| 초록 |
CO2 reforming is generally recognized as one of the most promising technology for a utilization of greenhouse gases. The preparation technique of catalysts play a major role since it can affect their structural properties and reduction behavior, and hence the catalytic performance. In this study, Co-Ru-Zr-Si catalysts were prepared via co-precipitation method with a various pH (0.1~10) of solution in prepare process. As a result, we have found that the catalytic activities at 850oC and 20,000ml/gcat·h were affected according to the operating condition such as pH. The catalyst prepared at about pH 1 shows maximum activity close to equilibrium conversion and the highest stability. With the aid of spectroscopic and surface characterization data such as BET, XRD, XPS, TPR, SEM etc, we can conclude that the pH of solution could make the interaction between active species and support stronger than other conditions. |
