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Performance of sintering dust-modified metal oxides catalyst in SCR-NH3 technique

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Abstract

Using sintering dust as a raw material, selective catalytic reduction (SCR) catalysts were pretreated with water and acid washing (HF, HCl, HNO3 and H2SO4) and then modified by different metal oxides (Ce, Cu, Eu, Nd and Mn) with an impregnation method. Based on this, the catalyst was supported by ZrO2, Al2O3 and TiO2. The catalysts were ascertained by various characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and N2 adsorption–desorption analysis. The results showed that the main component of sintering dust was iron oxide (> 50 wt%), which is a feasible material for fabricating SCR catalysts. The catalysts pretreated by HF and modified by CeO2 improve the denitration efficiency. When modified with 10 wt% CeO2, the Ce10-PSDCHF catalyst sample exhibited the best NOx conversion rate, reaching 76.4% at 280 °C. The catalyst modified by ZrO2 was dispersed well and had best denitration efficiency. The denitration efficiency of SCR increased with the increase in ZrO2 loading and the NOx conversion rate of 0.25-Ce10-PSDCHF/ZrO2 catalyst reached 85% at 280 °C. The modification and support of metal oxides improve the denitration efficiency, which makes the sintering dust have promising industrial application prospects. This work would be timely technical guidance and valuable insights for the application of sintering dust.

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Funding

This work was founded by the National Natural Science Foundation of China (No. 52070127).

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Authors and Affiliations

  1. School of Resources and Environmental Engineering, Shanghai Polytechnic University (SSPU), Shanghai, 201209, People’s Republic of China

    Dazhan Jiang, Yaru Wang, Yue Zhou, Zetong Li, Shuaipeng Li, Shubin Zhang, Shengwen Chen & Zhiguo Sun

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  1. Dazhan Jiang
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  2. Yaru Wang
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  3. Yue Zhou
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  4. Zetong Li
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  5. Shuaipeng Li
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  6. Shubin Zhang
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  7. Shengwen Chen
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  8. Zhiguo Sun
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by DJ, YW and ZL. The first draft of the manuscript was written by SL and all authors commented on the previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Shengwen Chen or Zhiguo Sun.

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Jiang, D., Wang, Y., Zhou, Y. et al. Performance of sintering dust-modified metal oxides catalyst in SCR-NH3 technique. Res Chem Intermed 49, 2299–2319 (2023). https://doi.org/10.1007/s11164-023-04995-8

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  • DOI: https://doi.org/10.1007/s11164-023-04995-8

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