The influence of calcination temperature on catalytic activities in a Co based catalyst for CO_2 dry reforming

摘要

The carbon dioxide dry reforming of methane (CDR) reaction could be thermodynamicalry favored in the range of 800 to 1,000 ℃. However, the catalyst in this reaction should be avoided at the calcination temperature over 800 ℃ since strong metal support interaction (SMSI) in this temperature range can decrease activity due to loss of active sites. Therefore, we focused on optimizing the temperature of pretreatment and a comparison of surface characterization results for CDR. Results related to metal sintering over support, re-dispersion by changing of particle size of metal-support, and strong metal support interaction were observed and confirmed in this work. In our conclusion, optimum calcination temperature for a preparation of catalyst was proposed that 400 ℃ showed a higher and more stable catalytic activity without changing of support characteristics.