Abstract
Kinetics and catalytic behavior of NiO supported on alumina and on activated carbon and NiMoO 4 supported on alumina have been studied in the liquid phase oxidation of cumene. The catalysts have been characterized by means of DTA, TGA, X-ray, ir, and BET studies. Detailed studies of the concentration of main products of cumene along with the effect of catalyst weight, and hydrocarbon concentration on the rate of oxidation were conducted at 80 °C employing these supported catalysts. A reaction mechanism is proposed in which the catalyst plays an important role in the initiation and termination steps. Rate equations derived are in good agreement with the experimental data. It was observed that carbon as a support relative to alumina (NiO catalysts) induced increased activity, lower activation energies, and shifted the limiting oxidation rate to lower catalyst amounts.
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