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化工进展  2015 

烟气脱硝催化剂中毒机制与再生技术

DOI: 10.16085/j.issn.1000-6613.2015.12.001, PP. 4129-4138

Keywords: 烟气脱硝,选择性催化还原,催化剂,中毒,再生

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Abstract:

随着烟气脱硝系统在火电厂的应用,对选择性催化还原催化剂的中毒机理和再生工艺的研究受到广泛关注。本文系统综述了脱硝催化剂的物理及化学中毒机制、再生方法及工艺。在中毒机制方面,将不同中毒机制归为三类颗粒物或生成盐沉积在催化剂表面,堵塞催化剂通道和孔道;毒物与活性中心作用使表面的酸性性能和氧化还原性能降低;催化剂结构破坏和发生不可逆相变。在催化剂的再生方面,本文详细介绍了失活催化剂的再生工艺流程和再生液的选择,比较了不同再生技术的针对性和优缺点,最后介绍了电厂高钙项目的再生工业示范,其再生催化剂的相对活性恢复到原来的0.96,SO2氧化率为1.0%,且各项指标达到了新鲜催化剂的水平。本文对延长催化剂使用寿命和制定废弃催化剂再生工艺具有重要指导意义。

References

[1]  胡将军,李丽. 燃煤电厂烟气脱硝催化剂[M]. 北京:中国电力出版社,2014.
[2]  Kr?cher O,Elsener M. Chemical deactivation of V2O5/WO3-TiO2 SCR catalysts by additives and impurities from fuels,lubrication oils,and urea solution I. Catalytic studies[J]. Applied Catalysis B:Environmental,2008,77:215-227.
[3]  Chen L,Li J,Ge M. The poisoning effect of alkali metals doping over nano V2O5-WO3/TiO2 catalysts on selective catalytic reduction of NOx by NH3[J]. Chemical Engineering Journal,2011,170:531-537.
[4]  Nicosia D,Czekaj I,Kr?cher 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[J]. Applied Catalysis B:Environmental,2008,77:228-236.
[5]  Lisi L,Lasorella G,Malloggi S,et al. Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts[J]. Applied Catalysis B:Environmental,2004,50:251-258.
[6]  Tang F,Xu B,Shi H,et al. The poisoning effect of Na+ and Ca 2+ ions doped on the V2O5/TiO2 catalysts for selective catalytic reduction of NO by NH3[J]. Applied Catalysis B:Environmental,2010,94:71-76.
[7]  孙克勤,钟秦. SCR催化剂的碱金属中毒研究[J]. 中国环保产业,2007,7:30-32.
[8]  Peng Y,Li J H,Shi W. Design strategies for development of SCR catalyst:Improvement of alkali poisoning resistance and novel regeneration method[J]. Environmental Science & Technology,2012,46:12623-12629.
[9]  中国环境科学学会. 中国环境科学学会2006年学术年会优秀论文集[C]. 北京:中国环境科学出版社,2006.
[10]  Benson S A,Laumb J D,Crocker C R,et al. SCR catalyst performance in flue gases derived from subbituminous and lignite coals[J]. Fuel Process Technol.,2005,86:577-613.
[11]  Pritchard S,Kaneko S,Suyama K,et al. Optimizing SCR catalyst design and performance for coal-fired boilers[C]//EPA/EPRI 1995 Joint Symposium Stationary Combustion NOx Control,May 16-19,1995.
[12]  刘显彬,刘伟,黄锐,等. 燃煤电站SCR催化剂中毒原理及再生技术[C]//北京:中国环境科学学会学术年会,2011.
[13]  Li J,Chang H,Ma L. Low-temperature selective catalytic reduction of NOx with NH3 over metal oxide and zeolite catalysts—A review[J]. Catalysis Today,2011,175(1):147-156.
[14]  Chang H,Chen X,Li J. Improvement of activity and SO2 tolerance of Sn-modified MnOx-CeO2 catalysts for NH3-SCR at low temperatures[J]. Environmental Science & Technology,2013,47(10):5294-5301.
[15]  Yan N Q,Chen W M,Chen J,et al. Significance of RuO2 modified SCR catalyst for elemental mercury oxidation in coal-fired flue gas[J]. Environmental Science & Technology,2011,45(13):5725-5730.
[16]  Li H L,Wu C Y,Li Y,et al. CeO2-TiO2 catalysts for catalytic oxidation of elemental mercury in low-rank coal combustion flue gas[J]. Environmental Science & Technology,2011,45(17):7394-7400.
[17]  Choung J W,Nam I S. Characteristics of copper ion exchanged mordenite catalyst deactivated by HCl for the reduction of NOx with NH3[J]. Applied Catalysis B-Environmental,2006,64(1/2):42-50.
[18]  Chang H Z,Li J H,Su W. A novel mechanism for poisoning of metal oxide SCR catalysts:Base-acid explanation correlated with redox properties[J]. Chemical Communications,2014,50:10031-10034.
[19]  郑刘根,刘桂建. 中国煤中砷的含量分布、赋存状态、富集及环境意义[J]. 地球学报,2006,27(4):355-366.
[20]  孙克勤,钟秦,于爱华. SCR催化剂的As中毒的研究[J]. 中国环保产业,2008,1:40-41.
[21]  Carlsson K. Heavy metals from “energy from waste” plants-comparsion of gas cleaning systems[J]. Waste Management & Research,1986,4:15-20.
[22]  Khodayari R,Odenbrand C. Deactivating effects of lead on the selective catalytic reduction of nitric oxide with ammonia over a V2O5/WO3/TiO2 catalyst for waste incineration applications[J]. Industrial and Engineering Chemistry Research,1998,37:1196-1202.
[23]  Chen J,Yang R. Mechanism of poisoning of the V2O5/ TiO2 catalyst for the reduction of NO by NH3[J]. J. Catal.,1990,125:411-420.
[24]  Jiang Y,Gao X,Zhang Y,et al. Effects of PbCl2 on selective catalytic reduction of NO with NH3 over vanadia-based catalysts[J]. Journal of Hazardous Materials,2014,274:270-278.
[25]  Beck J,Muller R,Brandenstein R. The behaviour of phosphorus in flue gases from coal and secondary fuel co-combustion[J]. Fuel,2005,84(14-15):1911-1919.
[26]  Beck J,Unterberger E. The behaviour of phosphorus in the flue gas during the combustion of high-phosphate fuels[J]. Fuel,2006,85(10-11):1541-1549.
[27]  Beck J,Brandenstein J,Unterberger S. Effects of sewage sludge and meat and bone meal co-combustion on SCR catalysts[J]. Applied Catalysis B-Environmental,2004,49(1):15-25.
[28]  Nicosia D,Elsener M,Krocher O. Basic investigation of the chemical deactivation of V2O5/WO3-TiO2 SCR catalysts by potassium,calcium,and phosphate[J]. Topics in Catalysis,2007,42-43(1-4):333-336.
[29]  Kamata H,Takahashi K,Odenbrand C. Surface acid property and its relation to SCR activity of phosphorus added to commercial V2O5(WO3)/TiO2 catalyst[J]. Catalysis Letters,1998,53(1-2):65-71.
[30]  曾瑞. 浅谈SCR废催化剂的回收再利用[J]. 中国环保产业,2012,11:348-350.
[31]  James E,Tony E,William H. The impact of arsenic on coal fired power plants equipped with SCR[C]//ICAC 2002 Forum,Operating Experience for Reducing NOx Emissions,2002.
[32]  张立,陈崇明,王平. SCR脱硝催化剂的再生与回收[J]. 电站辅机,2012,33(3):27-30.
[33]  Raziyeh Khodayari,Ingemar Odenbrand C U. Regeneration of commercial TiO2-V2O5-WO3 SCR catalysts used in bio fuel plants[J]. Applied Catalysis B-Environmental,2001,30(1-2):87-99.
[34]  Lee Jung Bin,Lee Tae Wo,Song Kwang Chul,et al. Method of regenerating honeycomb type SCR catalyst by air lift loop reactor:US,11/262159[P]. 2009-09-22.
[35]  Nojima Shigeru,Iida Kozo,Obayashi Yoshiaki. Methods for the regeneration of a denitration catalyst:US,09/263709[P]. 2002-05-28.
[36]  Hartenstein Hans-ulrich,Hoffmann Thies. Methods of regeneration of SCR catalyst poisoned by phosphorous components in flue gas:US,12/287365[P]. 2010-06-22.
[37]  Cooper Michael D,Patel Nagesh. Method for removing calcium material from substrates:US,12/650037[P]. 2011-06-30.
[38]  Foerster Marcel. Method for regeneration iron-loaded denox catalysts:US,12/534677[P]. 2009-11-26.
[39]  Mcarthur Dennis P. Process for rejuvenating automobile emission control catalysts:US,05/640645[P]. 1977-08-02.
[40]  Hartenstein Hans-ulrich,Hoffmann Thies. Method of regeneration of SCR catalyst:US,12/287347[P]. 2010-05-25.
[41]  吴卫红,吴华,罗佳,等. SCR烟气脱硝催化剂再生研究进展[J]. 应用化工,2013,42(7):1304-1307.
[42]  Zheng Y,Jensen A D,Johnsson E. Laboratory investigation of selective catalytic reduction catalysts:Deactivation by potassium compounds and catalyst generation[J]. Industrial & Engineering Chemistry Research,2004,43(4):941-947.

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