The Characteristics of CH₄-Vapor Catalytic Reforming Reaction Considering CO₂ and CH₄ Reaction in the Micro-Chamber

Methane and vapor catalytic-reaction is a complex reaction system, and especially CH₄/CO₂ reaction has an important influence to the methane/vapor reforming reaction. In this paper, the reaction character for methane and vapor catalytic reforming reaction in the micro-chamber wall with Ni catalyst is numerically investigated. The results show that the CH₄/CO₂ reaction has a vital influence on reactive characteristics in the different H₂O/CH₄ mole ratio and the mass flow-rate. With increasing the H₂O/CH₄ mole ratio, the concentration of H₂ and CO₂ increases, the concentration of CO increases and then decreases, but if the H₂O/CH₄ mole ratio is more than 2.5, the result is different. The reaction efficiency will descend while the flow-rate increases. The results also display that the methane conversion ratio, the vapor conversion ratio, and the hydrogen concentrations can be up to 81.73%, 69.42%, and 4.29%, while the H₂O/CH₄ mole ratio, flow-rate and methane/vapor mass flow-rate ratio are 2.5, 7 g/h and 0.1 respectively.