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干/湿混法对中温SCR催化剂碱土金属中毒的影响

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陈叮叮, 沈伯雄, 刘智, 潘奕君, 刘丽君, 卢凤菊. 干/湿混法对中温SCR催化剂碱土金属中毒的影响[J]. 环境工程学报, 2019, 13(3): 694-700. doi: 10.12030/j.cjee.201808151
引用本文: 陈叮叮, 沈伯雄, 刘智, 潘奕君, 刘丽君, 卢凤菊. 干/湿混法对中温SCR催化剂碱土金属中毒的影响[J]. 环境工程学报, 2019, 13(3): 694-700. doi: 10.12030/j.cjee.201808151
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CHEN Dingding, SHEN Boxiong, LIU Zhi, PAN Yijun, LIU Lijun, LU Fengju. Effect of dry/wet mixing on alkaline earth metal poisoning in commercial medium temperature SCR catalyst[J]. Chinese Journal of Environmental Engineering, 2019, 13(3): 694-700. doi: 10.12030/j.cjee.201808151
Citation: CHEN Dingding, SHEN Boxiong, LIU Zhi, PAN Yijun, LIU Lijun, LU Fengju. Effect of dry/wet mixing on alkaline earth metal poisoning in commercial medium temperature SCR catalyst[J]. Chinese Journal of Environmental Engineering, 2019, 13(3): 694-700. doi: 10.12030/j.cjee.201808151
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干/湿混法对中温SCR催化剂碱土金属中毒的影响

  • 1.

    河北工业大学能源与环境工程学院，天津 300401

  • 基金项目:

    国家重点研发计划资助项目2018YFB0605101，2016YFC0209202

    天津市自然科学重点基金资助项目18JCZDJC39800国家重点研发计划资助项目(2018YFB0605101，2016YFC0209202)

    天津市自然科学重点基金资助项目(18JCZDJC39800)

Effect of dry/wet mixing on alkaline earth metal poisoning in commercial medium temperature SCR catalyst

  • 1.

    School of Energy & Environment, Hebei University of Technology, Tianjin 300401, China

  • Fund Project:

  • 摘要: 为探究碱土金属中毒规律以及中毒方法对中毒的影响，采用干混法和湿混法模拟CaO和MgO对商业催化剂的中毒过程。研究中毒后催化剂脱硝特性的改变及差异，并对催化剂中毒前后催化剂物理、化学性能变化进行探究。结果表明：湿混法模拟SCR催化剂中毒后脱硝效率的降低大于干混法；模拟中毒实验应该采用干混法；湿混法对于催化剂比表面积、孔径分布、表面V5+含量以及化学吸附氧的不利影响强于干混法；CaO对催化剂脱硝效率的降低大于MgO。2种中毒方法的对比研究为延长催化剂寿命提供了理论依据。
    Abstract: In order to investigate alkaline earth metal poisoning and the effects of poisoning methods on their poisoning, the dry mixing and wet mixing methods were used to simulate the commercial catalysts poisoning induced by CaO and MgO under laboratory conditions. The changes and differences of denitrification characteristics of catalysts between before and after poisoning were studied through the denitration test bench, as well as their physicochemical and chemical properties. The results showed that the decrease of denitrification efficiency for the poisoned SCR catalyst after simulated wet mixing was more than simulated dry mixing, thus the dry mixing method should be adopted in the poisoning experiment simulation. The wet mixing method had a stronger adverse effect on the specific surface area, pore size distribution, surface V5+ content, and chemisorbed oxygen of catalyst than the dry mixing method. The denitration efficiency reduction for the catalyst by CaO was greater than MgO. This study provided a reasonable solution for the subsequent catalyst poisoning simulation, and also a theoretical basis for prolonging the catalyst life.
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  • [1] 陈鸿伟, 罗敏, 王远鑫, 等. 燃煤锅炉飞灰对SCR脱硝催化剂的影响及预防措施[J]. 燃烧科学与技术, 2017, 23(3): 200-211.
    [2] LI X, LI J H, PENG Y, et al. Regeneration of commercial SCR catalysts: Probing the existing forms of arsenic oxide[J]. Environmental Science & Technology, 2015, 49(16): 9971-9978.
    [3] 袁玲, 邱兆富, 杨骥, 等. SCR催化剂碱(土)金属中毒及其改性再生研究进展[J]. 环境工程, 2018, 35(4): 117-120.
    [4] LI J H, PENG Y, HU C Z, et al. Chemical poison and regeneration of SCR catalysts for NOx removal from stationary sources[J]. Frontiers of Environmental Science & Engineering, 2016, 10(3): 413-427.
    [5] 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(3): 215-227.
    [6] 沈伯雄, 卢凤菊, 高兰君, 等. 中温商业SCR催化剂碱和碱土中毒特性研究[J]. 燃料化学学报, 2016, 44(4): 500-506.
    [7] DU X S, YANG G P, CHEN Y R, et al. The different poisoning behaviors of various alkali metal containing compounds on SCR catalyst[J]. Applied Surface Science, 2017, 392: 162-168.
    [8] GUO R T, WANG Q S, PAN W G, et al. The poisoning effect of Na and K on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3: A comparative study[J]. Applied Surface Science, 2014, 317: 111-116.
    [9] RAMOS-LUNA M A, CEDEN?O-CAERO L. Effect of sulfates and reduced-vanadium species on oxidative desulfurization (ODS) with V2O5/TiO2 catalysts[J]. Indengchemres, 2010, 50(5): 2641-2649.
    [10] 崔力文, 宋浩, 吴卫红, 等. 电站失活SCR催化剂再生试验研究[J]. 能源工程, 2012, 5(3): 43-46.
    [11] GUO R T, WANG S X, PAN W G, et al. Different poisoning effects of K and Mg on the Mn/TiO2 catalyst for selective catalytic reduction of NOx with NH3: A mechanistic study[J]. Journal of Physical Chemistry C, 2017, 121(14): 7881-7891.
    [12] 熊丽仙, 沈伯雄, 杨晓燕, 等. 纳米负载型V2O5-WO3/TiO2催化剂碱及碱土金属中毒[J]. 环境化学, 2010, 29(4): 690-695.
    [13] WANG H, CHEN X, GAO S, et al. Deactivation mechanism of Ce/TiO2 selective catalytic reduction catalysts by the loading of sodium and calcium salts[J]. Catalysis Science & Technology, 2013, 3(3): 715-722.
    [14] 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(2): 531-537.
    [15] BUSCA G, LIETTI L, RAMIS G, et al. Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts: A review[J]. Applied Catalysis B: Environmental, 1998, 18(1/2): 1-36.
    [16] INOMATA M, MIYAMOTO A, MURAKAMI Y. Mechanism of the reaction of NO and NH3 on vanadium oxide catalyst in the presence of oxygen under the dilute gas condition[J]. Journal of Catalysis, 1980, 62(1): 140-148.
    [17] 刘福东, 单文坡, 石晓燕, 等. 用于NH3选择性催化还原NOx的钒基催化剂[J].化学进展, 2012, 24(4): 445-455.
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  • 刊出日期:  2019-03-14

干/湿混法对中温SCR催化剂碱土金属中毒的影响

  • 1. 河北工业大学能源与环境工程学院，天津 300401
基金项目:

国家重点研发计划资助项目2018YFB0605101，2016YFC0209202

天津市自然科学重点基金资助项目18JCZDJC39800国家重点研发计划资助项目(2018YFB0605101，2016YFC0209202)

天津市自然科学重点基金资助项目(18JCZDJC39800)

摘要: 为探究碱土金属中毒规律以及中毒方法对中毒的影响，采用干混法和湿混法模拟CaO和MgO对商业催化剂的中毒过程。研究中毒后催化剂脱硝特性的改变及差异，并对催化剂中毒前后催化剂物理、化学性能变化进行探究。结果表明：湿混法模拟SCR催化剂中毒后脱硝效率的降低大于干混法；模拟中毒实验应该采用干混法；湿混法对于催化剂比表面积、孔径分布、表面V5+含量以及化学吸附氧的不利影响强于干混法；CaO对催化剂脱硝效率的降低大于MgO。2种中毒方法的对比研究为延长催化剂寿命提供了理论依据。

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