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      FT-IR spectroscopic investigation of the effect of SO2 on the SCR of NOx with propene over ZrO2–Nb2O5 catalyst

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      Author(s)
      Kantcheva, M.
      Cayirtepe, I.
      Naydenov, A.
      Ivanov, G.
      Date
      2011-11-01
      Source Title
      Catalysis Today
      Print ISSN
      0920-5861
      Electronic ISSN
      1873-4308
      Publisher
      Elsevier
      Volume
      176
      Issue
      1
      Pages
      437 - 440
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The SO2 tolerance of a catalyst based on ZrO2–Nb2O5 solid solution (mole ratio ZrO2:Nb2O5 = 1:6) in the catalytic activity for NOx reduction with propene in excess oxygen has been studied. No loss in the C3H6-SCR activity was observed for 2 h after the addition of 56 ppm of SO2 to the reaction mixture. When the concentration of SO2 has been increased to 200 ppm (the so-called fast poisoning experiment) the activity of the catalyst decreased by 13% and remained unchanged for more than 5 h under these conditions. The effect of SO2 on the surface reaction of the SCR reactants has been investigated by in situ FT-IR spectroscopy and mechanism for the suppression of the catalytic activity at high concentration of the poison has been proposed.
      Keywords
      Zro2-nb2o5 Solid Solution
      C3h6-scr Of Nox
      Effect Of So2
      In Situ Ft-ir Spectroscopy
      Mechanism Of So2 Poisoning
      Permalink
      http://hdl.handle.net/11693/12074
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.cattod.2010.10.072
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