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首页> 外文期刊>Environmental Science & Technology >Investigation of Suitable Templates for One-Pot-Synthesized Cu-SAPO-34 in NO_x Abatement from Diesel Vehicle Exhaust
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Investigation of Suitable Templates for One-Pot-Synthesized Cu-SAPO-34 in NO_x Abatement from Diesel Vehicle Exhaust

机译：从柴油车排气中NO_X释放的单盆合成Cu-SAPO-34合适模板的研究

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摘要

The control of NO_x emission from diesel vehicles is of great importance to the environment, and Cu-SAPO-34 is considered to be an effective catalyst for the abatement of NO_x from diesel vehicles. Along with catalytic activity, hydrothermal stability is a key property for NO_x abatement catalysts. The attack of Cu species and framework atoms by H_2O may result in activity loss under both low/high temperature humid conditions, which are inevitable in practical application. Therefore, apart from good catalytic activity, hydrothermal stability under both low/high temperatures for Cu-SAPO-34 is also critical for NO_x control in diesel vehicles. Three Cu-SAPO-34 samples were prepared by a one-pot hydrothermal method using propylamine, triethylamine, and morpholine, with Cu-TEPA (tetraethylenepent- amine) as the cotemplate. The NH_3-SCR activity and the effects of hydrothermal aging at 70 and 800 °C on these Cu-SAPO-34 samples were investigated. The type of cotemplate can affect the Si and Cu species in one-pot-synthesized Cu-SAPO-34 catalysts, so that the catalytic activity as well as the low/high temperature hydrothermal stability is affected by the choice of template. Generally speaking, Cu-SAPO-34 prepared using PA as cotemplate showed superior catalytic activity and hydrothermal stability under low/high temperatures compared with the other two catalysts, which makes PA a more suitable template for one-pot-synthesized Cu-SAPO-34 for use in NO_x abatement from diesel vehicle exhaust.
机译：从柴油车辆的NO_X排放对环境非常重要，CU-SAPO-34被认为是从柴油车辆中减去NO_X的有效催化剂。随着催化活性，水热稳定性是NO_X减排催化剂的关键性质。 Cu物种和骨架原子通过H_2O的攻击可能导致低/高温潮湿条件下的活动损失，这在实际应用中是不可避免的。因此，除了良好的催化活性外，Cu-SAPO-34的低/高温下的水热稳定性也对柴油车辆中的NO_X控制也是关键的。使用丙胺，三乙胺和吗啉的单罐水热法制备三种Cu-SAPO-34样品，用Cu-Tepa（四亚乙基磺胺胺）作为COTEMPLATE。研究了NH_3-SCR活性和水热老化在70和800℃下在这些Cu-SAPO-34样品上的影响。 CoTemplate的类型可以影响一次合成的Cu-Sapo-34催化剂中的Si和Cu物种，使催化活性以及低/高温水热稳定性受到模板的选择影响。一般而言，与其他两种催化剂相比，使用Pa作为COTemplate制备的Cu-Sapo-34在低/高温下显示出优异的催化活性和水热稳定性，这使得PA更合适的一锅合成的Cu-Sapo-34模板用于从柴油车排气的NO_X中使用。

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  • 来源
    《Environmental Science & Technology》 |2020年第13期|7870-7878|共9页
  • 作者

    Jinpeng Du; Xiaoyan Shi; Yulong Shan; Wenshuo Zhang; Yunbo Yu; Wenpo Shan; Hong He;

  • 作者单位

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R China University of Chinese Academy of Sciences Beijing 100049 P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 P. R. China;

    Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 P. R China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research Station Chinese Academy of Sciences Ningbo 315800 P. R China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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