Carbon dioxide reforming of methane over Carbonaceous catalyst in a Plug Flow Reactor

摘要

The CO_2 reforming of CH_4 over carbonaceous catalyst was performed using a Plug Flow Reactor in the temperature range 800～1100°C, the ratio of CH_4/CO_2=1 and residence time 2～30 s 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 CH_4 conversion and CO_2 conversion increased. However, the CO_2 conversion was significantly higher compared with the CH_4 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 30 s, the conversion of CH_4 and CO_2 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.