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Low-Temperature Selective Catalytic Reduction of NO with NH3 over Fe–Ce–O x Catalysts

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Abstract

In this study, we used a simple impregnation method to prepare Fe–Ce–O x catalysts and tested them regarding their low-temperature (200–300 °C) selective catalytic reduction (SCR) of NO using NH3. We investigated the effects of Fe/Ce molar ratio, the gas hourly space velocity (GHSV), the stability and SO2/H2O resistance of the catalysts. The results showed that the FeCe(1:6)O x (Ce/Fe molar ratio is 1:6) catalyst, which has some ordered parallel channels, exhibited good SCR performance. The FeCe(1:6)O x catalyst had the highest NO conversion with an activity of 94–99% at temperatures between 200 and 300 °C at a space velocity of 28,800 h−1. The NO conversion for the FeCe(1:6)O x catalyst also reached 80–98% between 200 and 300 °C at a space velocity of 204,000 h−1. In addition, the FeCe(1:6)O x catalyst demonstrated good stability in a 10-h SCR reaction at 200–300 °C. Even in the presence of SO2 and H2O, the FeCe(1:6)O x catalyst exhibited good SCR performance.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (No. 21206108) and Tianjin Municipal Science and Technology Commission (No. 14JCYBJC21200).

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Authors and Affiliations

  1. School of Sciences, Tianjin University, Tianjin, 300072, China

    Yan Sun, Ying Guo & Yajuan Wei

  2. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Wei Su

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  1. Yan Sun
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  2. Ying Guo
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  3. Wei Su
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  4. Yajuan Wei
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Correspondence to Wei Su.

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Sun, Y., Guo, Y., Su, W. et al. Low-Temperature Selective Catalytic Reduction of NO with NH3 over Fe–Ce–O x Catalysts. Trans. Tianjin Univ. 23, 35–42 (2017). https://doi.org/10.1007/s12209-016-0017-y

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  • DOI: https://doi.org/10.1007/s12209-016-0017-y

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