):228-236
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    [11] 张秋林. CaO对SCR催化剂选择的影响. 洁净煤燃烧与发电技术, 2006,6(7):29-30 Zhang Qiulin. Effect on the choice of SCR catalyst by CaO. Clean Coal Combustion and Power Generation Technology, 2006,6(7):29-30(in Chinese)
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出版历程
  • 收稿日期:  2011-10-10
  • 刊出日期:  2013-02-02

商业SCR烟气脱硝催化剂钙中毒研究

  • 1.  华侨大学化工学院,厦门 361021
  • 2.  中国科学院城市环境研究所,厦门 361021
  • 收稿日期:  2011-10-10
基金项目:

国家科技支撑计划项目(2008BAC32B03)

福建省面上基金项目(2011J01060)

摘要: 使用2种不同浓度的前驱体溶液(Ca(NO3)2和Ca(CH3COO)2溶液)浸渍新鲜商业SCR(selective catalytic reduction)烟气脱硝催化剂,并对浸渍中毒后催化剂的性能进行了研究。实验结果表明,物理中毒在本研究中占主导位置,化学中毒并不明显。采用离子色谱、氮气吸附-脱附分析、红外光谱分析、X射线衍射分析、扫面电镜分析等多种表征技术对中毒后催化剂进行了表征。结果表明,中毒后催化剂孔结构性质发生了变化,特别是Ca(CH3COO)2溶液浸渍催化剂,内部孔道堵塞较为严重。X射线衍射分析和扫描电镜分析也从另一方面说明了CaCO3的出现及积累导致催化剂脱硝效率降低。此外,催化剂红外光谱分析从表面活性位的角度说明了本研究催化剂化学中毒现象并不明显。

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