Production of syngas from reforming of |methane and carbon dioxide over coal char in a fixedbed reactor

Based on coal gasification combined with methane reforming process, the reaction of methane and carbon dioxide was investigated over quartz sand, coal ash and char, respectively, in a fixed bed system. It was proved that coal char has distinct catalytic effect on methane conversion during the coal gasification combined with methane reforming process. Other experiments were carried out with sets of operation conditions including temperature ranging from 1073K to 1223K , the inlet CH₄/CO₂ ratio increasing from 0.33 to 3.00 and the gas-solid contact time varying from 0.13(g·min)/mL to 1.04(g·min)/mL. The results show that methane conversion increases with increasing temperature and gas-solid contact time, but decreases with increasing CH₄/CO₂ ratio. The highest methane conversion rate can get 86%. H₂/CO ratio in the product gas can be adjusted from 0.4 to 2.0 through changing the reactants' ratio of CH₄/CO₂.