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Controlling mechanisms in the selective oxidation of toluene to benzaldehyde

✍ Scribed by K.A. Reddy; L.K. Doraiswamy

Publisher: Elsevier Science
Year: 1969
Tongue: English
Weight: 917 KB
Volume: 24
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(69)85070-0

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✦ Synopsis

Ahstraet-Using a selective catalyst consisting of molybdenum oxide doped with tungstic oxide on alumina, the kinetics of the vapour-phase oxidation of toluene by air has been studied. The oxidation has been shown to proceed according to a parallel model (toluene + benzaldehyde, and toluene + CO,). The overall oxidation reaction as well as the main reaction leading to benzaldehyde formation appear to exhibit a shift in the controlling regime from chemical to diffusional control around 475°C. This shift has been observed by non-linear estimation of the activation energy by a reparameterised form of the Arrhenius equation, but more experimental work at higher temperatures is required to confirm it.

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