A detailed kinetic modeling of the noncatalytic processes of thermal pyrolysis\t\t\t\t\tand steam and carbon dioxide reforming of methane revealed almost completely\t\t\t\t\tidentical kinetics of the methane conversion in these processes. This suggests\t\t\t\t\tthat, in the temperature range 1400–1800 K, the initial stage of conversion of\t\t\t\t\tmethane in all these processes is its thermal pyrolysis. The modeling results\t\t\t\t\tagree well with the experimental data on methane pyrolysis. For the temperature\t\t\t\t\trange examined, the Arrhenius expressions (pre-exponential factors and\t\t\t\t\tactivation energy) were obtained in the first-order kinetics approximation for\t\t\t\t\tthe rate of methane conversion in the processes studied. The expressions derived\t\t\t\t\tmay be useful for making preliminary estimates and carrying out engineering\t\t\t\t\tcalculations.