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The kinetics of methane oxidative coupling over Mn_2O_3-Na_2WO_4/SiO_2 catalyst has been studied. Kinetic study carried out under differentconditions gave fractional reaction orders and apparent activation enetgy formethane conversion of 243. 3 kJ/mol.The kinetic results are interpreted via areaction model condsting of Rideal-redox mechanism. Methyl radical andsurface oxygen are assumed as the steady-state intermediates. The constants,k_1, k_2, x and k_3~2/k_4 were obtained fot every temperature. The activity is relatedto k_1 and k_2, while the selectivity (C_2/C_1) is related to k_3~2/k_4.
Kinetic study carried out under different conditioning of gave fractional reaction orders and apparent activation enetgy for methane conversion of 243. 3 kJ / mol. Kinetic results are interpreted via areaction model condsting of Rideal-redox mechanism. Methyl radical and surface oxygen are assumed as the steady-state intermediates. The constants, k_1, k_2, x and k_3 ~ 2 / k_4 were obtained fot every temperature. The activity is related to k_1 and k_2, while the selectivity (C_2 / C_1) is related to k_3 ~ 2 / k_4.