Influence of the reactant gas on the electrical properties of alumina-supported tin dioxide catalysts
The surface dynamics of SnO 2 /γ-Al 2 O 3 catalysts with different tin dioxide loadings (3 and 20 wt%) prepared by the impregnation method were investigated by using in situ electrical/dielectric measurements. The samples were characterized by BET, inductively coupled plasma atomic emission spectros...
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Veröffentlicht in: | Reaction Kinetics 2012-02, Vol.105 (1), p.163-172 |
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Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The surface dynamics of SnO
2
/γ-Al
2
O
3
catalysts with different tin dioxide loadings (3 and 20 wt%) prepared by the impregnation method were investigated by using in situ electrical/dielectric measurements. The samples were characterized by BET, inductively coupled plasma atomic emission spectroscopy and X-ray diffraction methods. The propylene oxidation reaction, in the temperature range of 30–400 °C, was used to identify the catalytic activity of SnO
2
based catalysts. Results are discussed on the bases of the electrical changes accompanying variation of the active phase content. The conductance/capacitance of supported samples evidenced the reciprocal influence of the support and of the guest oxide. |
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ISSN: | 1878-5190 1878-5204 |
DOI: | 10.1007/s11144-011-0409-x |