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快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响

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杨晓刚, 马强, 牛国平, 徐晓涛. 快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响[J]. 环境工程学报, 2018, 12(7): 1968-1976. doi: 10.12030/j.cjee.201712189
引用本文: 杨晓刚, 马强, 牛国平, 徐晓涛. 快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响[J]. 环境工程学报, 2018, 12(7): 1968-1976. doi: 10.12030/j.cjee.201712189
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YANG Xiaogang, MA Qiang, NIU Guoping, XU Xiaotao. Effect of fast SCR reaction on denitration characteristics of commercial V2O5-WO3/TiO2 catalysts[J]. Chinese Journal of Environmental Engineering, 2018, 12(7): 1968-1976. doi: 10.12030/j.cjee.201712189
Citation: YANG Xiaogang, MA Qiang, NIU Guoping, XU Xiaotao. Effect of fast SCR reaction on denitration characteristics of commercial V2O5-WO3/TiO2 catalysts[J]. Chinese Journal of Environmental Engineering, 2018, 12(7): 1968-1976. doi: 10.12030/j.cjee.201712189
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快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响

  • 1.

    西安热工研究院有限公司，西安 710054

  • 基金项目:

    2017年陕西省博士后科研基金资助项目（2017BSHQYXMZZ09）

Effect of fast SCR reaction on denitration characteristics of commercial V2O5-WO3/TiO2 catalysts

  • 1.

    Xi’an Thermal Power Research Institute Co. Ltd., Xi’an 710054, China

  • Fund Project:

  • 摘要: 通过实验考察了快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响。在250～375 ℃的实验温度区间内，快速SCR反应能适应更宽的温度窗口而保持较高的效率；快速SCR反应在高空间速度（SV=12 400 h-1）的脱硝效率甚至要高于标准SCR反应在低空间速度（SV=7 400 h-1）时的脱硝效率；快速SCR反应在410～820 mg·m-3的NOx质量浓度内脱硝效率波动不大。通过快速SCR反应和标准SCR反应条件下的催化剂活性分析和体积量计算，快速SCR反应相较标准SCR反应可以提高活性1.4倍，减少催化剂用量28.57%，同时通过催化剂寿命计算，快速SCR反应可以延长现有SCR脱硝系统V2O5-WO3/TiO2催化剂寿命22 582 h，延长催化剂的更换周期941 d。
    Abstract: The effects of fast SCR reaction on the denitration performance of commercial V2O5-WO3/TiO2 catalysts were investigated experimentally. In the experimental temperature range of 250 to 375 ℃, fast SCR reaction can adapt to wider temperature window and maintain high efficiency. The denitration efficiency of the fast SCR reaction at the high space velocity (SV = 12 400 h-1) is even higher than that of the standard SCR reaction at the low space velocity (SV = 7 400 h-1). The denitration efficiency of the fast SCR reaction fluctuates little in the range of 410 to 820 mg·m-3 NOx concentration. Through the catalyst activity analysis and the amount of catalyst under the condition of fast SCR reaction and standard SCR reaction, the activity of fast SCR reaction is 1.4 times higher than that of standard SCR reaction, and the amount of catalyst is reduced by 28.57%. The fast SCR reaction can prolong the service life of the existing SCR denitrification system V2O5-WO3/TiO2 catalyst for 22 582 h, and prolong the replacement period of the catalyst for 941 d.
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  • [1] MARTINEZ A, CABEZAS J.Emission control system for nitrogen oxides using enhanced oxidation, scrubbing, and biofitration[J].Environmental Engineering Science,2009,26(5):883-890 10.1089/ees.2007.0249
    [2] IRFAN M F,GOO J H,KIM S D.Effects of NO2, CO, O2, and SO2 on oxidation kinetics of NO over Pt-WO3/TiO2 catalyst for fast selective catalytic reduction process[J].International Journal of Chemical Kinetics,2006,38(10):613-620 10.1002/kin.20194
    [3] 王乐乐，孔凡海，何金亮，等．超低排放形势下SCR脱硝系统运行存在问题与对策[J]．热力发电，2016,45(12):19-24
    [4] KOEBEL M,ELENSER M,KLEEMANN M.Urea-SCR:A promising technique to reduce NOx emissions from automotive disel engines[J].Catalysis Today,2000,59(3/4):335-345 10.1016/S0920-5861(00)00299-6
    [5] NOVA I,CIARDELLI C,TRONCONI E.Unifying redox kinetics for standard and fast NH3-SCR over a V2O5-WO3/TiO2 catalyst[J].American Institute of Chemical Engineers,2009,55(6):1514-1529 10.1002/aic.11750
    [6] MADIA G,KOEBEL M, ELSENER M,et al.Side reaction in the selective catalytic reduction of NOx with various NO2 fractions[J].Industrial and Engineering Chemistry Research,2002,41(16):4008-4015 10.1021/ie020054c
    [7] MADIA G,KOEBEL M, ELSENER M,et al.The effect of an oxidation precatalyst on the NOx reduction by ammonia SCR[J].Industrial and Engineering Chemistry Research,2002,41(15):3512-3517 10.1021/ie0200555
    [8] 王智化，周俊虎，温正城，等．利用臭氧同时脱硫脱硝过程中NO的氧化机理研究[J]．浙江大学学报(工学版),2007,41(5):765-769
    [9] 李广培，秘密，董勇，等．二氧化氯对NO和Hg的气相氧化性能的实验研究[J]．中国电机工程学报,2015,35(13):3324-3330
    [10] KASPER J M, CLAUSEN C A, COOPER C D.Control of nitrogen oxide emissions by hydrogen peroxide-enhanced gas-phase oxidation of nitric oxide[J].Journal of the Air & Waste Management Association,1996,46(2):127-133 10.1080/10473289.1996.10467444
    [11] 杨恂，黄锐，孔凡海，等．SCR脱硝催化剂活性的测量和应用[J]．热力发电,2013,42(1):15-19
    [12] 廖永进，陆继东，黄秋雄，等．选择性催化还原服役后催化剂活性及动力学实验研究[J]．中国电机工程学报,2013,33(17):37-44
    [13] 董长青，马帅，傅玉，等．火电厂SCR脱硝催化剂寿命预估研究[J]．华北电力大学学报（自然科学版）,2016,43(3):64-68
    [14] IWASAKI M,SHINJOH H.A comparative study of “standard”,“fast”and “NO2”SCR reactions over Fe/zeolite catalyst[J].Applied Catalysis A:General,2010,39(1):71-77 10.1016/j.apcata.2010.09.034
    [15] 贺泓，李俊华，何洪,等.环境催化[M]．2版．北京：科学出版社，2008:219-229
    [16] 陆涛，贾双燕，李晓芸．关于烟气脱硝的SNCR工艺及其技术经济分析[J] .现代电力,2004,21(1):17-22
    [17] KROCHER O,DEVADAS M,ELSENER M,et al.Investigation of the selective catalytic reduction of NO by NH3 on Fe-ZSM5 monolith catalysts[J].Applied Catalysis B:Environmental,2006,66(3/4):208-216 10.1016/j.apcatb.2006.03.012
    [18] ZHU Z P,LIU Z Y,LIU S J,et al.A novel carbon supported vanndium oxide catalyst for NO reduction with NH3 at low temperatures[J].Applied Catalysis B: Environmental,1999,23(4):229-233
    [19] ZHANG L, WANG D,LIU Y, et al.SO2 poisoning impact on the NH3-SCR reaction over a commercial Cu-SAPO-34 SCR catalyst[J].Applied Catalysis B: Environmental,2014,156-157(9):371-377 10.1016/j.apcatb.2014.03.030
    [20] 王勇强，孙保民，肖海平，等．Cu负载量对Cu-ZSM-5晶相及其快速SCR反应性能的影响[J]．动力工程学报,2016,36(6):461-467
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  • 刊出日期:  2018-07-26

快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响

  • 1. 西安热工研究院有限公司，西安 710054
基金项目:

2017年陕西省博士后科研基金资助项目（2017BSHQYXMZZ09）

摘要: 通过实验考察了快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响。在250～375 ℃的实验温度区间内，快速SCR反应能适应更宽的温度窗口而保持较高的效率；快速SCR反应在高空间速度（SV=12 400 h-1）的脱硝效率甚至要高于标准SCR反应在低空间速度（SV=7 400 h-1）时的脱硝效率；快速SCR反应在410～820 mg·m-3的NOx质量浓度内脱硝效率波动不大。通过快速SCR反应和标准SCR反应条件下的催化剂活性分析和体积量计算，快速SCR反应相较标准SCR反应可以提高活性1.4倍，减少催化剂用量28.57%，同时通过催化剂寿命计算，快速SCR反应可以延长现有SCR脱硝系统V2O5-WO3/TiO2催化剂寿命22 582 h，延长催化剂的更换周期941 d。

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