Abstract
Nitrogen oxide(NO x ) emitted from stationary and mobile sources is a major air pollutant. Selective catalytic reduction(SCR) of NO x over a catalyst is a main technology for NO x elimination. Catalysts used for practical applications would be deactivated in flue containing SO2. In this work, three typical commercial catalysts were investigated before and after SO2 treatment. The catalysts were characterized by X-ray diffraction(XRD), X-ray fluorescene(XRF), temperature programme reduction(TPR), temperature programme desorption(TPD) and diffuse reflectance Fourier transform infrared(DRIFT) techniques. Results showed that SO2 treatment significantly influenced the performance of V2O5/TiO2 catalyst. The amount of V2O5 in the catalyst primarily affected the accumulation of sulfur species in the SO2 atmosphere. The performance of catalysts with small amounts of V2O5 could be improved under the same experimental conditions for acidity enhancement.
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Supported by the National Natural Science Foundation of China(No.21277009) and the Education Commission Project of Beijing Municipality, China(No.TJSHG201310005003).
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Huang, Q., Song, L., He, H. et al. Effects of SO2 treatment of commercial catalysts on selective catalytic reduction of NO x by NH3 . Chem. Res. Chin. Univ. 32, 414–417 (2016). https://doi.org/10.1007/s40242-016-6080-z
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DOI: https://doi.org/10.1007/s40242-016-6080-z