| 초록 |
NOx emission regulations have been strengthened and demands for efficient NOx removal systems have been grown. NH3-SCR is considered as an effectual NOx removal technique and in particular, vanadium based catalysts are often used in SCR. Vanadium based catalysts have broad operating temperature range and are strongly resistant to sulfur and its affordable price is also advantageous. Recently, microporous titania has been used as a promising support because of its noticeable benefits over the commercial titania (DT51). It obtains a larger surface area, 158.6 m2/g, than the commercial titania, 82.47 m2/g, restrains undesired product, N2O and has broad performance temperature range. Due to these advantages, the catalysts supported on MPTiO2 were expected to have higher NOx conversion in low temperature than on DT51. In the present study, different amounts of vanadium (3-10 wt%) and various promoters were loaded. Characterizations including NH3-TPD, H2-TPR and N2 adsorption-desorption isotherms were performed to investigate how the catalytic activity was affected by loading change and promoter. |
