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      Sulfur-tolerant BaO/ZrO2/TiO2/Al2O3 quaternary mixed oxides for deNOX catalysis

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      Author(s)
      Say, Z.
      Mihai, O.
      Tohumeken, M.
      Ercan, K. E.
      Olsson, L.
      Ozensoy, E.
      Date
      2017
      Source Title
      Catalysis Science and Technology
      Print ISSN
      2044-4753
      Electronic ISSN
      2044-4761
      Publisher
      Royal Society of Chemistry
      Volume
      7
      Issue
      1
      Pages
      133 - 144
      Language
      English
      Type
      Article
      Item Usage Stats
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      152
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      Abstract
      Advanced quaternary mixed oxide materials in the form of BaO/Al2O3/ZrO2/TiO2 functionalized with Pt active sites (i.e. Pt/BaO/AZT) were synthesized and structurally characterized via XRD and BET in comparison to a conventional Pt/20BaO/Al benchmark NSR/LNT catalyst. The interactions of these catalysts' surfaces with SOx and NOx gases were monitored via in situ FTIR and TPD. There exists a delicate trade-off between NOx storage capacity (NSC) and sulfur uptake/poisoning which is strongly governed by the BaO loading/ dispersion as well as the surface structure and acidity of the support material. Flow reactor measurements performed under realistic catalytic conditions show the high NOx activity for the Pt/20BaO/AZT catalyst at 573 K. After sulfur poisoning and subsequent regeneration at 773 and 973 K, Pt/20BaO/AZT surpassed the NOx catalytic performance at 573 K of all other investigated materials including the conventional Pt/ 20BaO/Al benchmark catalyst.
      Keywords
      Benchmarking
      Catalyst activity
      Catalyst poisoning
      Catalysts
      Economic and social effects
      Sulfur
      Catalytic conditions
      Catalytic performance
      Flow reactors
      Functionalized
      Storage capacity
      Sulfur poisoning
      Sulfur uptakes
      Support materials
      Platinum
      Permalink
      http://hdl.handle.net/11693/37251
      Published Version (Please cite this version)
      http://dx.doi.org/10.1039/c6cy01898j
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