Carbon Dioxide Reforming of Methane over Carbonaceous Catalyst in a Plug Flow Reactor

Abstract

The CO2 reforming of CH4 over carbonaceous catalyst was performed using a Plug Flow Reactor in the temperature range 800~1100°C, the ratio of CH4/CO2=1 and residence time 2~30s under normal pressure. The results showed the carbonaceous catalyst was an effective catalyst for carbon dioxide reforming of methane. With increasing the reaction temperature and residence time both the CH4 conversion and CO2 conversion increased. However, the CO2 conversion was significantly higher compared with the CH4 conversion under the same reaction conditions, which indicated that the gasification reaction of the carbonaceous catalyst and carbon dioxide occurred during the reforming process. Under a reaction temperature of 1050°C and residence time over 30s, the conversion of CH4 and CO2 were 92.7% and 95.4% respectively. The oxygen groups, surface area and pore volume decreased as well as the micro-porous structure of the catalyst surface was significantly reduced for the carbonaceous catalyst after reaction.