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DeNO x performance and characteristic study for transition metals doped iron based catalysts

  • The 11th Korea-China Clean Energy Workshop
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Abstract

Novel, environmentally-benign catalysts for selective catalytic reduction of NO x were prepared by citric method through introducing transition metal elements (Ce, Cu and Co) into iron oxide. The physical-chemical properties of different catalysts were investigated by the characterization technologies like N2-physisorption, XRD, NH3/NOTPD and H2-TPR. The results indicated that the introduction of transition metal elements increased the specific surface area and adsorption ability for reactants (NH3 and NO x ). The redox capacity for the doped catalysts was improved at the same time. These characteristics all contributed to the improvement of catalytic performance. The CoFeO x catalyst exhibited the widest temperature window for SCR reaction, and the CeFeO x catalyst showed the most obvious decline of NO x conversion with the elevation of temperature above 250 °C. Water vapor inhibited the SCR activity at low temperatures and relieved the decline of NO x conversion at higher temperatures. Meanwhile, the formation of N2O was inhibited. The pretreatment of SO2 leaded to the sulfation of the active species for different catalysts. The decline of redox capacity and the reduction of active nitrate adsorbed species accounted for the serious loss of SCR activity at low temperatures. The abundant surface acid sites brought by the sulfation process might be the main reason for good SCR activity in the medium temperature range.

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Authors and Affiliations

  1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, P. R. China

    Lin Zhu, Zhaoping Zhong, Han Yang & Lixia Wang

  2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China

    Chunhua Wang

Authors
  1. Lin Zhu
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  2. Zhaoping Zhong
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  3. Han Yang
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  4. Chunhua Wang
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  5. Lixia Wang
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Corresponding author

Correspondence to Zhaoping Zhong.

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The paper will be reported in the 11th China-Korea Clean Energy Workshop.

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Zhu, L., Zhong, Z., Yang, H. et al. DeNO x performance and characteristic study for transition metals doped iron based catalysts. Korean J. Chem. Eng. 34, 1229–1237 (2017). https://doi.org/10.1007/s11814-016-0369-y

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  • DOI: https://doi.org/10.1007/s11814-016-0369-y

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