The Effect of Oxygen to Methane Ratio on the Methane-wet Air Autothermal Reforming and Carbon Deposition in the Micro-chamber

Considering the problems of catalyst carbon deposition and reforming endothermic reaction in micro-reforming chamber, coupled methane catalyst partial oxidation and steam methane reforming can make the micro-reforming system auto-supply heat and inhibit the carbon deposited on the catalyst. For the propose of optimizing methane-wet air auto thermal reaction conditions, the effect of oxygen to methane ratio on the methane-wet air auto thermal reforming and carbon deposition in the micro-chamber were simulated, at a preheat temperature of 800 K. The results show the optimum oxygen to methane ratio was 0.2 to 0.225, with the mass fraction of H2 reached 4.52% ˜ 4.81% and the density of surface carbon deposition reduced 6.6124×10^-7˜3.833×10^-7 kmol/m² when the steam to methane ratio was 1˜2.5 as the feed.