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

摘要

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 autothermal reaction conditions, the effect of oxygen to methane ratio on the methane-wet air autothermal 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.