| 초록 |
NOx emission regulations have been tightened, and much effort has been expended to develop efficient NOx removal technologies and catalysts. One of the most efficient technologies to reduce NOx is a selective catalytic reduction with NH3 (NH3-SCR). For the NH3-SCR catalyst, the Cu-SSZ-13 zeolite was successfully commercialized due to its excellent catalytic performance and hydrothermal stability. However, the poor sulfur stability of Cu-SSZ-13 even under low levels of SO2 from the ultra-low sulfur fuel makes the limitation for broad applications, such as power plant and marine engine. In this study, we synthesized Cu-SSZ-13 catalysts with different Si/Al ratios, which were promoted with different amounts of cobalt (Co(x)Cu-SSZ-13, x = 1, 3, and 6 wt%). CoCu-SSZ-13 catalysts showed improved SO2 resistance compared to the conventional Cu-SSZ-13. The role of cobalt was investigated by various characterization methods, including XPS, TPD, and H2-TPR. |
