| 초록 |
The integrated gasification combined cycle (IGCC) is considered to be one of the most efficient and environmentally acceptable technologies for generating power from coal. To use this technology, it is necessary to remove the pollutants such as H2S and NH3 from the hot coal-gases. In this study, the molybdenum and nickel based sorbents on various supports such as Al (MNAI20), Ti (MNTI20), Si (MNSI20) and Zr (MNZI20) were prepared, and their simultaneous removal properties were tested in fixed-bed reactor at 650℃. The sulfur removal capacities of the MNAI20, MNTI20, MNSI20 and MNZI20 sorbents were shown 120, 122, 133 and 134 mg sulfur/g catal-sorbent. The H2S and NH3 simultaneous removal abilities of the MNAI20, MNTI20, MNSI20 and MNZI20 were 94%, 33%, 67% and 53% each other. These results indicated that MNAI20 catal-sorbents was the most suitable to remove H2S and NH3 simultaneously than the other. It was expected that the NiAl2O4 phase of MNAI20 catal-sorbent plays on important role in the ammonia decomposition during H2S absorption. This role of NiAl2O4 phase was characterized by XRD and XPS. |
