Effects of Promoter and Calcination Temperatures on the Catalytic Performance of Y Promoted Co/WC‐AC for Dry Reforming of Methane

Abstract

AbstractCH4‐CO2 reforming is a good way to convert two environmentally harmful greenhouse gases into a high value syngas. However, the catalytic activity and stability of the catalysts need to be further improved. In this paper, the effects of promoter Y and calcination temperature on the catalytic activity and stability of Co/WC‐AC catalysts were investigated. The catalysts were characterized by BET, XRD, CO2‐TPD, H2‐TPR, XPS, and TG‐DSC. XPS and H2‐TPR. The results indicated that the introduction of Y decreased the reduction temperature of Co2O3 species and facilitated the formation of Co2+ species. Meanwhile, the addition of Y increased the content of lattice oxygen on the catalyst surface, which enhanced the carbon elimination capacity of the catalyst. The TG‐DSC results showed that the activity and stability of the catalysts calcined at 550 °C were poor due to the presence of carbon materials with weak carbon interactions on the catalyst support surface. Meanwhile, the catalyst calcined at 700 °C lead to the collapse of the pores due to the high calcination temperature, which eventually led to the decrease of the catalyst stability. It was found that the Co‐Y/WC‐AC catalysts prepared at the calcination temperature of 600 °C had the best catalytic activity and stability.