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The Behavior of Different Pretreated La0.8Sr0.2MnO3/α-Al2O3 in CH4-SCR of NO with Water Vapor

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Abstract

La0.8Sr0.2MnO3/α-Al2O3 shows its potential to be an efficient catalyst for CH4-SCR of NO in our former study. This paper focuses on its activity with water vapor in simulated flue gas and two different pretreatments aimed at improving its performance were also studied. The effects of temperature, residence time and initial O2 content were investigated by experiment. XRD and SEM results indicate that all three catalysts can remove NO and the vapor-treated catalyst may have the worst behavior due to its poor porous structure. Experiment results show the fresh catalyst can gain a high NO removal rate (> 95%) in certain conditions as well as the other two pretreated catalysts. In general, the NO conversion rates decrease with the increase of the initial O2 content. The calcined catalyst has the best oxygen resistance ability while the vapor-treated catalyst has the worst tolerance to O2. NO conversion rates over the calcined catalyst can remain steady above 90% with 0–4% O2. It seems calcination plays a role in improving the catalytic properties of La0.8Sr0.2MnO3/α-Al2O3. This result can provide some information for the practical use of La0.8Sr0.2MnO3 in industry.

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Acknowledgements

This work is supported by the National Key Research and Development Program of China (No. 2016YFC0801904) and by Program for New Century Excellent Talents in University of Chinese Education Ministry (NCET-13-0468).

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Authors and Affiliations

  1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Shan Huang, Zhaohui Teng, Na Li & Qulan Zhou

  2. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, 61801, USA

    Shan Huang

  3. Shenzhen ILNG Energy Technology CO., LTD, Shenzhen Hi-tech Park, Shenzhen, 518061, China

    Hang Zhang

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  1. Shan Huang
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  2. Hang Zhang
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  3. Zhaohui Teng
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  4. Na Li
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Correspondence to Na Li.

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Huang, S., Zhang, H., Teng, Z. et al. The Behavior of Different Pretreated La0.8Sr0.2MnO3/α-Al2O3 in CH4-SCR of NO with Water Vapor. Catal Lett 149, 3138–3147 (2019). https://doi.org/10.1007/s10562-019-02865-w

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  • DOI: https://doi.org/10.1007/s10562-019-02865-w

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