| 초록 |
The low temperature water-gas shift (LT-WGS) reaction has been carried out at gas hourly space velocity (GHSV) of 36,000 mL/g∙h over Cu/CeO2 catalysts modified with various cerium impregnation sequences. For the purpose of applying various cerium impregnation sequence, Cu/CeO2 catalysts were prepared by various preparation methods such as co-impregnation method (Cu-Ce/CeO2) and sequential impregnation method (Ce/Cu/CeO2, Cu/Ce/CeO2). The effect of cerium impregnation sequence on the physical and chemical properties related with catalytic performance of Cu/CeO2 catalysts were analyzed through various characterization techniques including N2 adsorption-desorption, N2O titration, X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, and X-ray Absorption Fine Structure (XAFS). The characterization result for each catalyst was correlated with its catalytic activity result in the LT-WGS reaction. |
