초록 |
Selective catalytic reduction (SCR) of NOx for marine application in low temperature range has gained great interest due to Tier Ⅲ of International Maritime Organization (IMO) taking effect after 2016. Marine SCR catalyst requires the high DeNOx activity in lower temperature region than automobile one. In this study, we aimed at changing the operating temperature of V2O5/TiO2 catalyst by using various vanadium precursors with four different oxidation states. Using four different precursor samples, TiO2 supported V2O5 catalysts (1, 3, 5, 7wt%) were prepared by applying wet impregnation method. We used various analytic techniques, such as BET, TPR, TPD, XRD, XPS, Solid NMR and FT-IR to investigate the influence of oxidation states of vanadium precursor in V2O5/TiO2 on the physiochemical properties. Combination of characterization and activity results allows us to obtain the valuable information about the desirable parameter for the preparation of low temperature SCR catalyst. |