CO 2 reforming of CH 4 in coke oven gas to syngas over coal char catalyst

Abstract

The CO 2 reforming of methane (in coke oven gas) on the coal char catalyst was performed in a fixed bed reactor at temperatures between 800 and 1200 °C under normal pressure. The effects of the coal char catalyst pretreatment and the ratio of CO 2/CH 4 were studied. Experimental results showed that the coal char was an effective catalyst for production of syngas, and addition of CO 2 did not enhance the CH 4 reforming to H 2. It was also found that the product gas ratio of H 2/CO is strongly influenced by the feed ratio of CO 2/CH 4. The modified coal char catalyst was more active during the CO 2–CH 4 reforming than the coal char catalyst based on the catalyst volume, furthermore the modified catalyst exhibited high activity in CO 2–CH 4 reforming to syngas. The conversion of methane can be divided into two stages. In the first stage, the conversion of CH 4 gradually decreased. In the second stage, the conversion of methane maintained nearly constant. The conversion of CO 2 decreased slightly during the overall reactions in CO 2–CH 4 reforming. The coal char catalyst is a highly promising catalyst for the CO 2 reforming of methane to syngas.