Numerical Investigation on Thermal Flow-Reversal Oxidation of Dilute Methane

A two-dimensional laminar flow chemical reaction model of gas in honeycomb ceramic is developed on the basis of the local thermal non-equilibrium theory between gas and particle phase. Thermal flow-reversal oxidation process of dilute methane in coal mine ventilation air is numerically simulated. The results show the most heat of the methane oxidation can be stored by honeycomb ceramic filled in the oxidation bed of the thermal flow-reversal oxidation reactor, and then used to preheat the fresh mixture gas. The dilute methane of the mass fraction of 0.00312 in mixture gas can keep an independence self-sustain thermal oxidation course. Meanwhile, profiles of the temperature along the axial direction in the oxidation bed are mainly subjected to affected by the half cycle, mass fraction of methane in mixture gas, mass flow rate and length of oxidation bed. Results show that they are in good agreement with other experimental data.