| 초록 |
Dry reforming of methane is a desirable process for the production of syngas from greenhouse gases. However, carbon formation is a serious obstacle against catalytic activity and stability. From previous study, it was found that the Ni/ZrO2-Al2O3 catalyst prepared by modified Pechini sol-gel showed best catalytic performance regarding resistant to carbon deposition. To minimize the coke formation, titanium supported on the ZrO2-Al2O3 were prepared by modified Pechini sol-gel and the Ni/ZrTiAlOx catalysts were prepared by an impregnation method. The catalysts before and after the reaction were characterized N2 physisorption, XRD, TPR, and TPSR analysis. The prepared catalysts were investigated under the reforming of methane with carbon dioxide at temperature of 600 ℃, an atmospheric pressure, a methane/carbon dioxide ratio of 1, and a space velocity of 25,000 h-1. It was observed that the Ni/ZrTiAlOx catalyst showed improved catalytic stability than Ni/ZrO2-Al2O3 catalyst. These result can be interpreted that the Ti supported on ZrO2-Al2O3 plays important role in the formation of oxygen vacancy, and improve the catalytic stability at lower temperature. |
