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La-Cu/ZSM-5催化剂NH3选择性催化还原NO的性能

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其其格吉日嘎拉, 李晨曦, 叶青, 程锦, 程水源, 康天放. La-Cu/ZSM-5催化剂NH3选择性催化还原NO的性能[J]. 环境化学, 2020, (9): 2567-2575. doi: 10.7524/j.issn.0254-6108.2019062503
引用本文: 其其格吉日嘎拉, 李晨曦, 叶青, 程锦, 程水源, 康天放. La-Cu/ZSM-5催化剂NH3选择性催化还原NO的性能[J]. 环境化学, 2020, (9): 2567-2575. doi: 10.7524/j.issn.0254-6108.2019062503
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MUNKHJARGAL TSETSEGJARGAL, LI Chenxi, YE Qing, CHENG Jin, CHENG Shuiyuan, KANG Tianfang. La-Cu/ZSM-5 catalyst selectively reduced NO by NH3-SCR[J]. Environmental Chemistry, 2020, (9): 2567-2575. doi: 10.7524/j.issn.0254-6108.2019062503
Citation: MUNKHJARGAL TSETSEGJARGAL, LI Chenxi, YE Qing, CHENG Jin, CHENG Shuiyuan, KANG Tianfang. La-Cu/ZSM-5 catalyst selectively reduced NO by NH3-SCR[J]. Environmental Chemistry, 2020, (9): 2567-2575. doi: 10.7524/j.issn.0254-6108.2019062503
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La-Cu/ZSM-5催化剂NH3选择性催化还原NO的性能

  • 北京工业大学, 区域大气复合污染防治北京市重点实验室, 北京, 100124

    • 通讯作者: 叶青, E-mail: yeqing@bjut.edu.cn ; 
  • 基金项目:

    国家自然科学基金（21277008，20777005）和国家重点研发计划项目（2017YFC0209905）资助.

La-Cu/ZSM-5 catalyst selectively reduced NO by NH3-SCR

  • Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China

    • Corresponding author: YE Qing, yeqing@bjut.edu.cn ; 
  • Fund Project: Supported by the National Natural Science Foundation of China(21277008, 20777005) and National Key R&D Program of China (2017YFC0209905).

  • 摘要: 通过旋蒸法将Cu（Cu（NO3）2·3H2O）或La（La（NO3）3·6H2O）负载在ZSM-5载体上，制备了0.75Cu/ZSM-5、0.5La/ZSM-5和xLa-0.75Cu/ZSM-5系列样品，使用X射线粉末衍射（XRD）、N2-吸附/脱附、氢气程序升温还原（H2-TPR）、氨气程序升温脱附（NH3-TPD）等表征技术对所制样品进行了表征，研究了其NH3选择性催化还原（NH3-SCR）NO性能.实验结果表明，La与Cu金属氧化物改性的0.5La-0.75Cu/ZSM-5催化剂具有最佳活性，催化还原NO性能优异，具有较宽的活性温度窗口.0.5La-0.75Cu/ZSM-5样品在200—450℃温度范围内催化效率均超过90%，在250—350℃时催化效率达到了98%以上，这归结于其丰富的中酸性位和优异的氧化还原性能.
    Abstract: A series of catalysts Cu/ZSM-5, La/ZSM-5 and xLa-Cu/ZSM-5 were prepared by the impregnating ZSM-5 with Cu(NO3)2·3H2O and/or La(NO3)3·6H2O. The series of catalysts were characterized by XRD, BET, H2-TPR and NH3-TPD technologies. The performance of the selective catalytic reduction of NO with NH3 was investigated. Characterized results indicated that La and Cu bimetal modification of La-Cu/ZSM-5 catalyst possessed excellent catalytic activity and showed a wide activity temperature window. The catalytic efficiency of 0.5La-0.75Cu/ZSM-5 catalyst was more than 90% within the scope of 200—450 ℃ and reached above 98% within the scope 250—350 ℃. This catalytic activity attributed to its abundant medium acid sites and great redox properties.
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  • 收稿日期:  2019-06-25

La-Cu/ZSM-5催化剂NH3选择性催化还原NO的性能

    通讯作者: 叶青, E-mail: yeqing@bjut.edu.cn ; 
  • 北京工业大学, 区域大气复合污染防治北京市重点实验室, 北京, 100124
  • 收稿日期:  2019-06-25
基金项目:

国家自然科学基金（21277008，20777005）和国家重点研发计划项目（2017YFC0209905）资助.

摘要: 通过旋蒸法将Cu（Cu（NO3）2·3H2O）或La（La（NO3）3·6H2O）负载在ZSM-5载体上，制备了0.75Cu/ZSM-5、0.5La/ZSM-5和xLa-0.75Cu/ZSM-5系列样品，使用X射线粉末衍射（XRD）、N2-吸附/脱附、氢气程序升温还原（H2-TPR）、氨气程序升温脱附（NH3-TPD）等表征技术对所制样品进行了表征，研究了其NH3选择性催化还原（NH3-SCR）NO性能.实验结果表明，La与Cu金属氧化物改性的0.5La-0.75Cu/ZSM-5催化剂具有最佳活性，催化还原NO性能优异，具有较宽的活性温度窗口.0.5La-0.75Cu/ZSM-5样品在200—450℃温度范围内催化效率均超过90%，在250—350℃时催化效率达到了98%以上，这归结于其丰富的中酸性位和优异的氧化还原性能.

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