Effect of calcination temperature on Ni-Mg based monolithic catalyst for biomass gas reforming reaction

The Ni-Mg based monolithic catalyst was prepared by impregnation method. Effects of calcination temperature on microstructure and biomass gases reforming performances of the catalyst were investigated. The results indicated that there was the formation of NiO and NiMgO₂ in the catalyst during calcination at different temperatures. Compared to other calcination temperatures, calcinating at 650 ℃ facilitated the dispersion of NiO on the cordierite and the increase of active sites. Under the dry reforming condition, conversion of CH₄ and CO₂ increased first, and then decreased gradually with the increase of calcination temperature. The CH₄ and CO₂ conversion reached the highest value as the calcination temperature is 650 ℃. A similar trend was observed for the yield of H₂ and CO. Under the steam reforming condition, increasing calcination temperature promoted water gas shift reaction. In addition, changing calcination temperature may adjust selectively the ratio of H₂/CO under the steam reforming condition.