Abstract
Kinetic studies on the oxidative coupling of methane at 760, 770 and 780°C have been conducted in a differential tubular flow reactor, using perovskite titanate as the reaction catalyst. Correlation of the kinetic data has been performed with the mechanisms proposed. At low oxygen partial pressure, the experimental results best fitted the Mars-Van Krevelen type mechanism, whereas at higher partial pressure of oxygen, a Langmuir-Hinshelwood type model provided the best fit to the data. A model for the rate of reaction has been derived assuming methyl radical as the intermediate.
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