| 초록 |
NOx emitted from stationary and mobile combustion sources contributes to a number of environmental problems. It has been reported that commercial vanadium-based catalysts are suitable for reducing NOx. However, there are several issues when those catalysts were applied to diesel engine-based vessel. The temperature of the flue gas from vessel engine is less than 300 oC. In addition, SO2 come from oxidation of sulfur species in diesel fuel can deactivate catalysts. Many researchers have focused on modifying vanadium-based catalysts in order to meet the operation conditions for vessel. To overcome this problem, a number of eco-friendly transition metal oxides. Among them, Fe2O3 can be the most suitable oxide because of its outstanding textural properties and price competitiveness. In this work, a series of V2O5-WO3/TiO2 catalysts physically mixed with several Fe2O3 having different textural properties were prepared to investigate the effect of Fe2O3 on the catalytic activities in the NH3-SCR reaction. Physicochemical properties of the prepared catalysts were characterized by BET, XRD, Raman, SO2-TPD and NH3-TPD analyses. |
