Influence of Temperature on Gas-Phase Toluene Decomposition in Plasma-Catalytic System |
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Authors: | Vladimir Demidyuk J Christopher Whitehead |
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Institution: | (1) School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK |
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Abstract: | The decomposition of toluene on γ-alumina, MnO2-alumina and Ag2O-alumina catalysts in a plasma-catalytic reactor is tested. A comparison between catalytic, catalyst-after-plasma and catalyst-in-plasma
systems is made in 150–400 °C temperature range. An Arrhenius plot is made in order to deduce the mechanism of plasma activation.
It was found that there is no difference between the measured activation energy for catalytic and catalyst-after-plasma systems.
On the other hand it was found that plasma could activate catalyst placed inside of the discharge. Plasma treatment decreases
the activation energy for the silver-alumina catalyst but does not increase the number of active centers on the surface of
Ag2O-alumina. In case of MnO2-alumina, the activation mechanism is different: plasma does not change the activation energy and but does increase its efficiency
due to formation of additional active centers. The mechanism of catalyst activation in plasma, which includes the structural
change of manganese ions, is suggested. |
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Keywords: | Toluene Catalyst Non-thermal Plasma Activation energy |
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