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Effect of SO2 on a cordierite honeycomb supported CuO catalyst for NO reduction by NH3

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Supporting CuO on a Al2O3-coated cordierite honeycomb yields a good catalyst (CuO/HC–Al) for selective catalytic reduction (SCR) of NO with NH3 at 350–500 °C. SO2 has complex effects on the catalyst’s activity. It significantly promotes the SCR activity through conversion of CuO to CuSO4, however, when a certain amount of CuO is converted, it slightly decreases the SCR activity through competitive adsorption with NH3. This competitive adsorption reduces the amount of NH3 adsorbed on the catalyst surface, especially on the sites highly active to the SCR. It also prevents transformation of CuO to CuSO4 and as a result, the catalysts subjected to pre-sulfation and in situ sulfation show different SCR behaviors.

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Authors and Affiliations

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China

    Qingya Liu, Zhenyu Liu, Guoyong Xie & Zhanggen Huang

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  1. Qingya Liu
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  2. Zhenyu Liu
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  3. Guoyong Xie
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  4. Zhanggen Huang
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Correspondence to Zhenyu Liu.

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Liu, Q., Liu, Z., Xie, G. et al. Effect of SO2 on a cordierite honeycomb supported CuO catalyst for NO reduction by NH3. Catal Lett 101, 27–30 (2005). https://doi.org/10.1007/s10562-004-3744-y

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  • DOI: https://doi.org/10.1007/s10562-004-3744-y

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