Reaction Kinetics, Mechanisms and Catalysis

, Volume 116, Issue 1, pp 147–158 | Cite as

Properties of platinum-containing glass-fiber catalysts in the SO2 oxidation reaction

Article

Abstract

SO2 oxidation catalysts containing small amounts (0.01–0.03 mass%) of platinum at the zirconia-promoted silica glass fibers (Pt-GFCs) demonstrate relatively high activity at moderate temperatures (below 400 °C) and the appropriate thermal stability (up to 700 °C). The catalytic activity of Pt-GFC in the SO2 oxidation reaction is provided by the small (< 1 nm) partially charged platinum clusters, while platinum in a form of large metal particles is practically inactive. Pt-GFCs have the high (up to ~20 mass%) sorption capacity with respect to SO2. Such sorption occurs via the interaction of SO2 with oxygen, either present in the gaseous reaction mixture or pre-adsorbed in the fresh GFC structure, with the possible formation of the intermediate sulfates in the glass bulk of the catalyst. Besides, Pt-GFC may effectively oxidize CO in the presence of significant amounts of sulfur dioxide.

Keywords

Sulfur dioxide Catalytic oxidation Glass-fiber catalyst Platinum Carbon monoxide 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • S. V. Vanag
    • 1
    • 2
  • E. A. Paukshtis
    • 1
    • 4
    • 5
  • A. N. Zagoruiko
    • 1
    • 2
    • 3
    • 4
  1. 1.Boreskov Institute of CatalysisNovosibirskRussia
  2. 2.Novosibirsk Technical State UniversityNovosibirskRussia
  3. 3.Tomsk Polytechnic UniversityTomskRussia
  4. 4.Novosibirsk State UniversityNovosibirskRussia
  5. 5.Tomsk State UniversityTomskRussia

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