Properties of Platinum-Containing Glass-Fiber Catalysts in the SO2 Oxidation Reaction
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190
, E-ISSN: 1878-5204
|
| Output data |
Year: 2015,
Volume: 116,
Number: 1,
Pages: 147-158
Pages count
: 12
DOI:
10.1007/s11144-015-0875-7
|
| Tags |
Carbon monoxide, Catalytic oxidation, Glass-fiber catalyst, Platinum, Sulfur dioxide |
| Authors |
Vanag S.V.
1,2
,
Paukshtis E.A.
1,4,5
,
Zagoruiko A.N.
1,2,3,4
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, prospekt Lavrentieva 5, Novosibirsk 630090, Russia
|
| 2 |
Novosibirsk Technical State University, prospekt K.Marksa, Novosibirsk 630073, Russia
|
| 3 |
Tomsk Polytechnic University, prospekt Lenina, 30, Tomsk 634050, Russia
|
| 4 |
Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090, Russia
|
| 5 |
Tomsk State University, prospekt Lenina, 43, Tomsk 634050, Russia
|
|
The SO2 oxidation catalysts, containing small amounts (0.01-0.03% mass) of platinum at the zirconia-promoted silica glass fibers (Pt-GFCs) demonstrate the relatively high activity at moderate temperatures (below 400C) and the appropriate thermal stability (up to 700C). The catalytic activity of Pt-GFC in the SO2 oxidation reaction is provided by the small, less than 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.